Skip to Content

'
David S. Followill, Ph.D.

Present Title & Affiliation

Primary Appointment

Chief, Section of Outreach Physics, Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX

Education & Training

Degree-Granting Education

1991 University of Texas Health Science Center, Graduate School of Biomedical Sciences, Houston, TX, PHD, Biophysics
1983 Texas A & M University, College Station, TX, MS, Nuclear Engineering (Health Physics Option)
1981 Texas A & M University, College Station, TX, BS, Radiation Protection Engineering

Postgraduate Training

7/1991-7/1992 Post-doctorate, The University of Texas MD Anderson Cancer Center, Department of Radiation Physics, Houston, TX, William Hanson, Ph.D.

Board Certifications

6/1995 American Board of Radiology, Therapeutic Radiological Physics

Experience/Service

Academic Appointments

Associate Professor, Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 9/2004-8/2011
Assistant Professor, Department of Radiation Physics, Division of Radiation Oncology, UT M. D. Anderson Cancer Center, Houston, TX, 9/1998-8/2004
Assistant Physicist, Department of Radiation Physics, Division of Radiation Oncology, UT M. D. Anderson Cancer Center, Houston, TX, 8/1992-9/1998
Post-doctorate, Department of Radiation Physics, Division of Radiation Oncology, UT M. D. Anderson Cancer Center, Houston, TX, 8/1991-8/1992
Predoctoral Fellow, Department of Experimental Radiotherapy, UT M. D. Anderson Cancer Center, Houston, TX, 8/1985-8/1991
Senior Research Assistant, Department of Radiation Physics, Division of Radiation Oncology, UT M. D. Anderson Cancer Center, Houston, TX, 6/1985-9/1985
Radiation and Health Safety Coordinator, Texas Tech University, Lubbock, TX, 6/1983-5/1985
Health Physicist, Texas A & M University, College Station, TX, 9/1981-5/1983
Radiation Safety Technician, Texas A & M University, College Station, TX, 10/1979-9/1981

Administrative Appointments/Responsibilities

Deputy Section Chief, Section of Outreach Physics, Department of Radiation Physics, Division of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 12/2009-10/2010
Faculty Senator, The University of Texas MD Anderson Cancer Center, Houston, TX, 2006-2009
Full Member, GSBS Faculty, The University of Texas MD Anderson Cancer Center, Houston, TX, 2004-present
Faculty Senator, UT M. D. Anderson Cancer Center, Houston, TX, 2000-2003
Associate Member of GSBS Faculty, UT M. D. Anderson Cancer Center, Houston, TX, 1999-2004
Assistant Director, Radiation Physics - Outreach, Radiological Physics Center, Division of Radiation Oncology, UT M. D. Anderson Cancer Center, Houston, TX, 1994-2001

Other Appointments/Responsibilities

Voting Member, Review and Extension of Beam Quality Conversion Factors for TG-51 Protocol, American Association of Physicists in Medicine, College Park, MD, 3/2012-12/2014
Member, Task Group 158 - Measurements and calculations of doses outside the treatment volume from External Beam Radiation Therapy, American Association of Physicists in Medicine, N/A, 2007-present
Member, Accredited Dosimetry Calibration Laboratory Subcommittee, American Association of Physicists in Medicine, College Park, MD, 2007-2012
Member, Task Group 129 - Eye Plaque Dosimetry, American Association of Physicists in Medicine, College Park, MD, 2006-present
Member, Task Group 148 - Quality Assurance for Helical Tomotherapy, American Association of Physicists in Medicine, College Park, MD, 2006-present
Member, Committee 3 Task Group - Radiation Protection Issues of Modern Radiotherapy Techniques, International Commission on Radiological Protection, Stockholm, Sweden, 2006-present
Member, Therapy Physics Commitee, Subcommittee on Treatment Planning Systems and Dosimetry, American Association of Physicists in Medicine, College Park, MD, 2005-present
Member, Image Guided Radiation Therapy Committee, Radiation Therapy Oncology Group, Philadelphia, PA, 2001-present
Member, Task Group 71 - Monitor Unit Calculations for Photon and Electron Beam Radiotherapy, American Association of Physicists in Medicine, College Park, MD, 2001-present
Member, Task Group 70 - TG-25 Revision for Electron Beam Dosimetry, American Association of Physicists in Medicine, College Park, MD, 2001-2009
Member, Executive Committee, QA Committee, Collaborative Ocular Melanoma Study (NCI, NEI), Baltimore, MD, 2001-2006
Member, Physics Committee, American Society for Therapeutic Radiology and Oncology, Fairfax, VA, 2000-2005
Member, Task Group 67 - Benchmark Data Set, American Association of Physicists in Medicine, College Park, MD, 2000-2003
Member, Steering Committee, Age-Related Member Degeneration Radiation Trial Research Group, Philadelphia, PA, 1998-2002
Member, Quality Assurance Group, Age-Related Member Degeneration Radiation Trial Research Group, Philadelphia, PA, 1998-2002
Ex-officio Member, Radiation Oncology Committee, National Surgical Adjuvant Breast Project, Pittsburgh, PA, 1998-2001
Ex-officio Member, Radiation Oncology Committee, Children’s Cancer Group, Houston, TX, 1995-present

