At Stony Brook Medicine, experienced radiation oncologists work with other members of the Radiation Oncology team to treat patients with cancer. The team uses a wide range of radiation therapies and advanced techniques-all with the goal of killing cancer cells and sparing healthy tissue from damage.
Samuel Ryu, MD
Professor and Chair, Radiation Oncology, and Deputy Director, Clinical Affairs, Stony Brook Cancer Center
Board Certification: Radiation Oncology
Language (other than English): Korean
Recognition: America’s Top Doctors, 2005 to present (Castle Connolly) and Top Doctors List from Hour Detroitmagazine, 2005 to 2013; America’s Top Oncologists of Consumers’ Research Council of America,
2006 to present
Specialty: Brain and Spine cases, Benign tumors, Head and Neck cancers
Personal Statement: I am at the forefront of high technology radiosurgery of brain and spine tumors. I give my constant effort to compassionate use of these treatments for my patients. I try to be on the patient's perspective and care about the patient's well-being.
For more information about Dr. Ryu, click here
View Video: Pushing Radiosurgery to the Edge
Kartik Mani, MD, PhD
Clinical Assistant Professor, Radiation Oncology
Board Certification: Radiation Oncology
Medical School: Albert Einstein College of Medicine, Bronx, NY
Residency: St. Luke's-Roosevelt Hospital Center, New York, NY
Residency: Montefiore Medical Center, Bronx, NY
Specialty: Lung Cancer, Head and Neck Cancer, Gastrointestinal Cancer, Prostate Cancer, Brain Tumor, Stereotactic Body Radiotherapy (SBRT), Biomedical Information
Meet Our Doctor Video: Dr. Kartik Mani
CancerWise Smart Talk Video on Lung Cancer: Presented by Dr. Kartik Mani
Alexander M. Stessin, MD, PhD
Associate Professor, Radiation Oncology
Board Certification: Radiation Oncology
Medical School: Rockefeller University, Sloan-Kettering Institute, and Weill Cornell Medical College; MD and Ph.D. in medicine/pharmacology from tri-institutional MD/Ph.D. program
Residency: New York-Presbyterian
Hospital/Weill Cornell Medical College; transitional year residency at St. Vincent's Medical Center, Bridgeport, CT; Radiation Oncology
Specialty: Gastrointestinal Cancers, Breast Cancers, Brain and Child Tumors
For more information about Dr. Stessin, click here
View Video: Pushing Radiosurgery to the Edge
Alexander Slade, MD. PhD
Clinical Assistant Professor, Radiation Oncology
Board Certification: Radiation Oncology
Medical School: the University of Illinois with an MD and PhD (focused on health economics)
Residency: Virginia Commonwealth University in Richmond, VA
Specialty: I primarily see patients with genitourinary cancers, especially prostate cancer. My practice involves both external beam radiation therapy (including Stereotactic Body Radiation Therapy) as well as high dose rate (HDR) brachytherapy. I feel privileged to be able to work with other members of the Stony Brook Cancer Center team to be able to offer a full range of treatments for patients facing prostate cancer. My research interests include clinical topics related to prostate cancer radiotherapy, the role of radiation therapy on normal tissue injury, as well as health services research related to long-term radiation toxicities among cancer survivors.
CancerWise Smart Talk Video on genitourinary cancer, including prostate cancer: Presented by Dr. Alexander Slade
Edward Valentine, MD
Clinical Assistant Professor, Radiation Oncology
Board Certification: Radiation Oncology
Language (other than English): French
Medical School: New York Medical College
Residency: Memorial Sloan-Kettering Cancer Center, Radiation Oncology
Fellowship: Memorial Sloan-Kettering Cancer Center, Radiation Oncology
Specialty: Women's Cancers, Leukemia and Lymphomas, Head and Neck Cancers
For more information about Dr. Valentine, click here
View Video: External Beam Radiation Therapy, Presented by Edward Valentine, MD
Clare M. Moran, DNP, FNP, RN
Family Nurse Practitioner, Radiation Oncology
Board Certification: Family Nurse Practitioner
Doctor of Nursing Practice: Stony Brook University Master of Science in Nursing
Family Nurse Practitioner: Columbia University Bachelor of Science in Nursing: Binghamton University
Bruce Demple, PhD
Ph.D., Biochemistry, University of California, Berkeley
B.A. Biology, Wesleyan University
For most of my career, I have been investigating cellular pathways that cope with free radical stress and oxidative DNA damage. Many of the same pathways act in response to ionizing radiation, and our work helps reveal how these mechanisms influence the cellular effects of radiation, with potential application to radiotherapy.
Tiezhi Zhang, Ph.D, DABR
Medical Physicist
Professor and Director of Medical Physics
Radiation Oncology, School of Medicine
Research Interest: Novel x-ray source development, distributed x-ray system for imaging and radiation treatment, FLASH-RT, proton imaging and quality assurance. My current research focused on the development of novel x-ray imaging systems based on distributed x-ray sources and proton FLASH-RT QA.
