Course Directors:

Anuj Goenka, MD *

View Bio

Dr. Goenka is board-certified in radiation oncology and physics and has extensive experience with proton radiotherapy, intensity modulated radiation therapy, stereotactic body radiation therapy and brachytherapy applications.

He received his medical degree at Johns Hopkins University and completed his post graduate training at Memorial Sloan-Kettering Cancer Center. He specializes in the treatment of cancers of all subsites, including brain, head and neck, lung, breast, esophageal, colorectal/anal, prostate, and gynecological malignancies.

Dr. Goenka is the recipient of several leadership awards, has published numerous articles and abstracts in national and international journals and has participated as a guest speaker internationally. He holds memberships at the American Medical Association, American Society for Therapeutic Radiology and Oncology, and American Association of Physicians of Indian Origin among others and is actively involved in Community Outreach programs.

Louis Potters, MD, FACR, FASTRO, FABS *

View Bio

Louis Potters, MD, FACR, FASTRO FABS is chairperson of the Department of Radiation Medicine at Northwell Health and professor at the Zucker School of Medicine at Hofstra/Northwell. He is Deputy Physician in Chief and the Marilyn and Barry Rubenstein Chair in Cancer Research for the Northwell Health Cancer Institute. He holds an Affiliate Membership at the Cold Spring Harbor Laboratory Cancer Institute.

Dr. Potters is a practicing radiation oncologist and an internationally recognized expert in the management and treatment of prostate cancer. He has authored more than 180 publications, book chapters and editorials. Board-certified in internal medicine and radiation oncology, Dr. Potters previously served as Medical Director of the New York Prostate Institute and as associate member in radiation oncology at Memorial Sloan Kettering Cancer Center. He received his medical degree from the Rutgers Medical School, and his undergraduate degree from Emory University.

Dr. Potters is past President for the Society of Chairs in Academic Radiation Oncology Programs (SCAROP) and has served as a board member and other leadership roles for the American Society of Radiation Oncology and other medical societies. He has authored several key national cancer treatment guidelines for radiation oncology. Dr. Potters has been a consultant for the US Nuclear Regulatory Commission, the National Quality Forum and the Agency for Healthcare Research and Quality. He has served as an executive committee member for the American College of Surgeons Commission on Cancer and has participated on several US Department of Health and Human Services committees and panels. He is currently on the Board for the Long Island Chapter of the American Cancer Society and is the founding Chair of the Northwell Health Physician Partners Board of Governors, the eighth largest medical group in the US.

Dr. Potters oversees one of the largest radiation oncology departments with a faculty and staff devoted to excellent patient care, research, and the education of tomorrow’s oncologists. The department is recognized as a pioneer for high quality and safe cancer care through its Smarter Radiation Oncology initiative.


15-1-Portrait_Tchelebi Leila fs

Leila Tchelebi, MD*

View Bio

Leila Tchelebi, MD, is an Assistant Professor of Radiation Medicine at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. After graduating from NYU School of Medicine, Dr. Tchelebi did her residency at New York Presbyterian Brooklyn Methodist Hospital. Dr. Tchelebi’s research focuses on quality assurance in radiation medicine, standardization of care, and gastrointestinal (GI) oncology. She’s contributed her insights to guidelines on the treatment of several GI cancers, including pancreas, stomach, and hepatobiliary, and she wrote international guidelines on managing GI patients during Covid.  She’s involved with several national committees geared toward GI oncology, innovation, and quality, and she looks forward to advancing the field through science — all with the aim of continuing to follow her passion for ensuring the best in patient outcomes.


Michael Folkert, MD

View Bio

Michael Folkert, MD, PhD, is Vice Chair and Chief of Brachytherapy at Northwell Health Cancer Institute Radiation Medicine at the Center for Advanced Medicine, and an Associate Professor of Radiation Medicine at the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. He specializes in brachytherapy, radiopharmaceutical therapy and intraoperative radiation therapy. As a clinician, he focuses on genitourinary, gynecological and musculoskeletal cancers.
Before becoming a physician, Dr. Folkert earned his PhD in Nuclear Engineering and Radiological Sciences through the Harvard/MIT Radiological Sciences Joint Program with a focus on charged particle radiation biology research. Dr. Folkert then earned his medical degree from Harvard Medical School and completed his residency at Memorial Sloan Kettering Cancer Center. He went on to direct the brachytherapy and intraoperative radiation therapy programs at UT Southwestern before joining Northwell.
Dr. Folkert has designed and run and clinical trials in prostate, spine, liver and esophageal cancers, and is a pioneer and world expert in intraoperative radiation therapy for spinal tumors. He is currently working to develop and expand brachytherapy and radiophamaceutical options at Northwell Health, and his research includes novel tissue sparing techniques in prostate cancer. Dr. Folkert serves on the U.S. Nuclear Regulatory Commission Advisory Committee on the Medical Uses of Isotopes (ACMUI), and is working on brachytherapy educational initiatives with the American Brachytherapy Society.