Consultantships

Consultant, Project "Development of Methodology for Dosimetry Audits of Irregular MLC Shaped Fields", International Atomic Energy Agency, Vienna, Austria, 6/2009
Organizer, Project "Program Committee for 2010 International Symposium on Standards, Applications and QA in Radiation Dosimetry", International Atomic Energy Agency, Vienna. Austria, 2/2009
Consultant, Project, "Quality Audits for Complex Treatment Techniques", International Atomic Energy Agency, Vienna, Austria, 9/2008
Consultant, Project "Finalizing the Document for Resolving Discrepancies in Clinical Dosimetry, International Atomic Energy Agency, Vienna, Austria, 11/2005-12/2005
Consultant, Project “Development of a TLD based quality audit programme for radiotherapy dosimetry in non-reference conditions”, International Atomic Energy Agency, Vienna, Austria, 6/2001
Consultant, Project “Development of procedures for dosimetry review visits at radiotherapy hospitals”, International Atomic Energy Agency, Vienna, Austria, 9/1999-10/1999
Consultant, Project “Development of procedures for resolving discrepancies identified in the TLD dose quality audit programme”, International Atomic Energy Agency, Vienna, Austria, 12/1997

Institutional Committee Activities

Member, Continuing Medical Education Advisory Committee, 2000-present
Member, Medical Physics Program Steering Committee, 2000-present
Member, Faculty Senate Education Committee, 2000-2003

Honors and Awards

2006 AAPM Fellow Award, AAPM
2004 JACMP PTW Award for Excellence, JACMP
2003 JACMP LAP Award for Excellence, JACMP
2002-2003 GSBS Dean’s Excellence Award, UT M. D. Anderson Cancer Center, GSBS
1987-1988 Rosalie B. Hite Fellowship, UT M. D. Anderson Cancer Center, GSBS
1981 Graduated Magna Cum Laude, Texas A&M University
1980 Nuclear Engineering Honor Society, Sigma Nu Epsilon, Texas A&M University
1978-1981 Dean's Honor List, Texas A&M University
1978 Freshman Men's Honor Society, Phi Eta Sigma, Texas A&M University

Professional Memberships

American Association of Physicists in Medicine
Member, 1991-present
American Association of Physicists in Medicine, Southwest Chapter
Member, 1991-present
American Brachytherapy Society
Member, 2002-2003
American College of Medical Physics
Member, 1992-2002
American Society of Therapeutic Radiologists and Oncologists
Member, 2000-present
Health Physics Society, South Texas Chapter
Member, 1984-present
National Health Physics Society
Member, 1984-present
Radiation Research Society
Member, 2006-2007
Texas Tech University Graduate School, Lubbock, TX
Adjunct Graduate Faculty Member, 2/2009-present

