3DCRT (3 Dimensional Conformal Radiotherapy)
3DCRT uses computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), or a combination of PET and CT scans to create a customized radiation distribution to deliver doses of radiation that conform to the exact 3D shape and size of a tumor. This technique allows for the maximum allowable dose of radiation to the tumor while minimizing damage to surrounding healthy tissue.
3DCRT Planning Includes
- Making 3-D images of the tumor
- Ensuring the linear accelerator produces beams in the exact shape of the tumor
- Optimizing the dose of radiation for each treatment session
- Verifying that the dose of radiation needed to treat the tumor is correct
- Adjusting doses as necessary
- Marking your skin to help ensure precision during each treatment session
- Creating casts or molds to help you remain immobilized during treatment
- Since radiation is focused precisely on the tumor and not the surrounding healthy tissue, it is important for you to remain still during the treatment process. This way, the radiation therapy remains directed at the tumor instead of damaging healthy tissue.
- The location of some tumors can lead to awkward or uncomfortable positioning, so masks, casts, and other devices may be used to help you stay in place.
3DCRT takes place in small, frequent doses followed by short weekend breaks. This structure allows healthy tissue surrounding the tumor to heal. The total amount of radiation required for a tumor will depend on the size and location of the tumor, type of tumor, and patient’s overall health. The less radiation required, the shorter the duration of the therapy.
What is the 3D Conformal Radiation Therapy Process?
3D Conformal Radiation Therapy (3DCRT) is not a single procedure, but takes place over multiple sessions. These small but frequent doses of radiation allow healthy tissues surrounding a tumor to heal. The duration of an individual’s procedure depends on the amount of radiation needed, the size and location of the tumor, the type of tumor, and the patient’s health.
Your radiation oncologist first plans your entire treatment, and then works with a specialized team to ensure safe and accurate delivery of 3DCRT.
