SBRT2015

Protec9ve!shielding! Collimator!channels! Frame-based Stereotactic Radiosurgery Positioning Accuracy Accuracy!and!stability!of!posi9oning!in!radiosurgery:!! long!–term!results!of!the!Gamma!Knife!system.! ! ! ! ! ! ! ! ! !!!!!Heck!B!et!al!

Leksell ®! Coordinate! Frame! Isocenter/! Target!in!the!brain!

Graf2Chromic2films2 densitometric!measurements! ! ! !X:!J!0.014+/J!0.09mm! ! ! !Y:!!!!0.013+/J!0.09mm! ! ! !Z:!J!0.002+/J!0.06mm!

Pa9ent!! posi9oning!system !

Radia9on!sources! ! ! All!measured!data!were!within!a!sphere!of!! 0.2mm !radius! ! 2 MRI>based2target2defini0on2 ! ! !X:!0.06+/J0.09mm! ! ! !Y:!0.04+/J0.09mm!

Med!Phys!2007!Apr;!34(4):!1487J95!