Selected Publications

Peer-Reviewed Original Research Articles

1. Followill DS, Urie MM, Galvin JM, Ulin K, Xiao Y, Fitzgerald T. Credentialing for participation in clinical trials. Frontiers in Radiation Oncology. In Press.
2. Chiu-Tsao ST, Astrahan MA, Finger PT, Followill DS, Meigooni AS, Melhus CS, Mourtada F, Napolitano ME, Nath R, Rivard MJ, Rogers DW, Thomson RM. Dosimetry of (125)I and (103)Pd COMS eye plaques for intraocular tumors: Report of Task Group 129 by the AAPM and ABS. Med Phys 39(10):6161-84, 10/2012. PMID: 23039655.
3. Jhaveri PM, Sun Z, Ballas L, Followill DS, Hoffman KE, Jiang J, Smith BD. Emergence of Integrated Urology-Radiation Oncology Practices in the State of Texas. Int J Radiat Oncol Biol Phys 84(1):15-19, 9/1/2012. e-Pub 7/10/2012. PMID: 22789491.
4. Scarboro SB, Followill DS, Kerns JR, White RA, Kry SF. Energy response of optically stimulated luminescent dosimeters for non-reference measurement locations in a 6 MV photon beam. Phys Med Biol 57(9):2505-15, 5/7/2012. e-Pub 4/11/2012. PMID: 22493180.
5. Han T, Mourtada F, Kisling K, Mikell J, Followill D, Howell R. Experimental validation of deterministic Acuros XB algorithm for IMRT and VMAT dose calculations with the Radiological Physics Center's head and neck phantom. Med Phys 39(4):2193-202, 4/2012. PMCID: PMC3337663.
6. Neubauer E, Dong L, Followill DS, Garden AS, Court LE, White RA, Kry SF. Assessment of shoulder position variation and its impact on IMRT and VMAT doses for head and neck cancer. Radiat Oncol 7:19, 2012. e-Pub 2/2012. PMCID: PMC3311611.
7. Kry SF, Popple R, Molineu A, Followill DS. Ion recombination correction factors (Pion) for Varian TrueBeam high-dose-rate therapy beams. J Appl Clin Med Phys 13(6):3803, 2012. e-Pub 11/8/2012. PMID: 23149774.
8. 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 8/8/2012. PMID: 22955664.
9. Pulliam KB, Howell RM, Followill D, Luo D, White RA, Kry Sf. The clinical impact of the couch top and rails on IMRT and arc therapy. Physics in Medicine and Biology 56(23):7435-47, 11/2011. PMID: 22056949.
10. Kerns JR, Kry SF, Sahoo N, Followill DS and Ibbott GS. Angular dependence of the nanoDot OSL dosimeter. Med Phys 38(7):3955-3962, 7/2011. PMCID: PMC3133805.
11. Scarboro S, Followill DS, Howell RM, Kry SF. Variations in Photon Energy Spectra of a 6 MV Beam and Their Impact on TLD Response. Med Phys 38(5):2619-2628, 2011. PMCID: PMC3107829.
12. Langen KM, Papanikolaou N, Balog J, Crilly R, Followill D, Goddu SM, Walter III W, Olivera G, Ramsey C, Shi C. QA for helical tomotherapy: Report of the AAPM Task Group 148. Med Phys 37(8), 8/2010.
13. Benedict S, Yenice K, Followill D, Galvin J, Hinson W, Kavanagh B, Keall P, Lovelock M, Meeks S, Papiez L, Purdie T, Sadagopan R, Schell M, Salter B, Schlesinger D, Shiu A, Solberg T, Song D, Stieber V, Timmerman R, Tome W, Verellen D, Wang L, Yin F. Stereotactic Body Radiation Therapy: The Report of AAPM Task Group 101. Med Phy 37(7):1-24, 2010.
14. Homann Kl, Gates BE, Salehpour M, Followill DS, Kirsner SM, White RA, Buchholz TA, Prado KL. Use of a matchline dosimetry analysis tool (MDAT) to quantify dose homogeneity in the region between abutting tangential and supraclavicular radiation fields. J Appl Clin Med Phys 11(4):206-221, 2010.
15. Vinogradskiy Yevgeniy, Balter Peter, Followill David S, Alvarez Paola E, White R Allen, Starkschall George. Comparing the accuracy of four-dimensional photon dose calculations with three-dimensional calculations using moving and deforming phantoms. Med. Phys. 36(11):5000-7, 11/2009.
16. Gerbi BJ, Antolak JA, Deibel FC, Followill DS, Herman MG, Higgins PD, Huq MS, Mihailidis DN, Yorke ED, Hogstrom KR, Khan FM. Recommendations for Clinical Electron Beam Dosimetry: Supplement to the Recommendations of Task Group 25. Med Phys 36:3239-79, 7/2009.
17. Kry SF, Howell RM, Salehpour M, Followill DS. Neutron spectra and dose equivalents calculated in tissue for high-energy radiation therapy. Med Phys 36(4):1244-1247, 4/2009.
