Jessica R.L. Leif, MS

Department of Radiation Physics, Division of Radiation Oncology - Clinical

Education & Training

Postgraduate Training

2001-2001	Develop PL/SQL Program Units, Houston Education Center, Houston, Texas
2001-2001	Introduction to Oracle 8I: SQL and PL/SQL, Houston Education Center, Houston, Texas
1999-1999	Dosimetry of High Energy Electron and X-ray Therapy Machines, The University of Texas M.D. Anderson Cancer Center, Houston, Texas
1998-1998	Interstitial and Intracavitary Dosimetry: Basic Methods and Calculations, The University of Texas M.D. Anderson Cancer Center, Houston, Texas
1998-1998	External Beam Dosimetry: Basic Methods and Calculations, The University of Texas M. D. Anderson Cancer Center, Houston, Texas
1998-1998	Introduction to Radiotherapy Physics: Principles and Calibrations, The University of Texas M. D. Anderson Cancer Center, Houston, Texas

Licenses & Certifications

2004	Medical Physicist License awarded by the Texas Medical Board
2003	American Board of Radiology, Therapeutic Radiological

Experience & Service

Administrative Appointments/Responsibilities

Associate Director, Imaging and Radiation Oncology Core, Radiation Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 2017 - Present

Assistant Director, IROC-Houston QA Center, Radiation Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 2014 - 2016

Supervisor of Dosimetry, Radiation Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 2010 - Present

Assistant Director, Radiological Physics Center, Radiation Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 2007 - 2014

Senior Medical Physicist, Radiation Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 2005 - 2007

Other Professional Positions

Consultant – Brachytherapy Phantom, International Atomic Energy Association, Vienna, 2024 - Present

Member, American Association of Physicists in Medicine Task Group 425: Medical Physics Guidelines for Clinical Trials using Brachytherapy Clinical Applicators, College Park, MD, 2024 - Present

Member, Global Harmonization Group, EORTC, 2024 - Present

Member, Global Harmonization Group, EORTC, 2023 - Present

Member, American Association of Physicists in Medicine Working Group on Radiation Dosimetry, College Park, MD, 2019 - Present

Member, American Association of Physicists in Medicine Task Group 332: Verification of Vendor Provided Data, Tools and Test Procedures, College Park, MD, 2018 - Present

Member, American Association of Physicists in Medicine Unit No. 35: Commissioning of Model-Based Dose Calculation Algorithms in Brachytherapy, College Park, MD, 2018 - 2023

Member, American Association of Physicists in Medicine Task Group 308: Clinical Implementation of Data-driven Quality Control and Automated Treatment Planning, College Park, MD, 2017 - Present

Liaison- Vice Chair, American Association of Physicists in Medicine Brachytherapy Source Registry Work Group, Alexandria, VA, 2017 - 2023

Member, American Association of Physicists in Medicine Working Group for the Veterinary Radiation Therapy Oncology, Alexandria, VA, 2017 - 2023

Member, American Association of Physicists in Medicine Task Group 292: Electronic Brachytherapy Dosimetry, College Park, MD, 2016 - Present

Member, American Association of Physicists in Medicine Review and Extension of beam quality conversion factors for TG-51 Protocol, Alexandria, VA, 2016 - 2023

Board Member-at-Large Designate, American Association of Physicists in Medicine Board of Directors, College Park, MD, 2015 - 2015

Member, NRG Oncology Medical Physics Committee, Philadelphia, PA, 2014 - Present

Consultant, NRG Oncology, Philadelphia, PA, 2014 - Present

Member, American Association of Physicists in Medicine Brachytherapy Subcommittee, College Park, MD, 2014 - Present

Member, American Association of Physicists in Medicine Working on Model-Based Dose Calculation Algorithms in Brachytherapy, College Park, MD, 2014 - 2019

Member, Brachytherapy Source Registry Work Group, College Park, MD, 2013 - Present

Liaison, Working Group on Brachytherapy Dosimetry, College Park, MD, 2013 - Present

Member, American Association of Physicists in Medicine Working Group on Recommendations for Radiotherapy External Beam Quality Assurance, College Park, MD, 2012 - 2023

Consultant, Radiation Therapy Oncology Group, Philadelphia, PA, 2010 - 2014

Member, American Association of Physicists in Medicine Working Group on Radiation Dosimetry, College Park, MD, 2009 - 2014

Member, Physics Credentialing Committee, Department of Radiation Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX, 2008 - Present

Member, American Association of Physicists in Medicine Working Group on Recommendations for Radiotherapy External Beam Quality Assurance, College Park, MD, 2007 - 2009

Member, American Association of Physicists in Medicine Task Group 135: QA for Robotic Radiosurgery, College Park, MD, 2006 - 2011

Member, American Association of Physicists in Medicine Task Group 106: Accelerator beam data commissioning equipment and procedures, College Park, MD, 2005 - 2010

Member, American Association of Physicists in Medicine Professional and Public Relations Committee, College Park, MD, 2004 - 2005

Consultant, Gynecologic Oncology Group, Philadelphia, PA, 1999 - 2014

Extramural Institutional Committee Activities

Member, Ongoing Practice Performance Evaluation Program, Department of Radiation Physics, The University of Texas M. D. Anderson Cancer Center, The University of Texas MD Anderson Cancer Center, 2009 - Present