Scott Glaser, MD

Scott Glaser, MD

View Bio

Scott Glaser, M.D., is an associate professor of radiation oncology at City of Hope with particular areas of interest of gynecological, breast and prostate cancers. Dr. Glaser received an undergraduate degree from Hope College in Holland, Michigan, and a medical degree from the Loyola University Stritch School of Medicine in Chicago. He completed a medical internship at University of Nevada Reno, followed by a residency in radiation oncology at the University of Pittsburgh.

Dr. Glaser is a member of numerous professional organizations, including American Society for Radiation Oncology, American College of Radiation Oncology, American Society of Clinical Oncology and the American Brachytherapy Society. He has published over 80 manuscripts in peer-reviewed medical journals and is the recipient of numerous national and international awards related to this work. He is an NCCN panel member for Cervix, Endometrial, Vaginal and Vulvar Cancers and co-chairs the gynecological Clinical Pathways for Elsevier. He serves on the NRG Oncology Core Committee for Cervical Cancer, working to develop multimodality clinical trials for gynecological cancers. At City of Hope, Dr. Glaser is the principal investigator on studies looking to optimize the treatment for breast, prostate, and gynecological cancers. He is on the editorial board of the journal Brachytherapy.

William Hall, MD

William Hall, MD

View Bio

I am a radiation oncologist and a physician scientist with an academic appointment at the Medical College of Wisconsin (MCW). I devote considerable research effort towards developing novel applications of radiation treatment for gastrointestinal along with genitourinary malignancies, with a focus on determining predictors of outcomes. I currently serve as principal investigator on several prospective investigator-initiated trials related to multiple different malignancies with a particular focus on imaging and quality of life (eg. NCT03500081, NCT04134260, and NCT05053152). Additionally, I have successfully led and completed multiple prospective trials. My future research goals are focused on improving radiation therapy delivery with translational research to understand precise genomic mechanisms of radiation therapy cellular toxicity. Finally, I am an inventor of a patented technology focused on an entirely novel method of image guidance currently in prototype development.

Lauren Henke, MD

Lauren E. Henke, MD, MS

View Bio

Lauren Henke, MD, MSCI is an Associate Professor of Radiation Oncology and Director of the GI Radiation Oncology service at University Hospitals/Case Western Reserve University in Cleveland, Ohio, where she also co-leads the GI Oncology Disease Team for Seidman Cancer Center. Her clinical specialty is the treatment of gastrointestinal cancers. She has specialized in the development and clinical implementation of advanced technologies, like advanced CT- and MRI-guided radiotherapy, since 2014. She has formal training in clinical trial design and has been a principal investigator on multiple prospective clinical trials of online adaptive radiotherapy using both CT and MRI guidance. These include the first-ever clinical trial of stereotactic MR-guided online-adaptive RT (SMART) and an ongoing Phase II prospective clinical trial of CT-guided stereotactic adaptive radiotherapy for borderline resectable and locally advanced pancreatic cancer. Dr. Henke also serves on the National Cancer Institute (NCI) Task Force on pancreatic cancer and the NRG Oncology working groups for pancreas and hepatobiliary cancers. She is the recipient of multiple institutional and industry research grants, focusing on the clinical development and early implementation of emerging radiotherapy technologies with particular focus on GI applications.

Hodgson 2023 headshot small

David Hodgson, MD, MPH, FRCPC

View Bio

David Hodgson is a Professor in the Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto. He is the Medical Director of the Pediatric Oncology Group of Ontario (POGO), holds the POGO Chair in Childhood Cancer Control at the University of Toronto, and serves on the Hodgkin Lymphoma Steering Committee of Children’s Oncology Group. He is the author of over 100 manuscripts in the field of lymphoma and long-term survivorship, and his work has been cited in publications in five languages, the NIH President’s Cancer Panel Report, and the Strategic Plans of the Department of Veterans Affairs and the UK National Health Service.

