Effect of collimator angle on HyperArc stereotactic radiosurgery planning for single and multiple brain metastases

We assessed the effect of collimator angle on the dosimetric parameters for targets and organs at risk (OARs) for collimator-optimized HA (CO-HA) and non-CO-HA (nCO-HA) plans. The nCO-HA and CO-HA plans were retrospectively generated for 26 patients (1 to 8 brain metastases). The dosimetric parameters for planning target volume (homogeneity index [HI]; conformity index [CI]; gradient index [GI]) and for OARs were compared. The modulation complexity score for volumetric modulated arc therapy (MCSV) and monitor units (MUs) were calculated.

Source: Medical Dosimetry - August 1, 2019 Category: Radiology Authors: Shingo Ohira, Tomohiro Sagawa, Yoshihiro Ueda, Shoki Inui, Akira Masaoka, Yuichi Akino, Hirokazu Mizuno, Masayoshi Miyazaki, Masahiko Koizumi, Teruki Teshima Source Type: research