Radiation Oncology Therapy | Treatment | MedStar Health

The most advanced, targeted, and personalized radiation oncology therapies

Our team of highly experienced, specialized physicians is dedicated to providing personalized, high-quality radiation therapies for a wide range of conditions. We combine our medical expertise with state-of-the-art technology and access to the latest clinical research to deliver treatment options that can improve outcomes and your quality of life.

We cover the full continuum of care: from screening, prevention, research, diagnosis, and treatment, to a personalized cancer rehabilitation program created just for you.

Our goal is to help you heal and recover by providing a full suite of radiation oncology treatments at our ambulatory or hospital-based centers close to where you live and work.

About radiation therapy and treatment

Radiation therapy is a type of cancer treatment that uses beams of intense energy to kill cancer cells. This treatment can be delivered by a machine outside the body using external-beam radiation therapy, or it can come from radioactive material placed in the body near cancer cells using internal radiation therapy, called brachytherapy. 

The type of radiation therapy you receive depends on your individual cancer treatment plan developed by your radiation oncology team.

Patient benefits

Our expert radiation oncologists can develop treatment plans with pinpoint accuracy by using the latest treatment planning technology to map precise tumor locations. This ensures that tumors get the most effective dose while sparing healthy tissues and organs. 

Our wide range of sophisticated medical equipment allows us to treat tumors aggressively and also reduce some of the side effects of radiation treatment.



  • Brachytherapy is also known as internal radiation therapy
  • We offer high-dose rates (HDR) and low-dose rates (LDR)

Brachytherapy involves placing radioactive “seeds” inside the body near a tumor. The tumor receives a dose of radiation while limiting the radiation exposure to healthy tissue.

CyberKnife (stereotactic radiosurgery)

  • CyberKnife robotic surgery is painless and does not require incisions 
  • This radiation therapy uses a concentrated beam of photons (or X-rays) to target tumors anywhere in the body, while limiting exposure to nearby healthy tissue

Unlike conventional radiation therapy that may take multiple sessions, CyberKnife is complete after only a few treatments. For example, with CyberKnife, we can treat prostate cancer in five treatments versus 40 treatments.

The Edge radiosurgery system

  • Non-invasive alternative to conventional surgery
  • Targets tumors that are difficult to reach using conventional surgery

The Edge radiosurgery system offers a new line of defense in the fight against cancer. It delivers radiation to each part of the tumor from many different angles, minimizing the radiation dose to adjacent healthy tissue.

ZAP-X gyroscopic radiosurgery system

  • MedStar Health was the first healthcare organization on the East Coast, and third in the world, to offer ZAP-X gyroscopic stereotactic radiosurgery (SRS) for brain tumors

This novel technology is non-invasive, requiring no surgical incision. The procedure can be performed on an outpatient basis, often with little to no patient recovery time.

Halcyon image-guided radiotherapy (IMRT)

  • Halcyon is the latest linear accelerator
  • We are the first healthcare system to offer this novel therapy in the Maryland, Virginia, and Washington, D.C., region

Halcyon leading-edge technology precisely targets the tumor while providing treatment in half the time–and in an environment that’s more comfortable than ever before.

Intraoperative radiation therapy (IORT)

  • An alternative for women with early-stage breast cancer
  • Delivered in a single dose

IORT is given following a partial mastectomy (lumpectomy) while the patient is still in the operating room.

Radiation therapy for pancreatic cancers

Combining surgery with intraoperative radiation therapy (IORT) can reduce the possibility of a pancreas tumor’s return and help patients live longer. IORT is a focused radiation treatment given during surgery and applied directly to the targeted area or tumor, ensuring that normal surrounding tissue is spared.

The benefits of IORT include:

  • Lower recurrence rates: Researchers found that using IORT in pancreatic cancer patients during resection surgery was associated with longer survival times. One study found that IORT patients had a median survival of nearly one year more than those who did not receive IORT.
  • Safe treatment with fewer side effects: This advanced radiation treatment option is safe and effective when combined with surgery. It allows the radiologist greater and more direct access to the site of the cancer, sparing healthy tissue nearby.
  • Short treatment duration: IORT is completed in matter of minutes during surgery.
  • Treatment of advanced pancreatic malignancy: Patients with tumors that are more challenging to remove or close to critical structures.