Member, Physics Credentialing Committee, Department of Radiation Physics, The University of Texas M. D. Anderson Cancer Center, The University of Texas MD Anderson Cancer Center, 2008 - Present

Honors & Awards

2019 - 2024	Fellow, American Association of Physicist in Medicine
2007	Keynote Speaker, East Carolina Physics Department Graduation, East Carolina University, Department of Physics, Greenville, NC
2007	A Legacy of Leadership: 100 Incredible ECU Women, The Women's Roundtable, East Carolina University
2005	The University of Texas M. D. Anderson Cancer Center Department of Radiation Physics Leadership Award, University of Texas M.D. Anderson Cancer Center
1995 - 2024	New York Academy of Sciences, Union College
1995 - 2024	American Physical Society, Union College
1995 - 2024	Sigma Xi, Union College

Professional Memberships

Particle Therapy Cooperative Group - North America

2014 - Present

American Brachytherapy Society

2010 - Present

American Society for Therapeutic Radiology and Oncology

2003 - Present

American Association of Physicists in Medicine

2001 - Present

Selected Presentations & Talks

National Presentations

2024. TG-372: A joint AAPM, ESTRO, ABG, and ABS Report on Commissioning of Model-Based Dose Calculation Algorithms (MBDCA) in Brachytherapy. Conference. St. Louis, MO, US.
2023. Data Managers Training. Conference. Chicago, IL, US.
2022. Data Managers Training. Conference. Chicago, IL, US.
2022. Data Managers Training. Conference. Data Managers Training. Chicago, IL, US.
2021. Presenter at European Investigator meeting for AdvanTIG-301 Study. Conference. Presenter at European Investigator meeting for AdvanTIG-301 Study, US.
2021. Presenter at Asia Investigator meeting for AdvanTIG-301 Study. Conference. Presenter at Asia Investigator meeting for AdvanTIG-301 Study, US.
2021. Presenter at US Investigator meeting for AdvanTIG-301 Study. Conference. Presenter at US Investigator meeting for AdvanTIG-301 Study, US.
2020. Automated Planning and Data-Driven Plan Quality Control. Conference. Automated Planning and Data-Driven Plan Quality Control, US.
2018. Presenter, Radiation therapy quality assurance in clinical trials: why and how. Conference. American Association for Cancer Research, U. S. Food and Drug Administration, American Society for Radiation Oncology. Bethesda, MD, US.
2017. Presenter, Radiation therapy quality assurance in clinical trials: why and how. Conference. Presenter, Radiation therapy quality assurance in clinical trials: why and how. Bethesda, MD, US.
2016. Data Managers Training. Conference. NRG Oncology Group. Atlanta, GA, US.
2015. Data Managers Training. Conference. NRG Oncology Group. Denver, CO, US.
2014. Imaging and Radiation Oncology Core Cooperative. Conference. American Association of Physicists on Medicine Southwest Chapter Meeting. San Antonio, TX, US.
2014. Presenter for Investigator meeting for TACO study. Conference. Korean Gynecologic Oncology Group. Waikiki, HI, US.
2013. Presenter at Investigator meeting for CS001P3 study. Conference. APTIV & CEL-SCI. Phoenix, AZ, US.
2013. Data Managers Training. Conference. NRG Oncology. San Diego, CA, US.
2011. Data Managers Training. Conference. Data Managers Training. Philadelphia, PA, US.
2011. Data Managers Training. Conference. Data Managers Training. Philadelphia, PA, US.
2011. Data Managers Training. Conference. Data Managers Training. Philadelphia, PA, US.
2011. Data Managers Training. Conference. Data Managers Training. Philadelphia, PA, US.
2011. Data Management Training Series. Conference. Data Management Training Series. San Diego, CA, US.
2010. Radiation Research Associates. Conference. Radiation Therapy Oncology Group. Philadelphia, PA, US.
2009. Data Management Training Series. Conference. Gynecological Oncology Group. Anaheim, CA, US.
2008. Data Management Training Services. Conference. Data Management Training Services. Anaheim, CA, US.
2007. Data Managers Training. Conference. Radiation Therapy Oncology Group. Philadelphia, PA, US.
2007. Data Management Training Services. Conference. Data Management Training Services. Philadelphia, PA, US.
2005. The Radiological Physics Center’s Anthropomorphic Quality Assurance Phantom Family: New Developments. Conference. American Association of Physicists in Medicine. Seattle, WA, US.
2004. High-Energy Photon Standard Dosimetry Data: A Quality Assurance Tool. Conference. American Association of Physicists in Medicine. Pittsburgh, PA, US.
2001. American Association of Physicists in Medicine TG-51 Workshop. Conference. American Association of Physicists in Medicine Southeast Chapter Meeting. Atlanta, GA, US.
2000. Clinical Implementation of TG-51. Conference. Florida Chapter of the American Association of Physicists in Medicine. Orlando, FL, US.
2000. The Implementation of TG-51. Conference. American Association of Physicists in Medicine Summer School Workshop. De Kalb, IL, US.
2000. American Association of Physicists in Medicine TG-51 Workshop. Conference. Southwest Chapter of American Association of Physicists in Medicine meeting. San Antonio, TX, US.
2000. American Association of Physicists in Medicine Task Group 51. Conference. Tri-County Brachytherapy Discussion group of South Florida. Boca Raton, FL, US.
1999. American Association of Physicists in Medicine TG-51 Protocol for Clinical Reference Dosimetry of High Energy Photon and Electron Beams. Conference. Southwest Chapter of the American Association of Physicists in Medicine. Dallas, TX, US.

