Dosimetry of a linear accelerator under respiratory gating

A comparison of the respiratory signals acquired by different respiratory monitoring systems used in respiratory gated radiotherapy

“…3.0A, Anzai MEDICAL, Shinagawa, Tokyo͒. 14,17,19,23 The RPM system consists of a marker block ͑with two infrared reflecting dots͒, an infrared camera, and a control personal computer ͑PC͒. The marker block is placed on the abdominal surface of the patient, and the position of the infrared marker is defined on the basis of the images captured by the infrared camera.…”

“…9,10 To date, several respiratory monitoring systems have been developed on the basis of surrogate signals of respiration, such as abdominal displacement, abdominal volume, and pulmonary ventilation. [11][12][13][14][15][16][17][18][19] The images acquired by 4DPET/CT are sorted according to the signals generated by the respiratory monitoring system such that they represent individual respiratory phases. These images can be reconstructed on the basis of either the amplitude or the phase of the respiratory signals by using the amplitude-based binning method or phase-based binning method, respectively.…”

Gating characteristics of an Elekta radiotherapy treatment unit measured with three types of detector

“…Previous authors have reported gating results for three manufacturers: Varian Wang 2000 andJin andYin 2005); Siemens (Kriminski et al 2006 andWeibert et al 2009) and Brainlab (Hugo et al 2003 andVerellen et al 2003). The Varian system uses a gridded gun for gating.…”

Technical aspects of real time positron emission tracking for gated radiotherapy

“…Weibert et al suggest that the dosimetry, which varies between individual linacs, should be carefully assessed before introducing a new respiratory gating system into clinical use. 48 An absolute dosimetric evaluation is thus better left to the commissioning of PeTrack-based gating at F. 10.…”