Education: PhD, Medical Physics, University of Wisconsin, Madison, WI 2004
MS, Physics, Drexel University, Philadelphia, PA, 1999
BS, Physics, Jilin University, Chuangchun, China, 1994
Publications: A list of publications can be found HERE.
Contact Information
Office Tel: (631) 444-3617
Email: tiezhi.zhang@stonybrookmedicine.edu
Stony Brook University Hospital
Department of Radiation Oncology
Hospital Level 2, Room 660
Stony Brook, NY 11794-8460
Jinkoo Kim, Ph.D, DABR
Medical Physicist, Radiation Oncology & Clinical Associate Professor, School of Medicine
Research Interest: Biomedical image registration and segmentation for advanced radiotherapy modalities – My expertise lies in oncologic image analysis, focusing on applications for radiation therapy (such as SRS, SBRT, and adaptive RT). My current research centers on developing AI-based algorithms for medical image registration and segmentation to address ongoing challenges in radiation therapy
Education: PhD, Electrical and Computer Engineering, Wayne State University, MI, 2007
MS, Electrical and Computer Engineering, Wayne State University, MI, 2001
MS, Electronic Engineering, Sungkyunkwan University, Seoul, Korea, 1998
BS, Electronic Engineering, Sungkyunkwan University, Seoul, Korea, 1995
Publications: A list of publications can be found HERE.
Contact Information
Office Tel: (631) 444-8298
Email: Jinkoo.kim@stonybrookmedicine.edu
Stony Brook University Hospital
Department of Radiation Oncology
Hospital Level 2, Room 648
Stony Brook, NY 11794-8460
Xin Qian, PhD, MBA, DABR
Medical Physicist & Clinical Assistant Professor
Research Interest: I have spent significant amount of time on translational research:
Radiopharmaceutical dosimetry study
AI based image reconstruction
Medical device design and development
Education: MBA, Stony Brook University, 2023
Residency, Medical physics, Columbia University, 2014
Post Doc, Medical physics, University of North Carolina, Chapel Hill, 2011
PhD, Optical Physics, Bournemouth University, UK, 2008
BSc. Physics, Tianjin University, 2004
Publications: (Selected from 60+ peer reviewed papers and proceedings)
X. Qian, Ziyu Shu, Salar Souri, Yizhou Zhao, Zhaozheng Yin, Renee Farrell, Jinkoo Kim, Jieying Wu, Sam Ryu, Tiezhi Zhang: Dual-Source Cone-Beam CT for HDR Brachytherapy In-Suite Imaging: Simulation Studies of Limited Angle Image Reconstruction based on Deep Image Prior. Brachytherapy, 2025 (in process).
X. Qian, Dejan Trbojevic, Samuel Ryu: Spread Out Bragg-Peak FLASH Proton Beams by Permanent Magnet Synchrotron for SRS and SBRT. JRSBRT, 2025
R. Vasyltsiv, X. Qian (co-first author), S. Ryu, W. Zhao. and A. Howansky, Feasibility of 4D HDR brachytherapy source tracking using x‐ray tomosynthesis: Monte Carlo investigation. Medical Physics, 50(8), pp.4695-4709, 2023
Jason Qin, Lindsay Puckett, X. Qian, Image Based Fractal Analysis for Detection of Cancer Cells, IEEE Bioinformatics and Biomedicine, 49941. 9313176, 2020
X. Qian, and J. Adamovics, Performance of an improved first generation optical CT scanner for 3D dosimetry, Phys. Med. Biol. 58, N321–N331, 2013.
X. Qian, R. Rajaram, X. Calderon-Colon, T. Phan, O. Zhou: Design and Characterization of a Spatially Distributed Multi-Beam Field Emission X-ray Source for Stationary Digital Breast Tomosynthesis, Medical Physics, 36 (10), 4389-4399, 2009. (This article is selected for Virtual Journal of Nanoscale Science & Technology, 20 (12), 2009.The Virtual Journal is an edited compilation of links to articles from participating publishers, covering a focused area of frontier research.)
Contact Information:
Stony Brook University Hospital, Department of Radiation Oncology
Stony Brook, NY 11794
Renee Farrell, Ph.D, DABR
Medical Physicist & Clinical Assistant Professor
Research Interest: My current research interests include artificial intelligence for oncologic applications, including radiomics and deep learning projects. I am also involved in research studies investigating the ability of Raman spectroscopy to be used for tissue classification.
Education: PhD, Biomedical Engineering, Stony Brook University, NY, 2020
BA, Philosophy, Stony Brook University, NY, 2014
Publications:
A list of publications can be found HERE.
Contact Information
Office Tel: (631) 216-9087
Email: Renee.Farrell@stonybrookmedicine.edu
Stony Brook University Hospital
Department of Radiation Oncology
Stony Brook, NY 11794-8460
An Ting Hsia, MS
Radiation Oncology, Medical Physicist
Board Certification: Therapeutic Radiologic Physics
Specialty: Image-Guided Radiation Therapy, SRS/SRT/SBRT Treatment