International Presentations

2025. Presenter, ICARO-4 Meeting. Conference. ICARO-4. Vienna, AT.
2019. Presenter, Brain Committee. Conference. Presenter, Brain Committee. Toronto, CA.
2016. Presenter at Investigator meeting for CS00193 Study. Conference. ICON & CEL-SCI. Lisbon, PT.
2014. Presenter at Investigator meeting for CS00193 study. Conference. ERGOMED & CEL-SCI, MY.
2014. Presenter at Investigator meeting for CS00193 Study. Conference. ERGOMED & CEL-SCI, LK.
2013. Presenter at CRA meeting for CS001P3 study. Conference. ERGOMED & CEL-SCI. Dubrovnik, HR.
2013. Presenter at Investigator meeting for CS001P3 study. Conference. ERGOMED & CEL-SCI. Dubrovnik, HR.
2012. Presenter at International Protocol Start-Up & Training Meeting. Conference. AIDS Malignancy Consortium. Johannesburg, ZA.

Formal Peers

2017. NSABP B-51/RTOG 1304. Invited, US.
2017. NSABP B-51/RTOG 1304. Invited, US.
2015. CEL-SCI RTQA Procedures. Invited, US.
2007. Keynote Speaker: East Carolina Physics Department Graduation. Invited. Greenville, NC, US.
2000. In-Service to Physicists in the Houston Area. Invited. Houston, TX, US.

