Definitions Present the Tissue Phantom Ratio and Tissue Maximum Ratio equations. Describe how the two quantities are related. Define,...

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Biology

Definitions

Present the Tissue Phantom Ratio and Tissue Maximum Ratioequations. Describe

how the two quantities are related.

Define, percentage depth dose (include a sentence description,equation and

diagram).

Describe how %D at depth (dref) is affected (i.e. increased ordecreased) by

increasing field size, increasing SSD, increasing energy. Give areason for the effect in each case.

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Definitions1TISSUE PHANTOM RATIOThe TPR is defined as the ratio of the dose at a given point inphantom to the dose at the same point at a fixed reference depthusually 5 cmFormulasRelationship between the TPR and TMR areA simple model is developed which suggest that the degree towhich the TPR    See Answer
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