Puneeth Iyengar, MD, PhD

View Bio

Puneeth Iyengar is an Attending, Director of the Metastatic Service, Member of the Thoracic Service, all in the Department of Radiation Oncology at Memorial Sloan Kettering Cancer Center. He has led programs investigating the use of local therapy (SBRT) in the setting of oligometastatic NSCLC (Iyengar et al, JCO 2014, Iyengar et al, JAMA Oncology 2017), hypofractionated therapies for stage III NSCLC (Iyengar et al, JAMA Oncology 2021) and is principal investigator of NRG LU 002, a phase II/III randomized trial assessing the benefits of immunotherapy -/+ local therapy on overall survival for stage IV NSCLC. Dr. Iyengar also runs an independent NIH-funded research laboratory studying cancer cachexia from a basic science and translational perspective. Dr. Iyengar trained at MD Anderson Cancer Center and received his MD, PhD degrees at Albert Einstein College of Medicine (NYC) and Bachelor of Science at MIT.


Ana Kiess, MD, PhD

View Bio

Dr. Ana Kiess is Associate Professor of Radiation Oncology and Molecular Radiation Sciences at Johns Hopkins University. She completed her MD and PhD in biomedical engineering at Duke University followed by residency in radiation oncology at Memorial Sloan-Kettering. She then conducted postdoctoral research in PSMA-targeted radiopharmaceuticals with Dr. Martin Pomper and joined the faculty of Johns Hopkins. Her clinical focus is on radiopharmaceutical therapies and external beam radiotherapy for prostate cancer and other cancers. Her research concentrates on combination therapies and new radiopharmaceutical therapies, as well as the integration of dosimetry and dose-response analyses into the clinic for both alpha and beta emitters.

Headshot Moghanaki 1

Drew Moghanaki MD, MPH

View Bio

Dr. Drew Moghanaki is Professor and Chief of Thoracic Oncology in the UCLA Department of Radiation Oncology, and co-director of the VA Greater Los Angeles Lung Precision Oncology Program. He is co-chair of the VALOR phase III randomized trial for operable stage I non-small cell lung cancer.

Chirag Shah, MD

Chirag Shah, MD

View Bio

Chirag Shah, MD is the Co-Director of the Comprehensive Breast Program and serves as Director of Breast Radiation Oncology and Director of Strategic Growth in Department of Radiation Oncology at the Taussig Cancer Center, Cleveland Clinic. He completed his undergraduate degree at Youngstown State University and his medical training at Northeast Ohio Medical University. He completed his internship and residency in radiation oncology at William Beaumont Hospital.

Neil Taunk, MD

Neil K. Taunk, MD, MSTCS

View Bio

I am an Assistant Professor of Radiation Oncology and Radiology at Perelman School of Medicine, University of Pennsylvania. I completed medical school at Rutgers University – Robert Wood Johnson Medical School with a Masters focused in novel molecular prognostic markers and commercializing innovation, and residency training at Memorial Sloan Kettering Cancer Center. I attend on the Penn Medicine Nuclear Medicine Imaging and Therapy Service seeing patients with all types of cancer who may benefit from radionuclide therapy. I have expertise in preclinical and early-phase clinical novel molecular imaging and therapy. I particularly have interest and expertise in Phase I and II theranostic protocols, understanding how to accelerate research and acceptance of novel theranostics. My research is funded by the NIH, RSNA, Basser Center for BRCA, Varian Medical Systems, and Therapanacea AI. I am dedicated to expanding training, clinical care, and innovation in radiopharmaceutical therapies.

Yang 3 2

Jonathan Yang, MD, PhD

View Bio

Dr. Jonathan Yang is an Associate Professor in the University of Washington’s School of Medicine Department of Radiation Oncology. He serves as the Director of Metastatic Disease and Developmental Therapeutics in the Department. His clinical and academic expertise is in metastatic disease, central nervous system malignancies, and precision radiation oncology through rational combination of novel therapeutics with radiotherapy for which he serves as the principal investigator of several ongoing first-in-human trials investigating DNA damage response inhibitors with radiation. He is also focused on translational biomarker development to guide appropriate treatment selection in patients with metastatic cancers. In addition, combing his passions in central nervous system malignancies and metastatic disease, Dr. Yang has a special interest in the management of solid tumor leptomeningeal metastasis where he is focused on developing effective radiation approaches and elucidating the unique biological process in the central nervous system after radiation therapy.