18. Howell RM, Kry SF, Burgett E, Followill D, Hertel NE. Effects of tertiary MLC configuration on secondary neutron spectra from 18 MV x-ray beams for the Varian 21EX linear accelerator. Med Phys 36(9):4039-46, 2009.
19. Kry SF, Salehpour M, Titt U, White RA, Stovall M, Followill D. Monte Carlo study shows no significant difference in second cancer risk between 6- and 18-MV intensity-modulated radiation therapy. Radiotherapy and Oncology 91:132-137, 2009.
20. Howell RM, Kry SF, Burgett E, Hertel NE, Followill DS. Secondary neutron spectra from modern Varian, Siemens, and Elekta linacs with multileaf collimators. Med Phys 36(9):4027-38, 2009. PMCID: PMC2738742.
21. Vinogradskiy YY, Balter P, Followill DS, Alvarez PE. Verification of four-dimensional photon dose calculations. Med Phys 36(8):3438-47, 2009.
22. Davidson S, Cui J, Followill D, Ibbott G, Deasy J. A flexible Monte Carlo tool for patient or phantom specific calculations: comparison with preliminary validation measurements. Journal of Physics: Conference Series 102, 2008.
23. 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. PMCID: PMC2409281.
24. Davidson SE, Popple RA, Ibbott GS, Followill DS. Technical Note: Heterogeneity dose calculation accuracy in IMRT: Study of the commercial treatment planning systems using an anthropomorphic thorax phantom. Med Phys 35:5434-5439, 2008. PMCID: PMC2832070.
25. Kry SF, Titt U, Followill D, Ponisch F, Vassiliev ON, White RA, Stovall M, Salehpour M. A Monte Carlo model for calculating out-of-field dose from a high-energy photon therapy. Med Phys 34 (9)(11):3489-3499, 9/2007. PMID: 17153419.
26. Mann AL, Kim JE, Aberg T, Blair NP, Dierner-West M, Followill D, Gilson MM, Olsen KR, Hawkins BS. Incidence of cataract and outcomes after cataract surgery in the first 5 years after 125I brachytherapy in the COMS: COMS report No. 27. Opthalmology 114, Issue 7:1363-1371, 7/2007.
27. Kry SF, Followill D, White RA, Stovall M, Kuban D, Salehpour M. Uncertainty of calculated risk estimates for secondary malignancies after radiotherapy. Int J Radiat Oncol Biol Phys 68:1265-1271, 4/2007.
28. Followill D, Evans-Radford D, Cherry C, Molineu A, Fisher G, Hanson WF, Ibbott G. Design, Development, and Implementation of the Radiological Physics Center's Pelvis and Thorax Anthropomorphic Quality Assurance Phantoms. Med Phys 34:2070-6, 2007.
29. Ibbott GS, Molineu A, Followill DS. Independent evaluations of IMRT through the use of an anthropomorphic phantom. Technol Cancer Res Treat 5(5):481-7, 10/2006. PMID: 16981790.
30. Molineu A, Followill DS, Balter PA, Hanson WF, Gillin MT, Huq MS, Eisbruch A, Ibbott GS. Design and implementation of an anthropomorphic quality assurance phantom for intensity-modulated radiation therapy for the Radiation Therapy Oncology Group. Int J Radiat Oncol Biol Phys 63(2):577-83, 10/2005. PMID: 16168849.
31. Kry SF, Salehpour M, Followill DS, Stovall M, Kuban DA, White RA, Rosen II. Out-of-field photon and neutron dose equivalents from step-and-shoot intensity-modulated radiation therapy. Int J Radiat Oncol Biol Phys 62(4):1204-16, 7/2005. PMID: 15990026.
32. Kry SF, Salehpour M, Followill DS, Stovall M, Kuban DA, White RA, Rosen II. The calculated risk of fatal secondary malignancies from intensity-modulated radiation therapy. Int J Radiat Oncol Biol Phys 62(4):1195-1203, 7/2005. PMID: 15990025.
33. Marcus DM, Peskin E, Maguire M, Weissgold D, Alexander J, Fine S, Followill D. The age-related macular degeneration radiotherapy trial (AMDRT): one year results from a pilot study. Am J Ophthalmol 138(5):818-28, 11/2004. PMID: 15531318.
34. Followill DS, Davis DS, Ibbott GS. Comparison of electron beam characteristics from multiple accelerators. Int J Radiat Oncol Biol Phys 59(3):905-10, 7/2004. PMID: 15183494.
35. Olch AJ, Followill D, Thomadsen B, Wichman B, Rosemark P, Hunt M. In regard to Urie et al. current calibration treatment, and treatment planning techniques among institutions participating in the Children's Oncology Group. IJROBP 2003;55:245-260. Int J Radiat Oncol Biol Phys 56(4):1209-10, 7/15/2003. PMID: 12829169.
