A. Sam Beddar, Ph.D.
1990, University of Wisconsin, Madison
UT M. D. Anderson Cancer Center
Radiation Physics
|
A. Sam Beddar, Ph.D. 1990, University of Wisconsin, Madison UT M. D. Anderson Cancer Center |
Research Interests: Radiation dosimetry; scintillation dosimetry; respiratory correlated imaging (4D-CT); image-guided radiotherapy
My current research interests are two-fold: patient dosimetry and respiratory-gated radiotherapy. In my laboratory we are investigating MOSFET- and scintillator-based radiation detectors, including their performance under different sources of radiation. We are also concentrating our efforts on designing plastic scintillation detectors for different applications, including in vivo (within a patient) and in vitro (within a phantom) dosimetry.
Secondly, I am quite interested in using respiration to improve the localization of liver tumors. We are using both 4D-CT and respiratory-gated radiotherapy to better account for the motion of liver tumors due to breathing.
A student tutorial would involve a small project related to one of these research areas. The student would have the opportunity to observe the application of such research in the clinic. Depending on the project, the student may become familiar with the operation of a linear accelerator, radiographic imaging, or radiation therapy treatment planning systems.
____________
Beddar AS , Mackie TR, and Attix FH (1992) Water-equivalent plastic scintillation detector for high-energy beam dosimetry: Part I, Physical characteristics and theoretical considerations. Phys Med Biol 37:1883-1900, 1992.
Archambault L, Arsenault J, Gingras L, Beddar AS, Roy R, Beaulieu L (2005) Plastic Scintillation Dosimetry: Optimal selection of scintillating fibers and scintillators, Med Phys 32:2271-2278.
Beddar AS (2006) Water equivalent plastic scintillation detectors in radiation therapy. Radiat Prot Dosimetry 120:1-6 (invited).
Archambault L, Beddar AS, Gingras L, Roy R, Beaulieu L (2007) Water-equivalent dosimeter array for small field external beam radiotherapy. Med Phys 34:1583-1592.
Briere TM, Lii J, Prado K, Gilin MT, Beddar AS (2006) Single-use MOSFET radiation dosimeters for the quality assurance of megavoltage photon beams. Phys Med Biol 51:1139-1144.
Briere TM, Gillin MT, Beddar AS (2007) Implantable MOSFET detectors: Evaluation of a new design. Med Phys 34:4585-4590.
Beddar AS, Kainz K, Briere TM, Tsunashima Y, Pan T, Prado K, Mohan R, Gillin M, Krishnan S (2007) Correlation between internal fiducial tumor motion and external marker motion for liver tumors imaged with 4D-CT. Int J Radiat Oncol Biol Phys 67:630-638.
Vedam S, Archambault L, Starkschall G, Mohan R, Beddar S (2007) Determination of prospective displacement-based gate threshold for respiratory-gated radiation delivery from retrospective phase-based gate threshold selected at 4D CT simulation. Med Phys 34:4247-4255.
Ballo MT, Zagars GK, Pollock RE, Benjamin RS, Feig BW, Cormier JN, Hunt KK, Patel SR, Trent JC, Beddar S, Pisters PW (2007) Retroperitoneal soft tissue sarcoma: An analysis of radiation and surgical treatment. Int J Radiat Oncol Biol Phys 67:158-163.
Beddar AS, Biggs PJ, Chang S, Ezzell GA, Faddegon BA, Hensley FW, Mills MD (2006) Intraoperative radiation therapy using mobile electron linear accelerators: Report of AAPM Radiation Therapy Committee Task Group No. 72. Med Phys 33:1476-1489.
Program Affiliation:
Program in Medical Physics