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Saint Raphael's was one of the first centers in the state to offer 3DCRT,
which constructs a three-dimensional view of certain tumors. A dosimetrist
- a medical professional whose expertise is determining and measuring exact
amounts of radiation to be given during therapy - uses computer modeling
technology to precisely pinpoint the tumor’s shape, size and location. Radiation
beams are then positioned to conform to the shape and size of the tumor and
aggressively attack it from several directions. 3DCT uses CT Scans
to visualize the size and shape of tumors to deliver radiation therapy more accurately,
saving surrounding tissue from harm.
Three-dimensional treatment planning provides more detail than a two-dimensional view
can, allowing exact amounts of radiation to be accurately delivered. Learn more about
external beam radiation therapy and three-dimensional planning here.
Here is what you can expect during a typical 3-D planning session:
- You will be immobilized and fitted with a custom-made plastic mask.
- A CT scan is taken with the mask in place.
- The CT scan images are transferred to a 3-D treatment-planning computer.
- The physician outlines the radiation target and critical structures on the CT scan images.
- Computer-assisted technology allows the radiation planning team to develop a plan that maximizes the dose to the target, while limiting doses to normal tissues.
- The beams are marked directly onto the custom-fitted mask.
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