36. Krintz AL, Hanson WF, Ibbott GS, Followill DS. A reanalysis of the Collaborative Ocular Melanoma Study Medium Tumor Trial eye plaque dosimetry. Int J Radiat Oncol Biol Phys 56(3):889-98, 7/2003. PMID: 12788199.
37. Nag S, Quivey JM, Earle JD, Followill D, Fontanesi J, Finger PT. The American Brachytherapy Society recommendations for brachytherapy of uveal melanomas. Int J Radiat Oncol Biol Phys 56(2):544-55, 6/2003. PMID: 12738332.
38. Diener-West M, Albert DM, Frazier Byrne Sl, Davidorf FH, Followill DS, Green RL, Hawkins BS, Kaiser PK, Robertson DM, Straatsma BR. Comparison of Clinical, Echographic and Histopathologic Measurements from Eyes with Medium-Sized Choroidal Melanoma: in the Collaborative Ocular Melanoma Study. Archives of Ophthalmology 121:1163-1171, 2003.
39. Urie M, FitzGerald TJ, Followill D, Laurie F, Marcus R, Michalski J. Current calibration, treatment, and treatment planning techniques among institutions participating in the Children's Oncology Group. Int J Radiat Oncol Biol Phys 55(1):245-60, 2003. PMID: 12504059.
40. Followill DS, Hanson WF, Ibbott GS, Eglezopoulos LR, Chui CS. Differences in electron beam dosimetry using two commercial ionization chambers and the TG-21 protocol: another reason to switch to TG-51. J Appl Clin Med Phys 4(2):124-31, 2003. PMID: 12777147.
41. Followill DS, Stovall MS, Kry SF, Ibbott GS. Neutron source strength measurements for Varian, Siemens, Elekta, and General Electric linear accelerators. J Appl Clin Med Phys 4(3):189-94, 2003. PMID: 12841788.
42. Tailor RC, Followill DS, Hernandez N, Ibbott GS, Hanson WF. Predictability of electron cone ratios with respect to linac make and model. J Appl Clin Med Phys 4(2):172-8, 2003. PMID: 12777153.
43. Ibbott GS, Nelson A, Followill DS, Balter P, Hanson WF. An Anthropomorphic Head and Neck Phantom for Evaluation of Intensity Modulated Radiation Therapy. Standards and Codes of Practice in Medical Radiation Dosimetry, Proceedings of an International Symposium, Vienna 2:209-217, 11/2002.
44. Gifford KA, Followill DS, Liu HH, Starkschall G. Verification of the accuracy of a photon dose-calculation algorithm. J Appl Clin Med Phys 3(1):26-45, 2002. PMID: 11818002.
45. Followill D, Stovall M. Tinea capitis: uncertainties in radiation dose estimates. Radiat Res 154(6):720-1;discussion 723-4, 12/2000. PMID: 11187008.
46. Followill DS, Tailor RC, Tello VM, Hanson WF. An empirical relationship for determining photon beam quality in TG-21 from a ratio of percent depth doses. Med Phys 25(7 Pt 1):1202-5, 7/1998. PMID: 9682206.
47. Tailor RC, Chu C, Followill DS, Hanson WF. Equilibration of air temperature inside the thimble of a Farmer-type ion chamber. Med Phys 25(4):496-502, 4/1998. PMID: 9571617.
48. Tailor RC, Followill DS, Hanson WF. A first order approximation of field-size and depth dependence of wedge transmission. Med Phys 25(2):241-4, 2/1998. PMID: 9507486.
49. Tailor RC, Followill DS, Hanson WF. A generic approach for field-size and depth dependence of central-axis wedge transmission. Med Phys 25:241-4, 1998.
50. Followill DS, Davis DS, Hanson WF. TG-21 versus TG-25: a comparison for electrons. Med Phys 24(7):1117-21, 7/1997. PMID: 9243474.
51. Followill D, Geis P, Boyer A. Estimates of whole-body dose equivalent produced by beam intensity modulated conformal therapy. Int J Radiat Oncol Biol Phys 38(3):667-72, 6/1997. PMID: 9231693.
52. Followill DS, Travis EL. Differential expression of collagen types I and III in consequential and primary fibrosis in irradiated mouse colon. Radiat Res 144(3):318-28, 12/1995. PMID: 7494876.
53. Followill DS, Kester D, Travis EL. Histological changes in mouse colon after single- and split-dose irradiation. Radiat Res 136(2):280-8, 11/1993. PMID: 8248486.
54. Newman RA, Siddik ZH, Travis EL, Followill D, Ayele W, Burditt T, Krakoff IH. Assessment of pulmonary and hematologic toxicities of liblomycin, a novel bleomycin analog. Invest New Drugs 8(1):33-41, 2/1990. PMID: 1693138.