Yom headshot


View Bio

Dr. Sue S. Yom, MD, PhD, MAS, FASTRO, FAAWR, FACR is the Vice Chair of Strategic Advisory and the Irwin Mark Jacobs and Joan Klein Jacobs Distinguished Professor in the Departments of Radiation Oncology and Otolaryngology Head and Neck Surgery at the University of California San Francisco. She is the Editor-in-Chief of the International Journal of Radiation Oncology Biology Physics, Chair of the NRG Oncology Head and Neck Cancer Committee, and the Guidelines and Protocols Committee Co-Chair and Board Member for the Head and Neck Cancer International Group. She is also a Board Member of the RTOG Foundation and the patient advocacy organization Head and Neck Cancer Alliance. She is a Past President of the American Radium Society and was the founding Chair of the ARS Appropriate Use Criteria Committees. She is a member of the NCCN Head and Neck Cancers guidelines committee and is a member of the Head and Neck Cancer Resource Panel, Science Education Program Development, and Health Equity Diversity Inclusion Education Committees of the American Society of Radiation Oncology. At UCSF, she serves as Co-Chair of the Oral Head and Neck Site Committee, Contact PI for NRG Oncology, and Full Member in Molecular Oncology for the Helen Diller Family Comprehensive Cancer Center. She has been author or co-author on over 250 publications in the medical literature. She has served on expert panels and scientific organizing committees for numerous professional societi

photo northwell studio zinkin 2021

Heather Zinkin, MD

View Bio

Heather Zinkin, MD is a radiation oncologist at Northwell health in Huntington with a special interest in breast cancer, integrative medicine, patient wellness and nutrition. She attended the University of Pennsylvania and graduated Summa Cum Laude.  She graduated from NYU School of Medicine and performed her medical internship at Brigham and Women’s Hospital in Boston. She completed a residency in radiation oncology at a combined program at Tufts and Brown University and served as chief resident. She then returned to her hometown where she has been practicing for the past 15 years and was appointed Chief of Radiation Medicine at Huntington Hospital. She has given many breast cancer and survivorship lectures both in hospital and community settings including active participation in the Northwell Wellness Center. She has also served on various physician panels for community education and holds certificates in Nutrition from Cornell University.

* Planner

Physics Track:

Yijian Cao 2023

Yijian Cao, PhD

View Bio

Serving as chief physicist of Department of Radiation Medicine at Northwell, Yijian Cao, Ph.D, oversees and coordinates clinical medical physics operations at all 8 department sites. He is also to develop and grow research and education programs in radiation oncology physics and clinical dosimetry. His research focuses are the optimizations and automations of treatment planning, AI/ML for clinical QA procedures, and workflow management and integration for safety and efficiency. He teaches in Hofstra medical physics graduate program.

Board Certifications
Therapeutic Medical Physics – American Board of Medical Physics

Administrative Titles
Director of Medical Physics – Department of Radiation Medicine, Northwell

Academic Titles
Assistant professor, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell
Adjunct associate professor, Department of Physics, Hofstra University

B.S. – Physics, Nanking University
Ph.D – Condensed Matter Physics, University of Missouri-Columbia

Chang - Jenghwa Chang

Jenghwa Chang, PhD, FAAPM *

View Bio

Dr. Jenghwa Chang is a medical physicist certified by ABR and ABMP. His major clinical responsibility is Gamma Knife stererotactic radiosurgery/radiogherapy and he is currently the lead physicist for the Gamma Knife SRS/SBRT program at Northwell Health. Dr. Chang is the Director of the Medical Physics Residency Program at Northwell Health as well as the Director of Medical Physics Graduate Program at Hofstra University.

Dr. Chang received the B.S. degree in control engineering and the M.S. degree in communication engineering, both from the National Chiao-Tung University, Hsinchu, Taiwan, and earned his Ph.D. degree in electrical engineering from the Polytechnic Institute of New York University, Brooklyn. Prior to his current position, Dr. Chang held faculty appointments at NewYork Presbyterian Hospital-Weill Cornell Medical College (2010-2016), NYU Langone Medical Center (2008-2009), and Memorial Sloan-Kettering Cancer Center (1997-2008). Dr. Chang is a member of IEEE, AAPM and ASTRO. He is actively involved in professional activities and has served multiple committees and officers for AAPM and RAMPS. He has also offered several SAM educational/professional lectures to colleagues at various national/international meetings, and is a site surveyor for the ACR ROPA program.

