Journal article

CyberKnife (R) fixed cone and Iris (TM) defined small radiation fields: Assessment with a high-resolution solid-state detector array

Giordano Biasi, Marco Petasecca, Susanna Guatelli, Ebert A Martin, Garry Grogan, Benjamin Hug, Jonathan Lane, Vladimir Perevertaylo, Tomas Kron, Anatoly B Rosenfeld

JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS | WILEY | Published : 2018

Abstract

PURPOSE: The challenges of accurate dosimetry for stereotactic radiotherapy (SRT) with small unflattened radiation fields have been widely reported in the literature. In this case, suitable dosimeters would have to offer a submillimeter spatial resolution. The CyberKnife® (Accuray Inc., Sunnyvale, CA, USA) is an SRT-dedicated linear accelerator (linac), which can deliver treatments with submillimeter positional accuracy using circular fields. Beams are delivered with the desired field size using fixed cones, the InCise™ multileaf collimator or a dynamic variable-aperture Iris™ collimator. The latter, allowing for field sizes to be varied during treatment delivery, has the potential to decrea..

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