Invited Articles

1. Michalski J, Purdy JA, Gaspar L, Souhami L, Ballow M, Bradley J, Chao CKS, Crane C, Eisbruch A, Followill D, Forster K, Fowler J, Gillin MT, Graham ML, Harms WB, Huq S, Kline RW, Langer M, Mackie TR, Mukherji S, Podgorsak EB, Roach M Ryu J, Sandler H, Schultz CJ, Schell M, Verhey LJ, Vicini F, Winter KA. Image-Guided Radiation Therapy Committee. Int. J. Radiation Oncology Biol. Phys 51:60-65, 2001.
2. Greven KM, Levenback C, Chao CK, Delaney T, Del Priore G, Eifel P, Erickson BA, Followill D, Gaffney D, Garcia M, Gerszten K, Grigsby P, Henderson R, Hricak H, Hsu J, Jhingrin A, Kaye A, Kudelka A, Lukka H, Mutch D, Nag S, Rotman M, Shefter T, Smith W, Stehman F, Souhami L, Wenzel L, Winter KA, Wolfson A. Radiation Therapy Oncology Group. Research Plan 2002-2006. Gynecology Cancer Working Group. Int J Radiat Oncol Biol Phys 51(3 Suppl 2):58-9, 2001. PMID: 11641017.

Abstracts

1. Cui J, Davidson S, Willcut V, El Naqa I, Followill D, Ibbott G, Deasey J. Comparisons of a Monte Carlo IMRT Plan Recalculation Results with the Pinnacle Treatment Planning System. Medical Physics 35(6):2759, 6/2008.
2. Vinogradskiy Y, Starkschall G, Balter P, Followill D. Deformable Lung Phantom for Verification of 4D Dose Calculations. Medical Physics 35(6):2791, 6/2008.
3. Molineu A, Lowenstein J, Hernandez N, Alvarez P, Followill D, Ibbott G. Has IMRT Delivery Improved in the Last 5 Years?. Medical Physics 35(6):2762, 6/2008.
4. Heard M, Followill D, White R, Jackson E, Salehpour M, Ibbott G. Identification of a 3D Dosimeter Best-Suited for Use by the RPC. Medical Physics 35(6):2889, 6/2008.
5. Wang Z, Kry S, Burgett E, Howell R, Tailor R, Oliver J, Followill D, Smith A, Salehpour M. Measurement of Neutron Spectrum and Ambient Dose Equivalent Around a Mini-Phantom at a Proton Therapy Facility. Medical Physics 35(6):2982, 6/2008.
6. Xu XG, Followill D. Out-of-Field Dosimetry for Secondary Cancer Studies: Past Experience and Future Needs. Medical Physics 35(6):2857, 6/2008.
7. Followill D, Molineu, Lowenstein J, Alvarez P, Aguirre J, Ibbott G. Quality Audits of the Calibration for TG-51 Non-Compliant Beams by the Radiological Physics Center. Medical Physics 35(6):2774, 6/2008.
8. Bellon M, Followill D, Ibbott G, White R, Salehpour M, Mahajan A, Kry S Ding C. Risk of Secondary Fatal Malignancies from Cyberknife Radiosurgery. Medical Physics 35(6):2983, 6/2008.
9. Price M, Eifel P, Gifford K, Zhang M, Followill D, Gillin M, Mourtada F. The Imaging and Dosimetric Capabilities of a Novel CT/MR-Suitable, Anatomically Adaptive, Shielded HDR/PDR Intracavitary Brachytherapy Applicator for the Treatment of Cervical Cancer. Medical Physics 35(6):2855, 6/2008.
10. Davidson S, Cui J, Deasy J, Ibbott G, Followill D. Verification of a Monte Carlo-Based Source Model for a Varian 10 MV Photon Beam. Medical Physics 35(6):2804, 6/2008.
11. Cui J, Davidson S, Lindsay P, Followill D, El Naqa I, Deasy J. A Comparison of DPM and VMC++ Monte Carlo Codes Applied to Heterogeneous Media. Medical Phyiscs 33(6):2591, 6/2007.
12. Alvarez P, Molineu A, Hernandez N, Hall F, Followill D, Ibbott G. A Comparison of Heterogeneity Correction Algorithms. Medical Physics 33(6):2888, 6/2007.
13. Kry S, Salehpour M, Titt U, Stovall M, White R, Followill D. A Monte Carlo Study of the Out-Of-Field Dose from IMRT. Medical Physics 33(6):2406, 6/2007.
14. Khullar D, Molineu A, Followill D, Bosch W, Willcut V, Simpson T, Ju T, Deasy J. An Open-Source Software Tool to Support Film-Based IMRT Quality Assurance. Medical Physics 6(33):2418, 6/2007.
15. Nitsch P, Ibbott G, Dieterich S, Followill D. Assessment of CyberKnife’s Heterogeneity Dose Calculation Algorithm and Respiratory Tracking System Using an Anthropomorphic Thorax Phantom. Medical Physics 33(6):2641, 6/2007.
16. Davidson S, Cui J, Followill D, Ibbott G, Deasy J. Benchmarking a Flexible Monte Carlo (MC) Tool Based on the Dose Planning Method (DPM) for Use in Evaluating IMRT Treatment Planning Systems. Medical Physics 33(6):2574, 6/2007.
17. Bivens W, Ibbott G, Maryanski M, Heard M, Followill D, Zhu X. Linear Energy Transfer (LET) Dependence of Bang® Polymer Gel Dosimeters in Proton Beams. Medical Physics 33(6):2467, 6/2007.
18. Kry S, Followill D, Salehpour M. Neutron Dose Equivalent at Depth in a Phantom. Medical Physics 33(6):2474, 6/2007.
19. Lazar S, Followil D, Gibbons J, Mahajan A, Salehpour M, Stoval M, White R. Risk of Secondary Fatal Malignancies from Hi-Art Tomotherapy IMRT. Medical Physics 33(6):2591, 6/2007.
20. Davidson S, Popple R, Ibbott G, Followill D. A Comprehensive Study on the Heterogeneity Dose Calculation Accuracy in IMRT using an Anthropomorphic Thorax Phantom. Medical Physics, 2007.