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Selected Publications

Peer-Reviewed Articles

Duan, L, Mehrens, H, Kry, SF, Leif, JL, Hernandez, N, Acuna Scafati, LB, Taylor, PA. Trends and Challenges. International Journal of Particle Therapy 19, 2026. e-Pub 2026. PMID: 41584861.
Kim, H, Deng, W, Zamarin, D, Xiao, Y, Chino, J, Benedict, SH, Nguyen, H, Leif, JL, McNulty, S, Ghamande, SA, Ferguson, CL, Mell, LK, Holman, LL, Mathews, C, Quick, AM, Olawaiye, AB, Hopp, E, Mannel, RS, Leath-III, CA, O'Cearbhaill, RE, Aghajanian, C, Schilder, RJ, Mayadev, J. Image guided brachytherapy quality assurance on NRG GY017 investigating immunotherapy in addition to chemoradiation for locally advanced cervical cancer. Brachytherapy 25(1):127-135, 2026. e-Pub 2026. PMID: 41107078.
Taylor, PA, Mehrens, H, Glenn, MC, Brooks, FE, Scott, H, Duan, L, Meyers, T, Rojas, DC, Yang, M, Alvarez, PE, Leif, JL, Molineu, HA, Kry, SF. Reference dosimetry data and machine performance comparison for tomotherapy delivery systems audited by IROC. Journal of applied clinical medical physics 26(12), 2025. e-Pub 2025. PMID: 41253711.
Leif JR, Kim H, Deng W, Zamarin D, Xiao Y, Chino J, Benedict S, Nguyen H, Lowenstein J, McNulty S, Ghamande S, Ferguson C, Mell L, Holman LL, Mathews C, Quick A, Olawaiye A, Hopp E, Mannel R, Leath-III CA, O’Cearbhaill R, Aghajanian C, Schilder RJ, Mayadev J. article Image Guided Brachytherapy Quality Assurance on NRG GY017 investigating immunotherapy in addition to Chemoradiation for Locally Advanced Cervical Cancer, 2025.
Smith, K, Blasi, O, Casey, D, Chan, M, Dieterich, S, Dresser, S, Kennedy, C, Kielar, KN, Leif, JL, Pawlicki, T, Popple, RA, Solodkin, A, Sutlief, S, Weiser, M. AAPM Task Group Report 332. Medical physics 52(6):3509-3527, 2025. e-Pub 2025.
Leath, CA, Deng, W, Mell, LK, Richardson, DL, Walker, JL, Holman, LL, Lea, JS, Amarnath, SR, Santos-Reyes, LJ, Arend, RC, Mayadev, J, Jegadeesh, N, DiSilvestro, P, Chon, HS, Ghamande, SA, Gao, L, Albuquerque, K, Chino, JP, Donnelly, ED, Feddock, J, Leif, JL, Quick, AM, Kunos, CA, Mackay, H, Aghajanian, C, Monk, BJ. Incorporation of triapine (T) to cisplatin chemoradiation (CRT) for locally advanced cervical and vaginal cancer. Gynecologic oncology 195:122-133, 2025. e-Pub 2025. PMID: 40101606.
Tchelebi, LT, Segovia, D, Smith, K, Shi, Q, Fitzgerald, TJ, Chuong, MD, Zemla, TJ, O'Reilly, EM, Meyerhardt, JA, Koay, EJ, Leif, JL, Shergill, A, Katz, MH, Herman, JM. Radiation Therapy Quality Assurance Analysis of Alliance A021501. International Journal of Radiation Oncology Biology Physics 120(1):111-119, 2024. e-Pub 2024. PMID: 38492812.
Muir, B, Davis, SD, Dhanesar, S, Hillman, Y, Iakovenko, V, Kim, GY, Alves, VL, Lei, Y, Leif, JL, Renaud, J, Sarfehnia, A, Siebers, JV, Tantôt, L. AAPM WGTG51 Report 385. Medical physics 51(9):5840-5857, 2024. e-Pub 2024. PMID: 38980220.
Beaulieu, L, Ballester, F, Granero, D, Tedgren, ÅC, Haworth, A, Leif, JL, Ma, Y, Mourtada, F, Papagiannis, P, Rivard, MJ, Siebert, FA, Sloboda, RS, Smith, RL, Thomson, RM, Verhaegen, F, Paiva-Fonseca, G, Vijande, J. AAPM WGDCAB Report 372: A joint AAPM, ESTRO, ABG, and ABS report on commissioning of model-based dose calculation algorithms in brachytherapy. Medical physics 50(8):e946-e960, 2023. e-Pub 2023. PMID: 37427750.
Lin, LL, Ndlovu, N, Leif, JL, Wirth, M, Lee, J, Stier, EA, Garg, MK, Kotzen, J, Kadzatsa, W, Palefsky, J, Krown, SE, Einstein, MH. Quality Assurance in Clinical Trials Requiring Radiation Therapy in Sub-Saharan Africa. International Journal of Radiation Oncology Biology Physics 116(2):439-447, 2023. e-Pub 2023. PMID: 36493958.
Muir B, Culberson W, Davis S, Kim GY, Lee SW, Lowenstein J, Renaud J, Sarfehnia A, Siebers J, Tantôt L, Tolani N. AAPM WGTG51 Report 374: Guidance for TG-51 reference dosimetry. Med Phys 49(11):6739-6764, 2022. e-Pub 2022. PMID: 36000424.
Taylor PA, Lowenstein J, Followill D, Kry SF. The value of on-site proton audits. Int J Radiat Oncol Biol Phys 112(4):1004-1011, 2022. e-Pub 2021. PMID: 34780973.
Williamson CW, Sirák I, Xu R, Portelance L, Wei L, Tarnawski R, Mahantshetty U, Heide ES, Yashar CM, McHale MT, Bosch W, Lowenstein J, Saenz CC, Plaxe S, Eskander R, Einck J, Mundt AJ, Mayadev J, Mell LK. Positron emission tomography-guided bone marrow-sparing radiation therapy for locoregionally advanced cervix cancer: final results from the INTERTECC Phase II/III trial. Int J Radiat Oncol Biol Phys 112(1):169-178, 2022. e-Pub 2021. PMID: 34419564.
Fitzgerald, TJ, Followill, DS, Laurie, F, Boterberg, T, Hanusik, R, Kessel, SK, Karolczuk, K, Iandoli, M, Ulin, K, Morano, K, Bishop-Jodoin, M, Kry, SF, Leif, JL, Molineu, HA, Moni, J, Cicchetti, MG, Prior, F, Saltz, JH, Sharma, A, Mandeville, HC, Bernier-Chastagner, V, Janssens, GO. Quality assurance in radiation oncology. Pediatric Blood and Cancer 68(S2), 2021. e-Pub 2021. PMID: 33818891.
FitzGerald TJ, Followill D, Laurie F, Boterberg T, Hanusik R, Kessel S, Karolczuk K, Iandoli M, Ulin K, Morano K, Bishop-Jodoin M, Kry S, Lowenstein J, Molineu A, Moni J, Cicchetti MG, Prior F, Saltz J, Sharma A, Mandeville H, Bernier-Chastagner V, Janssens G. Quality assurance in radiation oncology. Pediatric Blood & Cancer 68(S2):e28609, 2021. e-Pub 2021.
