Our Team

At Stony Brook’s Radiation Oncology Department, our focus is providing exceptional cancer care through advanced technology, innovative therapies and a compassionate, patient-centered approach.

Our multidisciplinary team collaborates to develop personalized treatment plans tailored to each patient’s unique needs. By utilizing cutting-edge techniques like intensity-modulated radiation therapy (IMRT), image-guided radiation therapy (IGRT) and stereotactic therapies, we deliver precise, effective radiation while protecting healthy tissue. With state-of-the-art planning systems, our goal is to provide fast and efficient care that achieves the best outcomes with minimal side effects.

Meet Our Team

The dedicated professionals on our Radiation Oncology team include:

  • Board-certified radiation oncologists
  • Doctor of nursing practice specializing in survivorship care
  • Board-certified medical physicists and dosimetrists
  • Board-certified radiation therapists
  • Specially-trained nurses
  • Support staff, including social workers, nutritionists, and physical therapists

This expert team works seamlessly to ensure coordinated, streamlined care, offering services such as:

  • Comprehensive clinical evaluation and staging
  • Customized radiation therapies
  • Ongoing assessment of treatment effectiveness
  • Full-spectrum follow-up care and support

Collaboration is at the heart of what we do. We work alongside referring physicians and other specialists, keeping everyone informed every step of the way, so you receive the highest level of care in a compassionate environment.

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
  • Mark Ashamalla, MD
  • Kartik Mani, MD, PhD
  • Alexander Slade, MD. PhD
  • Alexander M. Stessin, MD, PhD
  • Edward Valentine, MD
  • Clare M. Moran, DNP, FNP, RN
  • Bruce Demple, PhD
  • Zhigang Xu, PhD
  • Jinkoo Kim, PhD
  • Xin Qian, PhD
  • An Ting Hsia, MS
  • Siming Lu, MS

Physics Team

The physics team ensures precision in every radiation treatment. This team includes board-certified medical physicists, dosimetrists and senior programmers, all experienced in advanced therapies such as intensity-modulated radiation therapy (IMRT), stereotactic body radiation therapy (SBRT), radiosurgery and brachytherapy. They are responsible for maintaining the integrity of radiation treatment machines and collaborating with physicians to plan each patient's treatment.

Physicists

  • Zhigang (Josh) Xu, PhD, DABR, Chief Medical Physicist
  • Jinkoo Kim, PhD, DABR
  • Xin Qian, PhD, DABR
  • An Ting Hsia, MS, DABR
  • Siming Lu, MS, DABR

Dosimetrists

  • Sandeep Ailawadi, MS, CMD, Sr. Dosimetrist
  • Maria Kartsonis, CMD
  • Todd Yoder, MS, CMD

Radiation Therapists

Stony Brook Cancer Center Radiation Oncology Staff.

Radiation therapists are certified radiotherapy technologists who deliver treatments as prescribed by oncologists. They utilize advanced, computerized systems to ensure accurate, effective and safe treatments. Radiation therapists monitor patients throughout their therapy and maintain detailed records.

Division of Nursing

Stony Brook Cancer Center Division of Nursing Staff.

The radiation oncology nursing team provides exceptional care before, during, and after treatment. Nurses are often the first point of contact, assisting with treatment coordination, symptom management and education. The team, which includes registered nurses, clinical assistants and clerks, is committed to delivering personalized care and providing follow-up support after treatment completion.

Administrative Director

Stacey Hondropulos.

The Department of Radiation Oncology is dedicated to combining advanced technology with a patient-centered environment that prioritizes comfort and well-being. The Administrative Director oversees daily clinic operations and ensures that patients receive comprehensive support throughout their treatment.

For scheduling, billing or general inquiries, please call (631) 444-2200 or 2210. Direct questions or concerns can be sent via email to Stacey.Hondropulos@stonybrookmedicine.edu.

Stacey Hondropulos, MBA MS
Administrative Director, Radiation Oncology

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