medical physicist
Resume:
Kang-Hyun Ahn, PhD, DABR
Cell 650-***-****, *******@*****.***
Education and Training
****-******* **** *** ************* in Therapeutic Medical Physics
****-******* ***** ** ******** registration as an approved Therapeutic Radiation Physicist
2007-2010 Postdoctoral Fellowship, Radiation Physics, Stanford University
2006 Ph.D. Medical Physics, University of Chicago
1999 B.S. Physics, Seoul National University
Experience
University of Illinois Hospital and Health Sciences System (Jan/2011 – present)
Medical Physicist, Department of Radiation Oncology (affiliated with the University of Chicago)
General clinical physics support
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- Provide consultation to radiation oncologists in external beam and brachytherapy.
- Perform initial and weekly physics chart review in paper-based/paperless ARIA EMR.
- Perform monthly, quarterly and annual QA of Varian linacs (21EX) using IBA Blue Phantom
water tank, VariSource iX HDR afterloader, and large-bore Philips CT.
- Document clinical policies and procedures compliant with state regulation and AAPM reports.
Linac-based stereotactic procedures using BrainLab iPlan and ExacTrac system
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- Supervise IGRT/SBRT setup with ExacTrac system and CIVCO body Pro-Lok table.
- Plan intracranial SRS treatments using conformal beams and BrainLab cone system.
- Perform Winston-Lutz Test and patient specific QA including measurements of depth helmet and
Target Positioner (TAPO).
- Attended Brainlab Academy: Treatment Planning and Physics, Chicago, May 7-11, 2012.
3D conformal and IMRT treatment planning using Varian Eclipse
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- Plan treatments for head & neck SIB, prostate, pelvis, breast, abdomen.
- Perform patient specific QA using IBA MatriXX 2D array ion chambers and OSLD.
- Perform MU check using hand calculation and LSI RadCalc.
- Supervise and assist in patient setup using alpha-cradle, aquaplast, lightcast, and Calypso system.
HDR/LDR brachytherapy patient procedure and treatment planning in BrachyVision
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- Plan/Oversee gynecologic cases using HDR applicators (cylinder, tandem and ovoids).
- Prepare/Plan eyeplaque, and perform independent source assay (I-125 model 6711).
Acceptance, commissioning, setting up QA program of new equipments
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- Commissioned Philips Brilliance Big Bore 16 Row CT unit per TG-66.
- Commissioned Calypso target localization system per TG-147.
- Commissioned beam data for SRS setup.
- Set up PIPSpro QA program of Radiation-Light, starshot, stereotactic, MLC.
Skills with Computer systems, Software package, and Imaging modalities
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- Implement various machine and patient-specific QA procedures in Excel spreadsheet.
- Perform QA and supervise use of Philips CT, EPID MV imaging, ExacTrac kV imaging.
- 10-year experience of programming, image processing, and data analysis in MATLAB.
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Research on radiation oncology physics
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- Preplanning of SRS using Brainlab iPlan system & anthropomorphic phantom
- Analyze dosimetric effect of Calypso surface beacon.
- Perform and investigate Intensity Modulated Total Marrow Irradiation (phase I clinical trial).
Teaching and educational activities
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- Volunteered to lecture to physician residents on brachytherapy physics.
- Mentor to dosimetry trainees in Masters program of University of Wisconsin La Crosse.
Stanford University (2007 –2010)
Postdoctoral scholar, Division of Radiation Physics, Department of Radiation Oncology
Enrollment in the clinical training program for 38 months
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- Performed patient-specific QA for IMRT and RapidArc using PTW 2D array ion chambers,
EDR2 film, Gafchromic EBT film, RIT software and TLD.
- Performed monthly and annual QA of Varian Clinac 21EX, Trilogy and kV imaging systems.
- Conducted treatment planning analysis in Varian Eclipse and CyberKnife MultiPlan system.
- Performed weekly chart checking and discussed treatment procedures with assigned supervisors.
Development of a preclinical multi-parametric MR system for adaptive radiotherapy based on
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tumor hypoxia and redox status
- Worked out spin-echo & Gradient-echo pulse programming in custom MRI console.
- Prepared small animal protocol for imaging and xenograft.
Design of a protocol of MRI-guided accelerated partial breast irradiation (APBI)
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- Customized MR pulse sequences for lumpectomy cavity identification.
- Analyzed setup reproducibility by incorporating deformable image registration using Statistical
Parametric Mapping package.
University of Chicago (2000 – 2007)
Graduate student & postdoctoral research associate
Development of hypoxia imaging system based on Electron Paramagnetic Resonance (EPR)
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- Improved spectral-spatial EPR imaging data acquisition and tomographic image reconstruction.
- Developed EPRI simulation software package in MATLAB using 4D Radon transform.
- Correlated EPR oxygen imaging with fiber optic device measurements (OxyLiteTM) in murine
tumors.
Dosimetric analysis of bone marrow-sparing IMRT vs conventional techniques
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- Produced and compared treatment plans of IMRT, 4-field box, AP-PA of cervical cancer
patients.
Honors and Professional Memberships
2009, AAPM Research Seed Funding Grant to develop a preclinical imaging system
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2005, Young Investigator Award, International Conference on EPR Spectroscopy and Imaging of
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Biological Systems, Sep 4-8, 2005, Columbus, OH
2003 – present, AAPM member
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Peer-reviewed Publications & Peer review activities
Published 7 first author papers, 5 co-author papers
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5 invited oral presentations, 2 moderated poster presentations
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Completed 13 review assignments for Int J Radiat Oncol Biol Phys since 2010
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