Radiation Medicine at MedStar Georgetown


The Department of Radiation Oncology at MedStar Georgetown University Hospital is dedicated to promoting health and wellness through expert and compassionate clinical care. By providing research offerings, leadership training, and cutting-edge technology, we are able to offer patients the most advanced cancer treatment options in one multidisciplinary clinic.

MedStar Georgetown is proud to be the the first and most experienced facility in the Washington, D.C. region to offer proton therapy with advanced HYPERSCAN technology. In addition, MedStar Georgetown was the first hospital on the East Coast and the one of the only hospitals in the Washington, D.C., metropolitan area to offer the CyberKnife® image-guided radiosurgery system. Our program offers all available radiation modalities under one roof to include:

  • Proton therapy with HYPERSCAN™(intensity-modulated proton therapy)
  • CyberKnife® (stereotactic radiosurgery and stereotactic body radiosurgery)
  • Intensity-modulated radiation therapy (IMRT)
  • Image-guided radiation therapy (IGRT)
  • RapidArc
  • Brachytherapy
  • Intraoperative radiation
  • Conventional radiation

We have extensive experience performing procedures for spine, lung, prostate, and gastroenterology (GI) tumors, as well as intracranial and skull-based lesions.

Radiation therapy services are provided on both an inpatient and outpatient basis. Additionally, we are an integral part of the Georgetown Lombardi Comprehensive Cancer Center, the only National Cancer Institute (NCI)-designated comprehensive cancer center in the Washington, D.C., area.

Make an Appointment

For more information or to schedule an appointment with a radiation oncologist, call our scheduling line: 


Radiation Oncologists

Clinical Research

The Department of Radiation Oncology conducts continuing clinical research that focuses on ways to more effectively and safely treat tumors with radiation while minimizing the amount of radiation critical organs and nearby healthy tissue receive. This research includes:

  • National Cooperative Group (ALGB/RTOG)
  • Total Body Irradiation for Bone Marrow Transplantation
  • Partial Breast Irradiation
  • Modeling Treatment for Cancer with Radiation Therapy and Chemotherapy
  • CyberKnife Protocols

Clinical Trials

Learn more about clinical trials currently recruiting participants at Georgetown University's Lombardi Comprehensive Cancer Center.

Areas of Expertise

Breast Cancer Care

Our patient centered-approach to breast cancer care emphasizes a close collaboration between the radiation oncologist and the entire multidisciplinary breast team. We offer our patients insights from specialties across the spectrum of breast cancer care, in radiology, pathology, surgery, medical oncology, and genetics. Patients can see individual members of the team or choose to participate in a multidisciplinary breast clinic to see multiple specialties in one day. Breast cancer radiation therapy is led by Dr. Sonali Rudra, who is the service director for the Breast Radiation Oncology program.

At our facility, we have access to multiple treatment options in one center, including 3D conformal radiation therapy, partial breast irradiation, CyberKnife, IORT, and proton therapy. Each patient is assessed and treated with the treatment modality that is best suited for them. We also offer multiple clinical trial opportunities that are available to eligible patients.

Central Nervous System Cancer Care

Patients with central nervous system tumors or arteriovenous malformations come to us for responsive and individualized treatment. Our team of experts has all of the radiation technology at our fingertips to tailor therapy to each patient’s care. Led by Dr. Brian Collins, medical director of the Department of Radiation Medicine, we strive to create an open, honest, caring, and accessible environment for our patients.

We specialize in helping our patients navigate their many options for radiation therapy, including advanced options like proton therapy and image-guided radiation therapy. We are at the forefront of cancer care, pioneering the latest CyberKnife treatment protocols. 

Gastrointestinal Cancer Care

We offer gastrointestinal (GI) cancer patients expert clinical care, advanced radiation therapy options, and a patient-centered approach. Our clinical team, led by Dr. Keith Unger, specializes in radiation therapy for GI cancers, offering personalized and comprehensive cancer care for conditions including esophagogastric, liver, bile duct, bowel or intestinal, rectal, and anal cancers.

We offer clinical trial options and utilize the most advanced radiation therapies available, including proton therapy, CyberKnife, and intraoperative radiation therapy. We are one of the most experienced centers in the country in using CyberKnife to treat GI cancers (even pancreatic and liver cancers). Proton therapy is increasingly used for GI cancers, and we offer cutting edge treatment options as well as clinical trials. Our clinical and nursing teams are highly trained in the care of GI cancer patients to provide the necessary support during cancer treatment.

Head and Neck Cancer Care

The Radiation Oncology Head and Neck Service is dedicated entirely to tumors of the head and neck as well as the skull base. As an integral part of the Head & Neck Multidisciplinary Cancer group, we work closely with specialists in the other related services, including otolaryngology, head and neck surgery, medical oncology, neuroradiology, and interventional radiology as well as all of the ancillary disciplines required for comprehensive head and neck care. 

Our team features board certified radiation oncologists, each of whom underwent post-residency specialty training in head and neck cancer, and who only see and treat patients with tumors of the head, neck, or skull base. Our patients are evaluated and discussed by a multidisciplinary team to come up with the best treatment plan based on their individual needs. 

We deliver individualized radiation treatments using proton beam, robotic CyberKnife stereotactic, or highly-conformal (Rapid Arc) IMRT-VMAT. Electron beam and isotope brachytherapy are also available as indicated. Our radiation oncology doctors collaborate closely with a skilled team of nurses and nurse practitioners to provide thorough and comprehensive care to every patient.

Prostate and Other Genitourinary Cancer Care

We strive to offer the highest quality, most effective treatment options for our prostate cancer patients with a dual goal to treat the disease and assure long term quality of life. We employ a multidisciplinary team approach to diagnosis and treatment, calling on colleagues from urology, radiology, medical oncology, and radiation oncology to weigh in with insights and collaborate for optimal patient care. Our clinical team in radiation oncology is led by Dr. Sean Collins, specializing in radiation therapy for prostate cancer with IMRT and CyberKnife SBRT, and Dr. Anatoly Dritschilo, specializing in prostate brachytherapy, IMRT, and proton radiation therapy. 

We offer the most experienced clinical team in the region and provide access to the most advanced radiation therapy technologies. We are the clinical radiation oncology service of the Georgetown Lombardi Comprehensive Cancer Center and participate in clinical translational, basic science, and population science research to assure presence at the cutting edge of new discoveries and developments for prostate cancer treatment. 

Conditions Treated