Dr. Chang’s research interest involves applying engineering and physics principles to medicine, particularly, in the fields of radiology and radiation oncology. He has published over 60 peer-reviewed journal articles in the fields of electrical engineering, medical physics, radiation oncology and biomedical engineering. Dr. Chang was a pioneer in optical diffusion tomography for early detection of breast cancers. He has also implemented the cone-beam computed tomography on a medical linear accelerator to improve the treatment setup accuracy and critical organ avoidance for radiation oncology patients.  Currently, he is focusing on the research of quality improvement, automation, deep-learning network and small field dosimetry. Dr. Chang is a reviewer for multiple international peer-reviewed journals, including Medical Physics, International Journal of Radiation Oncology Biology Physic, Journal of Applied Clinical Medical Physics…


Lindsey A. Claps, MS

View Bio

Lindsey Claps, based in New York, NY, US, is currently a Radiotherapy Physicist at Memorial Sloan Kettering Cancer Center, bringing experience from previous roles at University of Minnesota. Lindsey Claps holds a 2015 – 2017 Master’s Degree in Medical Physics @ Hofstra University. With a robust skill set that includes Physics, Data Analysis, Research, Science, Materials Science and more, Lindsey Claps contributes valuable insights to the industry. Lindsey Claps has 1 email on RocketReach.

Dong Han

Dong Han, PhD

View Bio

Lyu Huang, MS

Lyu Huang, MD

View Bio

Mr. Lyu Huang, who holds a Bachelor of Science in Nuclear Technology and a Master of Engineering in Biomedical Engineering from Fudan University, pursued his Master of Science in Medical Physics at Columbia University. He then undertook the Radiation Oncology Physics Residency at Northwell Health, where he has since been diligently serving as a therapeutic medical physicist in the clinical service line.
Mr. Huang is an integral member of key professional societies, including the Radiological and Medical Physics Society of New York (RAMPS) and the American Association of Physicists in Medicine (AAPM). From 2020 to 2022, he volunteered on the Smart Tool Subcommittee (Medical Physics 3.0), aiding in the development of technological resources to standardize and streamline MP3.0 practice. Reflecting his commitment to the profession, he actively mentors through the AAPM Mentorship Program, guiding the next wave of medical physicists. Additionally, he has played vital roles as the primary mentor and lecturer for medical and physics residency training at Northwell Health.
As an active contributor to academic medical physics, Mr. Huang has authored eight peer-reviewed publications featured in esteemed journals such as European Radiology. He has presented his research at various national and international medical physics conferences, including the best poster competition and the early-career investigator symposium at the AAPM meetings. His research primarily focuses on quality and safety, radiation dosimetry, advances in brachytherapy, Monte Carlo techniques, and the utilization of radiomics in forecasting cancer prognosis.

Xiang Li

Xiang Li, PhD

View Bio

I am a chief attending physicist in the Medical Physics Department at Memorial Sloan Kettering Cancer Center (MSKCC). My job responsibilities fall into three categories: (1) As the regional service chief, I manage physics operations at 6 MSK outpatient facilities with 19 LINACs and 3 HDR afterload units and supervise 23 faculty physicists, 13 staff physicists, and 34 dosimetrists; (2) As a member of the MSK radiation oncology QA committee, dosimetry core committee, treatment planning core committee, and Radiotherapy Physics Service Leadership Core committee, I am heavily involved in the development, discussion, review, and approval of enterprise-wide programs for major radiation oncology equipment quality assurance, external beam and brachytherapy treatment planning and clinical operations, and administrative policy and procedures. (3) I lead a search group on implementing deep-learning-based quantitative marker-less intrafraction motion monitoring techniques for various disease sites, mentor junior faculties, promote academic activities, and facilitate research collaborations among the team members.

My research interests have heavily focused on CBCT image reconstruction, medical image segmentation, deformable image registration, IMRT treatment planning optimization algorithms, image-guided radiation therapy, and respiratory motion effects and management in LINAC-based stereotactic body radiation therapy (SBRT) treatment. I have published over 50 peer-reviewed articles and numerous abstracts and have frequently served as guest associate editor and reviewer for many prestigious journals. In recent years, my research focused on developing deep learning techniques for improved quantitative intrafraction motion monitoring in conventional Linear Accelerator platforms.