Yusufaly T, Miller A, Medina-Palomo A, Williamson CW, Nguyen H, Lowenstein J, Leath CA, Xiao Y, Moore KL, Moxley KM, Chevere-Mourino CM, Eng TY, Zaid T, Mell LK. A multi-atlas approach for active bone marrow sparing radiation therapy: implementation in the NRG-GY006 trial. Int J Radiat Oncol Biol Phys 47(8):e913-e919. e-Pub 2020. PMID: 32629079.
Culberson WS, Davis SD, Gwe-Ya Kim G, Lowenstein JR, Ouhib Z, Popovic M, Waldron TJ, Safigholi H, Simiele SJ, Rivard MJ. Dose rate considerations for the INTRABEAM electronic brachytherapy system: Report from the American Association of Physicists in Medicine Task Group No. 292*. Med Phys 47(8):e913-e919, 2020. e-Pub 2020. PMID: 32246456.
Kry S, Peterson C, Howell R, Izewska J, Lye J, Clark C, Nakamura M, Hurkmans C, Alvarez P, Alves A, Bokulic T, Followill D, Kazantsev P, Lowenstein J, Molineu A, Palmer J, Smith S, Taylor P, Williams I. Remote beam output audits: a global assessment of results out of tolerance. phiRO 7:39-44. e-Pub 2018.
Kerns JR, Followill DS, Lowenstein J, Molineu A, Alvarez P, Taylor PA, Kry SF. Reference dosimetry data and modeling challenges for Elekta accelerators based on IROC-Houston site visit data. Med Phys 45(5):2337-2344, 2018. e-Pub 2018. PMID: 29537634.
Kry SF, Dromgoole L, Alvarez P, Leif J, Molineu A, Taylor P, Followill DS. Radiation therapy deficiencies identified during on-site dosimetry visits by the Imaging and Radiation Oncology Core Houston Quality Assurance Center. Int J Radiat Oncol Biol Phys 99(5):1094-1100, 2017. e-Pub 2017. PMID: 29029890.
Muir B, Culberson W, Davis S, Kim GY, Huang Y, Lee SW, Lowenstein J, Sarfehnia A, Siebers J, Tolani N. Insight gained from responses to surveys on reference dosimetry practices. J Appl Clin Med Phys 18(3):182-190, 2017. e-Pub 2017. PMID: 28397396.
Mell LK, Sirák I, Wei L, Tarnawski R, Mahantshetty U, Yashar CM, McHale MT, Xu R, Honerkamp-Smith G, Carmona R, Wright M, Williamson CW, Kasaová L, Li N, Kry S, Michalski J, Bosch W, Straube W, Schwarz J, Lowenstein J, Jiang SB, Saenz CC, Plaxe S, Einck J, Khorprasert C, Koonings P, Harrison T, Shi M, Mundt AJ, Group IS. Bone marrow-sparing intensity modulated radiation therapy with concurrent cisplatin for stage IB-IVA cervical cancer: An international multicenter phase II clinical trial (INTERTECC-2). Int J Radiat Oncol Biol Phys 97(3):536-545, 2017. e-Pub 2017. PMID: 28126303.
Al-Hallaq HA, Chmura SJ, Salama JK, Lowenstein JR, McNulty S, Galvin JM, Followill DS, Robinson CG, Pisansky TM, Winter KA, White JR, Xiao Y, Matuszak MM. Benchmark credentialing results for NRG-BR001: The first National Cancer Institute-sponsored trial of stereotactic body radiation therapy for multiple metastases. Int J Radiat Oncol Biol Phys 97(1):155-163, 2017. e-Pub 2017. PMID: 27843033.
Al-Hallaq HA, Chmura S, Salama JK, Winter KA, Robinson CG, Pisansky TM, Borges V, Lowenstein JR, McNulty S, Galvin JM, Followill DS, Timmerman RD, White JR, Xiao Y, Matuszak MM. Rationale of technical requirements for NRG-BR001: The first NCI-sponsored trial of SBRT for the treatment of multiple metastases. Pract Radiat Oncol 6(6):E291-E298, 2016. e-Pub 2016. PMID: 27345129.
Kerns JR, Followill DS, Lowenstein J, Molineu A, Alvarez P, Taylor PA, Kry SF. Agreement between institutional measurements and treatment planning system calculations for basic dosimetric parameters as measured by the Imaging and Radiation Oncology Core-Houston. Int J Radiat Oncol Biol Phys 95(5):1527-1534, 2016. e-Pub 2016. PMID: 27315667.
Kerns JR, Followill DS, Lowenstein J, Molineu A, Alvarez P, Taylor PA, Stingo FC, Kry SF. Technical Report: Reference photon dosimetry data for Varian accelerators based on IROC-Houston site visit data. Med Phys 43(5):2374, 2016. e-Pub 2016. PMID: 27147349.
Followill DS, Kry SF, Qin L, Lowenstein J, Molineu A, Alvarez P, Aguirre JF, Ibbott GS. The Radiological Physics Center's standard dataset for small field size output factors. J Appl Clin Med Phys 13(5):3962, 2012. e-Pub 2012. PMID: 22955664.
Das IJ, Cheng CW, Watts RJ, Ahnesjö A, Gibbons J, Li XA, Lowenstein J, Mitra RK, Simon WE, Zhu TC. Accelerator beam data commissioning equipment and procedures: report of the TG-106 of the Therapy Physics Committee of the AAPM. Med Phys 35(9):4186-215, 2008. e-Pub 2008. PMID: 18841871.
Ibbott GS, Followill DS, Molineu HA, Lowenstein JR, Alvarez PE, Roll JE. Challenges in credentialing institutions and participants in advanced technology multi-institutional clinical trials. Int J Radiat Oncol Biol Phys 71(1):S71-S75, 2008. e-Pub 2008. PMID: 18406942.
Nag S, Cardenes H, Chang S, Das IJ, Erickson B, Ibbott GS, Lowenstein J, Roll J, Thomadsen B, Varia M. Proposed guidelines for image-based intracavitary brachytherapy for cervical carcinoma: report from Image-Guided Brachytherapy Working Group. Int J Radiat Oncol Biol Phys 60(4):1160-72, 2004. e-Pub 2004. PMID: 15519788.
Cho SH, Lowenstein JR, Balter PA, Wells NH, Hanson WF. Comparison between TG-51 and TG-21: Calibration of photon and electron beams in water using cylindrical chambers. J Appl Clin Med Phys 1(3):108-115, 2000. e-Pub 2000. PMID: 11674825.

