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Craniospinal RT

 

 

Sample Plan PRONE

 

 

This young child with medulloblastoma was treated with technique described above.

First two figures illustrate the dose distribution for a pair of lateral cranial fields.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Next figures illustrate the dose distribution for single posterior spine field matched to brain.  Dose uniformity is achieved with custom designed dose compensator.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dose Prescription

Spinal dose:  prescribed at the anterior surface of the spinal cord (post surface of vertebral bodies)

Cranial dose:  prescribed at midplane at center of cranial volume (prescription point at or near the center of the target).

Dose uniformity – dose variations within each target volume should be within + 5%  and – 5% of the prescription point dose.

 

 

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