Ongoing research funding:

  1. NIH R01 CA258821-01A

(PIs: Andreas Rimner and Harini Veeraraghavan)

Safer Lung Cancer Radiotherapy delivery using novel artificial intelligence methods


Role: Co-investigator (5% effort)

       2. Varian Medical Systems

(PIs: Tianfang Li/Pengpeng Zhang/Xiang Li) 

07/01/22 – 06/30/24

A Deep Learning-Based Intrafraction Motion Monitoring Platform with Simultaneous MV/KV Imaging for Paraspinal SBRT Treatments

Role: Contact-PI

15-1-ma 600-rev-2005-fccc

Chang-Ming Charlie Ma, PhD, FAAPM, FASTRO, FACMP

View Bio

Dr. CM Charlie Ma received his Ph.D. in medical physics from the University of London, London, UK in 1992. He continued his radiation therapy research and clinical training at the Royal Marsden Hospital/Institute of Cancer Research, London, UK until 1993. He was an associate research officer at the National Research Council of Canada, Ottawa, Canada from 1993 to 1996, and an associate professor at Stanford University Medical School, Stanford, CA from 1996 to 2001. Since 2001, he has been Professor, Director of Radiation Physics and Vice Chairman of the Department of Radiation Oncology at Fox Chase Cancer Center, Philadelphia, PA. Dr. Ma is recognized internationally as an expert in radiation dosimetry, image guidance, plan optimization and treatment delivery for advanced radiation therapy. He has edited 4 books and published more than 20 book chapters and 230 peer-reviewed journal articles in these areas. He was elected Fellow of American College of Medical Physics (ACMP), American Association of Physicists in Medicine (AAPM), American Society for Radiation Oncology (ASTRO), and Institute of Physics (IOP), and served as a member on numerous professional committees, journal editorial boards and scientific review panels.


Mahin Tariq, MS, DABR

View Bio

My name is Mahin Tariq and I am working as a Medical Physicist for New York-Presbyterian, Radiation Oncology. I received my ABR certification in Therapeutic Medical Physics in 2021. After my M.S studies in Medical Physics at Hofstra University, I received my residency training in Radiation Therapy Physics with McGill University. My interest in this field is assessing and improving clinical workflows and procedures in Radiation Therapy, while also leading and supporting clinical research projects for publication. I am also enthusiastic in sharing my knowledge as a young physicist to new physicists entering this field and remaining involved in mentoring young physicists. I have been a member of the New Professional Subcommittee since 2022 and actively help in organizing sessions for the annual AAPM meetings.


Marissa J. Vaccarelli, MS, DABR

View Bio

I am a board-certified radiation physicist specialized in therapeutic medical physicist at the Department of Radiation Medicine, Northwell Health. In my current appointment, I am also the Medical Physics Assistant Program Director and Adjunct Instructor at Hofstra University. My clinical practice includes the review and support of external beam radiation therapy treatments for all disease sites. I am a member of our brachytherapy team in our institution’s prostate seed low dose rate as well as our gynecological high dose rate programs, respectively. In my role as a physicist, I am responsible for the quality assurance and calibration of our medical linear accelerators. In addition to my clinical duties, I am a member of our clinical protocols group and also serve on our quality and safety committee as well as our ROILS committee. I am a topical instructor for radiation oncology and medical physics residents. Additionally, I am the supervisor of our graduate students medical physics assistants. At Hofstra University, I mentor our graduate students and serve as the instructor for the “Radiation Therapy Practicum.” I also designed and implemented our new “Ethics and Professionalism” course. My research interests include failure modes and effects analysis, new process implementation, clinical workflow optimization as well as adaptive radiation therapy techniques.

Yi Fang Wang, PhD, DABR

Yi-Fang Wang, PhD, DABR

View Bio

Yi-Fang Wang, MS, PhD, DABR, is a Medical Physics Faculty at Columbia University Irving Medical Center (CUIMC). She holds a Master of Science in Medical Physics and recently completed her PhD in Applied Physics at Columbia University. Dr. Wang
finished her clinical residency training at CUIMC in 2021 and has since been actively involved in research, presenting at national and international conferences. Her research focuses on 3D radiation dosimetry measurements, AI-driven online adaptive radiotherapy, and the application of dual-energy CT in Radiation Oncology. Dr. Wang is also integral to the automated planning, strategy design, and workflow optimization in OART at CUIMC, demonstrating her dedication to advancing the field.