21. Alvarez P, Hernandez N, Followill D, Tailor R, Ibbott G. Characterization of EBT versus MD55 gafchromic® films for relative dosimetry measurements. Medical Physics 33:2217-18, 2006.
22. Hecox R, Gibbons J, Followill D, Ibbott G. Dose calculation accuracy in the presence of high-z materials using megavoltage CT for treatment planning. Medical Physics 33:2087-88, 2006.
23. Alvarez P, Molineu A, Hernandez N, Followill D, Ibbott G. Evaluation of heterogeneity corrections algorithms through the irradiation of a lung phantom. Medical Physics 33:2214, 2006.
24. Davidson S, Prado K, Ibbott G, Followill D. Hetergeneity dose calculation accuracy in IMRT using an anthropomorphic thorax phantom. Medical Physics 33:2106, 2006.
25. Howell R, Kry S, Followill D, Hertel N, Wang Z, Salehpour M. Investigation of MLC effects on secondary neutron spectra for Varian, Siemens, and Elekta. Medical Physics 33:2249-50, 2006.
26. Simon W, Kozelka J, Rose M, Liu C, Palta J, Dempsey J, Lynch B, Bayouth J, Pavord D, Ibbott G, Followill D. LINAC dosimetry: benchmark data set uncertainty. Medical Physics 33:2118, 2006.
27. Followill D, Kry S, Salehpour M. Measurements of secondary radiation for electron and proton accelerators. Medical Physics 33:2238-39, 2006.
28. Lowenstein J, Davis C, Roll J, Harris I, Hall F, Followill D, Ibbott G. The credentialing process for the NSABP B-39/RTOG 0413 partial breast irradiation trial. Medical Physics 33:2140, 2006.
29. Followill D, Molineu A, Alvarez P, Ibbott G. The state of radiotherapy physics through the eyes of a quality auditor. Medical Physics 33:2283, 2006.
30. Kry S, Followill D, White R, Salehpour M. Uncertainty analysis of risk of secondary fatal malignancies from radiotherapy treatments including IMRT. Medical Physics 33:2257, 2006.
31. Kry S, Titt U, Poenisch F, Followill D, Vassiliev O, Mohan R, Salehpour M. A Monte Carlo Simulation of Out-Of-Field Radiation From An 18-MV Beam. Medical Physics 32:1889, 2005.
32. Followill D, Molineu A, McGary J, Ibbott G. Clinical Reference Dosimetry of a "Hi-Art II" Helical Tomotherapy Machine. Medical Physics 32:2089, 2005.
33. Lowenstein J, Roll J, Davis C, Holguin P, Duong H, Followill D, Ibbott G. Credentialing Requirements for NSABP B-39 / RTOG 0413. Medical Physics 32:2020-21, 2005.
34. Shoales J, Followill D, Ibbott G, Balter P, Tolani N. Development of An Independent Audit Device for Remote Verification of 4D Radiotherapy. Medical Physics 32:2128, 2005.
35. Alvarez P, Molineu A, Hernandez N, Followill D, Ibbott G. Evaluation of Doses Delivered by SBRT to the Lung of An Anthropomorphic Thorax Phantom. Medical Physics 32:2043, 2005.
36. Homann K, Gates B, Salehpour M, Followill D, Kirsner S, Buchholz T, White R, Prado K. Evaluation of the Dose Within the Abutment Region Between Tangential and Supraclavicular Fields for Various Breast Irradiation Techniques. Medical Physics 32:1995, 2005.
37. Followill D, Molineu A, McGary J, Hernandez N, Ibbott G. Evaluation of the TomoTherapy Planning Station Heterogeneity Correction Algorithm Using An Anthropomorphic Phantom. Medical Physics 32:2167, 2005.
38. Molineu A, Hernandez N, Alvarez P, Followill D, Ibbott G. IMRT Head and Neck Phantom Irradiations: Correlation of Results with Institution Size. Medical Physics 32:1983-84, 2005.
39. Davidson S, Followill D, Ibbott G, Prado K. The Evaluation of Several Commercial IMRT Treatment Planning Systems Heterogeneity Dose Calculation Algorithms Using An Anthropomorphic Thorax Phantom. Medical Physics 32:1988, 2005.
40. Followill D, Lowenstein J, Jhingran A, Roll J, Hernandez N, Ibbott G. The Radiological Physics Center’s Anthropomorphic Quality Assurance Phantom Family: New Developments. Medical Physics 32:2129, 2005.
41. Alvarez P, Molineu A, Hernandez N, Followill D, Balter P, Hanson W, Ibbott G. Anthropomorphic Phantoms for Quality Assurance in Radiation Therapy. Medical Physics 31:1732, 2004.
42. Molineu A, Alvarez P, Hernandez N, Followill D, Ibbott G. Evaluation of 60 IMRT Irradiations of An Anthropomorphic H&N Phantom. Medical Physics 31:1822-3, 2004.
43. Molineu A, Alvarez P, Hernandez N, Followill DS, Ibbott GS. Evaluation of IMRT for Institutions Participating in NCI Sponsored Clinical Trials. International Journal of Radiation Oncology Biology Physics 60:S319, 2004.
44. Followill D, Lowenstein J, Ibbott G. High-Energy Photon Standard Dosimetry Data: A Quality Assurance Tool. Medical Physics 31:1782, 2004.
45. Urie M, Ulin K, Followill D, Ibbott G, Olch A, Palta J, Purdy J. Results and Analysis by QARC of the IMRT Benchmark Required by the NCI for Participation in Clinical Trials. Medical Physics 31:1915-6, 2004.
46. Fisher G, Followill D, Ibbott G. The Accuracy of 3-D Inhomogeneity Photon Algorithms in Commercial Treatment Planning Systems Using a Heterogeneous Lung Phantom. Medical Physics 31:1714, 2004.

