Course book Advanced Treatment Planning 2018

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• Patients position less well than we think • IGRT allows more accurate delivery of dose ➢ Deliver the dose to where you planned ➢ ? Reduce PTV margins (don’t over-reduce)

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Reduces total patient dose (integral dose)

➢ Delivers dose more precisely to target and normal tissue ➢ Especially important with steep dose gradients

15

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Prostate

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13

12

11

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Skin set up

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9

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Pelvic bone EPID

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7

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Seed IGRT

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5

3D Displacement (mm)

4

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2

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(Dr Yvonne Rimmer)

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Skin set-up

Bone

Seeds