Proton therapy with HYPERSCAN technology

  • We are the first and most experienced facility to offer proton therapy in the Washington, D.C., region
  • We are the first in the world to offer the most advanced proton therapy with HYPERSCAN technology (intensity modulated proton therapy--IMPT)

This highly advanced form of radiation treatment destroys cancer cells with protons, positively charged particles.

More precise than traditional radiation, proton therapy treatment targets tumors by matching their exact shape and size, sparing surrounding healthy tissue and resulting in fewer side effects. Proton therapy also reduces the potential for secondary cancers.

Full spectrum of treatment options

We also offer patients the variety of other treatment options listed below, each with its own unique benefits:

  • Advanced computerized treatment planning, image fusion, and verification systems
  • Conventional radiation therapy
  • Image-guided radiation therapy (IGRT)
  • Intensity modulated radiation therapy (IMRT)
  • Partial breast irradiation with both external beam therapy and brachytherapy
  • Positron emission tomography (PET) and computed tomography (CT) simulation
  • RapidArc volumetric arc therapy (VMAT)
  • Respiratory gating
  • State-of-the-art 4-D large-bore computerized tomography (CT) simulator
  • Total skin electron irradiation (TSEI), the region’s only location for this type of treatment


We are experts in helping patients with their treatment for the following cancers:

A team approach to care

We have a team approach to cancer, with board-certified specialists in numerous disciplines. Our specialists use the most advanced therapies available, tailored to meet your needs--and improve the quality of your life. Our team includes:

  • Radiation oncology specialists
  • Medical oncology
  • Surgeons
  • Pathologists
  • Physicists
  • Radiologists
  • Radiation therapists
  • Dosimetrists
  • Nurses
  • Nurse navigators
  • Social workers
  • Administrative support staff

Care available through MedStar Georgetown Cancer Institute

MedStar Georgetown Cancer Institute combines medical expertise, the latest therapies, and research across MedStar Health. Georgetown Lombardi Comprehensive Cancer Center–the Washington, D.C., region’s only National Cancer Institute-designated comprehensive cancer center–serves as our research engine. This partnership allows you access to cutting-edge clinical trials and the latest breakthroughs in cancer care. 

Our nationally recognized doctors offer screening, prevention, research, diagnosis, treatment, personalized rehabilitation, and survivorship programs at multiple locations, close to where you live and work. Our experts specialize in the particular type of cancer you have, and work together to develop a customized care plan targeting your unique cancer. This often leads to better outcomes, and more importantly, hope.

Our providers

Oncologist giving IV Drip Treatment to Cancer Patient

Expert radiation oncology care

Getting the care you need starts with seeing one of our radiation oncology specialists.

Our locations

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MedStar Health: Radiation Oncology at MedStar Georgetown University Hospital

3800 Reservoir Rd., NW
Lower Level (LL)
Bles Building
Washington, DC 20007

MedStar Health: CyberKnife at MedStar Georgetown University Hospital

3800 Reservoir Rd., NW
CB-18 Lower Level (LL) Bles Bldg.
Washington, DC 20007

MedStar Health: CyberKnife Center at MedStar Franklin Square Medical Center

9103 Franklin Square Dr.
Suite 100
Baltimore, MD 21237

More information

Clinical Partner to a National Cancer Institute-Comprehensive Cancer Center

MedStar Health is the clinical partner of Georgetown Lombardi Comprehensive Cancer Center, the only National Cancer Institute (NCI)-designated comprehensive cancer center in the Washington, D.C., region. It serves as our research engine. 

This partnership allows patients to access the latest breakthroughs in cancer care. Of the 1,500+ cancer programs across the country, only 51 (or 3%) of those centers are awarded this prestigious designation. 

By developing and testing new ways to combat cancer through cutting-edge clinical trials, we can discover breakthrough advancements designed to help our current and future patients.

The advantage of clinical trials

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Research and education

Research innovations

Learn how our collaborative research accelerates treatment innovations and enhances patient outcomes.

MedStar Health Research Institute  

MedStar Georgetown University Hospital Lombardi Comprehensive Cancer Center 

Educational opportunities

The Radiation Research Division is at the forefront of academic molecular investigations into cancer cells that are radiation-resistant.

Radiation Oncology Residency at MedStar Georgetown University Hospital