Nursing Track:


Jonathan Cohen, PA, RPA-C

View Bio

Jonathan Cohen is a highly experienced physician assistant with a diverse background spanning over two decades.  My journey began as an EKG technician in the mid 1990’s, and I then became a board-certified Respiratory Therapist in 1997.  I became sick with a personal illness and chose to write a book about my experiences called “This Too Shall Pass.”  This set the foundation for a commitment to patient care.

In 2001, I became a board-certified Physician Assistant.  I have gained experience in numerous specialties, and for the past 12 years I have specialized in Radiation Oncology.  I spent 5 years specializing in outpatient head/neck cancers and have spent the remainder on the inpatient Radiation Medicine service line.  I work closely with a multi-disciplinary team to help make the best decisions on an individual basis for those whose lives have been greatly challenged by having cancer.   

Sotiria Hountas, RN

Sotiria Hountas, RN

View Bio

Sotiria Hountas is a registered nurse working in the radiation medicine department at Northwell Health Zuckerberg Cancer Institute.  Ria has extensive knowledge in oncology, specifically working with pediatric patients receiving radiation therapy. 

Kelsey head shot

Kelsey Keenan, RN, BSN, OCN*

View Bio

Kelsey Keenan has been an Oncology RN for 12 years, the last 8 years, in Radiation Oncology. She graduated dean’s list from New York University with a BSN degree. She is an active member of ONS and gained her OCN certification in 2017. She worked inpatient oncology from 2010-2014 at Maimonides Medical Center and NYU Langone Medical Center. In 2014, she became a nurse at NYU Winthrop Hospital and worked in their Cyberknife Radiation Center in Manhattan until 2021. Currently, she is working as a nurse manager at Northwell Health in the Radiation Medicine department. She actively participates in Nursing and Medical research. She has been interviewed by Ecancer Organization and has authored nine poster presentations since 2018 that she presented at conferences nationwide.

Gayle Somerstein

Gayle Somerstein, RN, BSN, OCN, MPH, MBA*

View Bio

Gayle Somerstein currently works as the Senior Director of Patient Care Services for the Radiation Medicine Service Line in the Northwell Health Cancer Institute. Ms. Somerstein’ s responsibilities include clinical leadership and oversight of multiple radiation oncology sites. Gayle supervises clinical staff at all radiation oncology department locations within the Northwell Cancer Institute and ensures that there is standardization of clinical practices throughout the service line.

Gayle leads many of the quality improvement and patient satisfaction initiatives for the radiation service line, employing initiatives to improve patient experience in the department through the initiation of an integrative and complementary medicine program for radiation patients. Ms. Somerstein is an active member of the Radiation Medicine Quality Committee.

Gayle is an NYU graduate, earning her Master of Public Heath (MPH). She also holds a BSN and an MBA from Adelphi University and is currently working towards her Doctor of Nursing Practice (DNP) at Aspen University.

Rebecca Spirn picture

Rebecca Spirn, RD, COS, CDN

View Bio

After devoting several years to her family, Rebecca decided to return to school to pursue her long-standing dream of becoming a registered dietitian. Rebecca completed the Didactic Program in Dietetics at Queens College and the Northwell Health Dietetic Internship. She currently works in both inpatient and outpatient settings; in the inpatient environment, she practices medical nutrition therapy for both pediatric and adult patients with a wide range of medical conditions. As an outpatient registered dietitian for the Department of Radiation Medicine, Rebecca assists oncology patients and their caregivers in maximizing their nutritional status and quality of life throughout treatment and beyond. She also provides educational materials and workshops for both patients and staff, which she especially enjoys. Rebecca has given presentations on topics such as oncology nutrition and management of dysphagia to other healthcare providers, students, and patients. Rebecca is board certified as a specialist in oncology nutrition (CSO).

Rebecca is married and the mother of five wonderful boys and one fantastic daughter-in-law


Bin Gu

Bin Gu, PA*

View Bio

Bin Gu is a Senior Physician Assistant at Queens Radiation Center of Northwell Health System, NY.  He graduated from York College PA program in 2011. He worked at Memorial Sloan -Kettering Cancer Center for seven years before joining Department of Radiation Medicine, Northwell Health in 2012.