Review Articles

Kim H, Lee YC, Benedict SH, Dyer B, Price M, Rong Y, Ravi A, Leung E, Beriwal S, Bernard ME, Mayadev J, Leif JR, Xiao Y. Dose summation strategies for external beam radiation therapy and brachytherapy in gynecologic malignancy: a review from the NRG Oncology and NCTN medical physics subcommittees. Int J Radiat Oncol Biol Phys 111(4):999-1010, 2021. e-Pub 2021. PMID: 34147581.

Professional Educational Materials

Lowenstein J. 50 Years of Supporting Clinical Trials and the Radiation Oncology Community, 2019.
Followill DS, Lowenstein JR, Ibbott G. Quality Assurance: Its Here to Stay, 2003.
Lowenstein JR. Implementation of TG-51: practical considerations, 2000.
Lowenstein JR. Educational video on how to utilize the TG-51 calibration protocol, 2000.

Abstracts

Taylor PA, Mehrens H, Glenn MC, Brooks F, Scott H, Duan L, Meyers T, Rojas DC, Yang M, Alvarez P, Lowenstein J, Molineu A, Kry SF. Reference dosimetry data and machine performance comparison for tomotherapy delivery systems audited by IROC. J. Appl. Clin. Med. Phys 26(12), 2025. e-Pub 2025.
Leath CA, Deng W, Mell LK, Richardson DL, Walker JL, Holman LL, Lea JS, Amarnath SR, Santos-Reyes LJ, Arend RC, Mayadev J, Jegadeesh N, DiSilvestro P, Chon HS, Ghamande SA, Gao L, Albuquerque K, Chino JP, Donnelly E, Feddock JM, Lowenstein J, Quick AM, Kunos CM, MacKay H, Aghajanian C, Monk BJ. Incorporation of triapine (T) to cisplatin chemoradiation (CRT) for locally advanced cervical and vaginal cancer. Elsevier 195:122-133, 2025.
Acuna Scafati L, Lowenstein J, Taylor P, Boise P. Automation of Clinical Trial Credentialing Letter Upload. Med Phys, 2022. e-Pub 2022.
Taylor P, Lowenstein J, Kry S. Challenges and Successes of Adapting Proton Peer Review During Pandemic Travel Restrictions. Med Phys, 2022. e-Pub 2022.
Taylor P, Lowenstein J, Followill D, Kry S. The Utility of Medical Physics Proton Peer Review for Clinical Trials. Med Phys, 2021. e-Pub 2021.
Followill D, Lowenstein J, Molineu A, Alvarez P, Taylor P, Kry S. The IROC Houston Quality Assurance Center’s independent peer review QA program. Med Phys, 2020. e-Pub 2020.
Molineu A, Alvarez A, Taylor P, Lowenstein J, Kry, S, Followill D. IROC Houston QA Center’s international anthropomorphic phantom activity. Med Phys 45(6):2779, 2019. e-Pub 2019.
Alvarez A, Taylor P, Lowenstein J, Molineu A, Kry, S, Followill D. Criteria for the evlautaion of the percentage depth dose for electron beam based on OSLD measurements. Med Phys 45(6):2779, 2019. e-Pub 2019.
Lowenstein J, Nguyen H, Roll J, Followill D. Have benchmarks and pre-treatment reviews impacted the clinical trial deviation rate. Med Phys 45(6):2779, 2019. e-Pub 2019.
Lowenstein J, Alvarez P, Smith A, Followill D. The evalution of in-vivo remote dosimetry program. Med Phys 45(6):2779, 2018. e-Pub 2018.
Molineu A, Chi P, Lowenstein J, Followill D. IGRT credentialing for NCI sponsored clinical trials. Med Phys 45(6):2732, 2018. e-Pub 2018.
Followill D, Lowenstein J, Taylor P, Molineu A, Alvarez P, Ibbott G, Hanson W, Kry S. The 50th anniversary of the Radiological Physics Center/IROC Houston QA Center activities and findings. Med Phys 45(6):2720, 2018. e-Pub 2018.
Alvarez P, Molineu A, Lowenstein J, Taylor P, Kry S, Followill D. IROC Houston QA Center's independent peer review quality assurance program for the Veteran Affairs VA radiotherapy facilities. Med Phys 44(6):2658, 2017. e-Pub 2017.
Lowenstein J, Holguin, Followill D. What is the IROC roster?. Med Phy 44(6):2650, 2017. e-Pub 2017.
Followill D, Molineu A, Alvarez P, Lowenstein J, Taylor P, Hernandez N, Nguyen T, Meherns H, Lewis B, Kry S. IROC Houston QA Center end-to-end QA phantom program key findings over the past 15 years. Med Phys 44(6):2645, 2017. e-Pub 2017.
Alvarez P, Molineau A, Lowenstein J, Taylor P, Kry SF, Followill DS. Independent remote audits for TG-51 non compliant photon beams performed by the IROC Houston QA Center. Med Phys 43(6):3574, 2016. e-Pub 2016.
Kim G, Muir B, Culerson W, Davis S, Huang Y, Lee S, Lowenstein J, Sarfehnia A, Tolani N, Siebers J. Results of a survey on the implementation of the TG-51 protocol and associated addendum on reference dosimetry of external beams. Med Phys 43(6):3743, 2016. e-Pub 2016.
Lowenstein J, Molineau A, Al-Hallaq H, Matuszah M, Craig T, Ulin K, Xiao Y, Yin F, Followill DS. IGRT credentialing in NCTN trials. Med Phys 43(6):3417, 2016. e-Pub 2016.
