The dose magnifying glass quality assurance system for daily proton therapy range verification.

Proton therapy has a distinct dosimetric advantage over conventional photon therapy due to its Bragg peak profile. This allows greater accuracy in dose delivery and dose conformation to the target, however it requires greater precision in setup, delivery and for quality assurance (QA) procedures. The AAPM TG 224 report recommends daily range and spot position checks with tolerance on the order of a millimetre.

Two-dimensional solid-state array detectors: A technique for in vivo dose verification in a variable effective area.

Purpose: We introduce a technique that employs a 2D detector in transmission mode (TM) to verify dose maps at a depth of d in Solid Water. TM measurements, when taken at a different surface-to-detector distance (SDD), allow for the area at d (in which the dose map is calculated) to be adjusted.

Methods: We considered the detector prototype "MP512" (an array of 512 diode-sensitive volumes, 2 mm spatial resolution).

2D monolithic silicon-diode array detectors in megavoltage photon beams: does the fabrication technology matter? A medical physicist's perspective.

A family of prototype 2D monolithic silicon-diode array detectors (MP512, Duo, Octa) has been proposed by the Centre for Medical Radiation Physics, University of Wollongong (Australia) for relative dosimetry in small megavoltage photon beams. These detectors, which differ in the topology of their 512 sensitive volumes, were originally fabricated on bulk p-type substrates. More recently, they have also been fabricated on epitaxial p-type substrates.

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

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.

Real-time high spatial resolution dose verification in stereotactic motion adaptive arc radiotherapy.

Purpose: Radiation treatments delivered with real-time multileaf collimator (MLC) tracking currently lack fast pretreatment or real-time quality assurance. The purpose of this study is to test a 2D silicon detector, MagicPlate-512 (MP512), in a complex clinical environment involving real-time reconfiguration of the MLC leaves during target tracking.

Methods: MP512 was placed in the center of a solid water phantom and mounted on a motion platform used to simulate three different patient motions.