Our Faculty: Physicians and Physicists

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 University 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

Mark Ashamalla, MD 
Clinical Assistant Professor, Radiation Oncology

Board Certification: Radiation Oncology 

Medical School:  Sidney Kimmel Medical College at Thomas Jefferson University in Philadelphia

Internal Medicine Internship: Albany Medical Center jointly with the Albany Stratton Veteran's Hospital

Residency: New York-Presbyterian Brooklyn Methodist Hospital

Specialty: Treatment of thoracic, gynecologic, and head and neck cancers using advanced treatment techniques including stereotactic radiosurgery (SRS), stereotactic body radiotherapy (SBRT), and high dose-rate (HDR) brachytherapy. Through clinical care, resident education, and research, his goals are to improve long-term outcomes for his patients by improving efficacy, minimizing toxicity, ensuring treatment value and affordability, and exploring the potential synergies of radiation therapy with immunotherapy, all within a patient-centered treatment approach and clinical trials.

Meet Our Doctor Video: Dr. Mark Ashamalla

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 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

 

Alexander M. Stessin, MD, PhD
Assistant 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

 

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.    

Zhigang Xu, PhD
Associate Professor, Radiation Oncology, and Director of Medical Physicist

Board Certification: Therapeutic Radiologic Physics 

Specialty: HDR Brachytherapy, Machine, and Quality Assurance, Radiation Shielding Design, Secure Electronic Medical Records Sharing using Blockchain Technology

Jinkoo Kim, PhD
Associate Professor, Radiation Oncology, Medical Physicist

Board Certification: Therapeutic Radiologic Physics 

Specialty: Image-Guided Radiation Therapy, Deformable Imaging Registration, SRS/SRT/SBRT New Platform Treatment

 Xin Qian, PhD
Assistant Professor, Radiation Oncology, Medical Physicist

Board Certification: Therapeutic Radiologic Physics 

Specialty: Image-Guided Radiation Therapy, Small Field Dosimetry, 3D Dosimetry

An Ting Hsia, MS
Radiation Oncology, Medical Physicist

Board Certification: Therapeutic Radiologic Physics 

Specialty: Image-Guided Radiation Therapy, SRS/SRT/SBRT Treatment

Siming Lu, MS
Radiation Oncology, Medical Physicist

Board Certification: Therapeutic Radiologic Physics 

Specialty: Image-Guided Radiation Therapy, SRS/SRT/SBRT Treatment