Radiation Physics
Choonik Lee, PhD, DABR
Clinical Instructor & Associate Director of Medical Physics Residency Program
Choonik Lee, PhD, DABR:
Clinical Instructor and Associate Director of Medical Physics Residency Program
Biography
Dr. Lee joined our department in 2009 as a clinical faculty member after finishing his training at the M. D. Anderson Cancer Center Orlando. He is a board-certified therapeutic radiologic physicist by the American Board of Radiology and also an authorized medical physicist in High Dose Rate (HDR) brachytherapy by the U.S. Nuclear Regulatory Commission (NRC). He is actively involved in various clinical services including brachytherapy and image-guided external radiation therapy. He is the lead physicist for a very active ocular brachytherapy program. Dr. Lee also serves as an associate director of the department’s medical physics residency program. He also provides physics support for various on-going departmental research projects.
Clinical Services
- Brachytherapy -- Performs and supervises planning, quality assurance of the treatment delivery system, radiation safety checks (HDR – GYN, prostate, LDR – Therasphere, eyeplaques).
- External Therapy -- Performs and supervises periodic quality assurance of the treatment delivery system (Varian 21EX), quality assurance of the treatment planning system, and patient plans. (3D CRT, IMRT, SBRT, and LINAC-based SRS).
- In-vivo dosimetry: nanoDot OSLD system (for various surface dose measurement).
- Member of Quality Focus Group
Teaching
- Associate director of the Medical Physics Residency Program.
- Co-supervisor for the treatment planning rotation and brachytherapy rotation.
- Instructor for Allied Health Radiation Physics course (RTT 432) – Imaging and Image data in RT.
- Instructor for Radiotherapy Physics courses for Radiation Oncology Residents – 3D dose calculation and motion management.
- Moderator of the monthly Physics Journal Club.
Research Interests
- Designing custom brachytherapy delivery device for conjunctival melanoma.
- Calculation of accumulated dose over the fractionated radiation therapy using daily images.
- Monte Carlo modeling / simulation of the LINAC beams for challenging dosimetry.
- Secondary cancer risk estimation of the dose from the out of the field.
- Plan comparison of IMRT vs. IMPT for base of skull tumors.
Current Clinical Projects
- Designing fetal shields for the pregnant patients.
- Commissioning of MU second check solution.
- Commissioning of custom plaques for choroidal melanoma.
- Designing E-ink based SRS patient setup system.
Key Publications
Lee C, Kupelian P, Langen K et al. Evaluation of image-guidance strategies in the treatment of localized prostate. cancers. Med Phys 2007; 34: 2380-.
Kupelian PA, Lee C, Langen KM et al. Evaluation of image-guidance strategies in the treatment of localized prostate cancer. Int J Radiat Oncol 2008; 70: 1151-7.
Lee C, Langen KM, Lu W et al. Evaluation of geometric changes of parotid glands during head and neck cancer radiotherapy using daily MVCT and automatic deformable registration. Radiotherapy and Oncology 2008; 89: 81-8.
Lee C, Langen KM, Lu WG et al. Assessment of parotid gland dose changes during head and neck cancer radiotherapy using daily megavoltage computed tomography and deformable image registration. Int J Radiat Oncol 2008; 71: 1563-71.
Zacharatou Jarlskog C, Lee C, Bolch WE et al. Assessment of organ-specific neutron equivalent doses in proton therapy using computational whole-body age-dependent voxel phantoms. Phys Med Biol 2008; 53: 693-717.
Zeidan OA, Huddleston AJ, Lee C et al. A Comparison of Soft-Tissue Implanted Markers and Bony Anatomy Alignments for Image-Guided Treatments of Head-and-Neck Cancers. Int J Radiat Oncol 2010; 76: 767-74.
Choonik Lee, PhD, Clinical Instructor and Associate Director of Medical Physics Residency Program
| Phone | (734) 936-4309 |
| Fax | (734) 936-7859 |
| choonik@med.umich.edu | |
| University of Michigan Hospital and Health Systems Department of Radiation Oncology 1500 East Medical Center Dr. UH B2 C438, SPC 5010 Ann Arbor, MI 48109 |