Book Chapters

1. Followill DS,. Chapter 8: Clinical Implementation of the TG-51 Calibration Protocol. In: Clinical Dosimetry Measurements in Radiotherapy. Medical Physics Publishing, 2009.
2. Olch A, Kline R, Ibbott G, Followill D, Anderson J, Deye J, Fitzgerald T, Gillin M, Huq S, Palta J, Purdy J, Urie M. Quality Assurance for Clinical Trials: A Primer for Physicists. In: AAPM Report No. 86. Medical Physics Publishing, 37-44, 2004.
3. Followill DS. Radiation Dosimetry Quality Assurance of Radiotherapy Facilities. In: Proceedings of the 1st Summer School of the Latin-American Association of Physicists in Medicine (ALFIM) and the AAPM International Affairs Subcommittee for Latinamerica. University of Chicago, IL, 2000.

Books (edited and written)

1. Chavaudra J, Dutreix A, Followill DS, Georg D, Hanson W, Izewska J, Jarvinen H, Johansson KA, Mijnheer BJ, Nisbet A, Novotny J, Rosenwald JC, Sernbo G, Sipila P, Shortt K, Thwaites D, Van Dam J, Vatnitsky S, Venselaar J, Winkler P. On-site Visits to Radiotherapy Centres: Medical Physics Procedures. IAEA-TECDOC-1543. International Atomic Energy Agency: Vienna, Austria, 2007.

Letters to the Editor

1. Followill DS, Nusslin F, Orton CG. IMRT should not be administered at photon eneriges greater than 10 MV. Med. Phys. 34, Issue 6:1877-1879, 6/2007.
2. Olch A, Followill D, Thomadsen B, Wichman B, Rosemark P, Hunt M. In regard to Urie et al. Current calibration, treatment, and treatment planning techniques among institutions participating in the children'’ oncology group. Int. J., Radiation Oncology Biol. Phys 56:1209-10, 2003.

Manuals, Teaching Aids, Other Teaching Publications

1. Followill D, Lowenstein J, Ibbott G. Quality Assurance: It’s here to stay. AAPM Newsletter, January/February, 2003.
2. Hanson W, Followill D. TG-51 Recommendations. AAMP Newsletter, January/February, 2000.
3. Followill D. There’s Change in the Air (TG-21 to TG-51). AAPM Newsletter, January/February, 2000.
4. Followill D, Hanson W. Brachytherapy source strengths: A safety issue revisited. AAPM Newsletter, January/February, 8, 1997.
5. Followill D, Tailor R, Hanson W. Wedge Transmission, A change in RPC Policy. AAPM Newsletter, September/October, 5-6, 1994.

Grant & Contract Support

Title: Extension and Expansion of a Vendor Services Agreement Centralized QA for CEL-SCI Study CS001P3
Funding Source: PharmaNet, LLC
Role: Significant Contributor
Principal Investigator: Leif
Duration: 11/1/2012 - 10/31/2014
 
Title: Radiological Physics Center
Funding Source: NIH/NCI
Role: Principal Investigator
Duration: 1/1/2011 - 12/31/2013
 
Title: Prediction of 2nd Cancer Risks for Children Treated with Proton vs. Photon Beam Therapy
Funding Source: NIH/NCI
Role: Collaborator
Principal Investigator: Wayne Newhauser, Ph.D.
Duration: 9/5/2008 - 7/31/2010
 
Title: Advanced Technology Radiation Therapy Quality Assurance Review Consortium
Funding Source: Washington University
Role: Principal Investigator-MDACC
Duration: 7/1/2007 - 6/30/2013
 
Title: Benchmark Beam Data: Improved Accuracy in Radiotherapy
Funding Source: Sun Nuclear Corporation
Role: Co-Investigator
Principal Investigator: Geoffrey Ibbott, Ph.D.
Duration: 7/1/2006 - 6/30/2008
 
Title: Centralized radiotherapy quality assurance for AMGEN
Funding Source: Amgen, Inc.
Role: Principal Investigator
Duration: 12/6/2001 - 10/31/2003
 
Title: Physics Center for Collaborative Ocular Melanoma Study
Funding Source: NIH/NCI
Role: Principal Investigator
Duration: 8/1/2000 - 7/31/2004

Last updated: 8/29/2013