Lowenstein JL, Nguyen H, Tailor A, Galvin J, Followill DS, Kiniry D, Julian T, Mamounas E, White J, Khan A, Shaitelman S, Torres M, Vicini F, Wolmark N, Curran W. An update of the credentialing process for the NRG Oncology NSABP B-51 / RTOG 1304 phase III randomized clinical trial. Int J Radiat Oncol Biol Phys 93(3):E570, 2015. e-Pub 2015.
Lowenstein J, Nguyen H, Roll J, Walsh A, Tailor A, Followill DS. Benchmarks and pre-treatment reviews: A study of quality assurance effectiveness. Med Phys 42(6):3365-3366, 2015. e-Pub 2015.
Sloboda R, Ballester F, Carlsson Tedgren A, Culberson W, Esthappan J, Haworth A, Lowenstein J, Ma Y, Mourtada F, Papagiannis P, Pike T, Rivard M, Siebert F, Smith R, Spadinger I, Taylor P, Verhaegen F, Vijande J, Beaulieu L. Infrastructure and process for model-based dose calculation software commissioning in brachytherapy. Med Phys 42(6):3708, 2015. e-Pub 2015.
Kry S, Dromgoole P, Alvarez P, Lowenstein J, Molineu A, Taylor P, Followill DS. IROC Houston on-site audits and parameters that affect performance. Med Phys 42(6):3692, 2015. e-Pub 2015.
Kry S, Dromgoole L, Alvarez P, Lowenstein J, Molineu A, Taylor P, Followill DS. Common errors and deficiencies in radiation oncology practice. Med Phys 42(6):3691-3692, 2015. e-Pub 2015.
Followill DS, Kry S, Molineu A, Lowenstein J, Alvarez P, Taylor P, Nguyen H, Hernandez N, Lujano C, Nguyen T, Keith T, Roll J, Tailor A. The Imaging and Radiation Oncology Core Houston (IROC Houston) QA Center international activities outside North America. Med Phys 42(6):3628, 2015. e-Pub 2015.
Taylor P, Lowenstein J, Kry S, Ibbott G, Followill DS. A comparison of CT number to relative linear stopping power conversion curves used by proton therapy centers. Med Phys 42(6):3616, 2015. e-Pub 2015.
Lee P, ALvarez P, Taylor P, Lowenstein J, Molineu A, Kry S, Followil DS. An analysis of TG-51 electron beam calibration correction factor uncertainty. Med Phys 42(6):3353-3354, 2015. e-Pub 2015.
Followill DS, Lowenstein J, Molineu A, Alvarez P, Summers P, Kry S. The Radiological Physics Center (RPC): 45 years of improving radiotherapy dosimetry. Med Phys 41(6):97, 2014. e-Pub 2014.
Kerns J, Alvarez P, Followill DS, Lowenstein J, Molineu A, Summers P, Kry S. Aggregation of linac measurements data. Med Phys 41(6):455, 2014. e-Pub 2014.
Summers P, Lowenstein J, Jakel O, Prokesch H, Alvarez P, Followill DS. Validation of the use of OSLD for carbon beam remote dosimetry. Med Phys 41(6):344, 2014. e-Pub 2014.
Kerns J, Alvarez P, Followill DS, Lowenstein J, Molineu A, Summers P, Kry S. Small field jaw/MLC reference data. Med Phys 41(6):334-335, 2014. e-Pub 2014.
Lowenstein J, Nguyen H, Holke A, Galvin J, Followill D. Technical aspects of credentialing for the NSABP B-51/RTOG 1304 trial. Med Phys 41(6):295-296, 2014. e-Pub 2014.
Leif J, Nguyen H, Frank S, Kuban D, Pollack A, Hall F, Harris I, Tailor R, Followill DS. Common errors found in Low Dose Rate (LDR) prostate credentialing. Int J Radiat Oncol Biol Phys 87(2):S361, 2013. e-Pub 2013.
Lowenstein J, Roll J, Hollan A, Nguyen H, Followill DS. The value of rapid reviews. Med Phys 40(6):247, 2013. e-Pub 2013.
Lowenstein JR, Kry SS, Molineu A, Alvarez P, Aguirre JF, Summer P, Followill D. High energy photon standard dosimetry data: A quality assurance tool. Med Phys 39(6):3754, 2012. e-Pub 2012.
Followill, D, Lowenstein J, Molineu A, Alvarez P, Aguirre J, Kry S, Summers P, Ibbott G. The Radiological Physics Center's quality audit program: Where can we improve?. Med Phys 39(6):3866, 2012. e-Pub 2012.
Hollan A, Lowenstein JR, Nguyen H, Hall F, Harris I, Roll J, Followill D. The Radiological Physics Center's credentialing dosimetry reviews: Their effect on clinical trial deviation rates. Med Phys 39(6):3749, 2012. e-Pub 2012.
Lowenstein J, Roll J, Harris I, Hall F, Hollan A, Followill, DF. Cervix brachytherapy dosimetry: Inconsistencies in defining bladder and rectal points. Med Phys 38(6):3572, 2011. e-Pub 2011.
Hollan A, Lowenstein J, Harris I, Hall F, Roll J, Followill D. Requirements for performing a retrospective patient chart review at the Radiological Physics Center (RPC) for clinical trials. Med Phys 38(6):3629, 2011. e-Pub 2011.
Dieterich S, Cavedon C, Chuang C, Chohan A, Garrett J, Lee C, Lowenstein J. QA of Radiation Delivery Systems - TG135 QA for robotic radiosurgery. Med Phys 37(6):3374, 2010. e-Pub 2010.
Leif J, Roll J, Davis C, Ibbott G. Rapid reviews reduce the rate of protocol deviations. Int J Radiat Oncol Biol Phys 75(3):S617, 2009. e-Pub 2009.
Dieterich S, Cavedon C, Chuang C, Cohen A, Garrett J, Lee C, Lowenstein J, D'Souza M, Taylor D, Wu X, Yu C. Performance-based QA for radiotherapy: TG-135-QA for robotic radiosurgery. Med Phys 36(6):2743, 2009. e-Pub 2009.
Lowenstein JR, Roll J, Ibbott G. Cervix brachytherapy dosimetry: Observed improvement in data submitted to clinical trials. Med Phys 36(6):2524, 2009. e-Pub 2009.
Followill DS, Lowenstein JR, Palmer L, Ibbott GS. The Radiological Physics Center's annual TLD machine calibration audit and its impact on clinical trials. Med Phys 36(6):2595, 2009. e-Pub 2009.
Followill D, Molineu A, Lowenstein J, Alvarez P, Aguirre J, Ibbott G. Quality audits of the calibration for TG-51 non-compliant beams by the Radiological Physics Center. Med Phys 35(6):2774, 2008. e-Pub 2008.
Molineu A, Lowenstein J, Hernandez N, Alvarez P, Followill D, Ibbott G. Has IMRT delivery improved in the last 5 years?. Med Phys 35(6):2762, 2008. e-Pub 2008.
Lowenstein J, Davis C, Roll J, Harris I, Followill D, Ibott G. The credentialing process for the NSABP B-39/RTOG 0413 partial breast irradiation trial. Med Phys 33(6):2140, 2006. e-Pub 2006.
Leif J, Roll J, Followill D, Ibbott G. The value of credentialing. Int J Radiat Oncol Biol Phys 66:S716, 2006. e-Pub 2006.
Followill D, Lowenstein J, Jhingran A, Roll J, Hernandez N, Ibbott G. The Radiological Physics Center’s anthropomorphic quality assurance phantom family: New developments. Med Phys 32(6):2129, 2005. e-Pub 2005.
Lowenstein J, Roll J, Ibbott G. Common dosimetry errors in cervix patients treated with brachytherapy on clinical trials. Med Phys 32(6):2107, 2005. e-Pub 2005.
Lowenstein J, Roll J, Davis C, Holguin P, Duong H, Followill D, Ibbott G. Credentialing requirements for NSABP B-39 / RTOG 0413. Med Phys 32(6):2020-2021, 2005. e-Pub 2005.
Followill D, Lowenstein J, Ibbott G. High-energy photon standard dosimetry data: A quality assurance tool. Med Phys 31:1782, 2004. e-Pub 2004.
Lowenstein J, Roll J, Ibbott G. To plan or not to plan: Multiple high dose rate (HDR) brachytherapy insertions. Med Phys 30:1464, 2003. e-Pub 2003.
Lowenstein J, Roll J, Hanson W, Davis D, Lanciano R, Calkins A, Petereit D, Varia M, Ibbott G. Radiotherapy quality assurance of gynecologic oncology group (GOG) protocol 165: A cooperative group study of carcinoma of the cervix. Int J Radiat Oncol Biol Phys 54(2):283, 2002. e-Pub 2002.
Balter P, Lowenstein J, Hanson W. Electron Calibrations: Parallel Plate Chambers vs. Cylindrical Chambers Using TG-51. Med Phys 28:1214, 2001. e-Pub 2001.
BenComo J, Followill D, Cho S, Balter P, Tailor R, Lowenstein J, Hernandez N, Hanson W. Comparison of on-site and off-site evaluations of dosimetry data. Proceedings of the 2000 World Congress on Medical Physics and Biomedical Engineering, IEEE, 2000. e-Pub 2000.
Lowenstein J, Balter P, Followill D, Hanson WF. Implementation of TG-51: Practical Considerations. Proceedings of the 2000 World Congress on Medical Physics and Biomedical Engineering, IEEE, 2000, 2000. e-Pub 2000.
Hanson W, Cho S, Lowenstein J. AAPM TG-51 Protocol for clinical reference dosimetry of high-energy photon and electron beams. Southwest Chapter of the American Association of Physicists in Medicine, 1999. e-Pub 1999.
Davis D, Followill D, Tailor R, Lowenstein J, Harris I, Roll J, Hanson W. Protocol pre-approval processes for radiotherapy treatment on clinical trials: The RPC experience. Med Phys 26:1159, 1999. e-Pub 1999.
Lowenstein J, Cho S, Balter P, Hanson W. Comparison between TG-51 and TG-21: The results of TG-51 beta testing. Med Phys 26:1154, 1999. e-Pub 1999.
BenComo J, Lowenstein J, Davis D, Davis C, Hanson W. Analysis of Radiological Physics Center remote tools program data. Med Phys 26:1161, 1999. e-Pub 1999.

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CV information above last modified July 22, 2026

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Jessica R.L. Leif, MS

Education & Training

Postgraduate Training

Licenses & Certifications

Experience & Service

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Other Professional Positions

Extramural Institutional Committee Activities

Honors & Awards

Professional Memberships

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National Presentations

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Selected Publications

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Review Articles

Professional Educational Materials

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