Virtual Micro MLC Commissioning

Virtual micro MLC commissioning

The resolution of multileaf collimators (MLCs) is limited by their finite leaf width. A commercial package (HD-270) uses 3D couch translation and leaf adjustments to emulate smaller leaf widths. In this paper, we report on the commissioning of this feature using software testing, dial gauge measurements, and film dosimetry. We also identify a variety of limitations: software bugs and truncation...

Virtual Commissioning of Automated Systems

Dosimetric verification of micro‐MLC based intensity modulated radiation therapy

A methodology for the dosimetric verification of micro-multileaf collimator MMLC) based intensity modulated radiation therapy (IMRT) plans intended for stereotactic applications is described. The procedure is similar to that of conventional IMRT patient-specific quality assurance with some notable exceptions. Relative dosimetry measurements are performed with radiographic film, a commercial fil...

Commissioning of a double‐focused micro multileaf collimator (μMLC)

Double-focused muMLCs are able to create fields with steeper dose gradients at the field edges and are, therefore, an advancement in delivering stereotactic treatments. A double-focused muMLC has been installed at a Siemens Primus linear accelerator (linac) as a first research installation in Europe. The basic dosimetric parameters, such as leakage, output factors, depth-dose curves and penumbr...

AbstractID: 8933 Title: Performance of dual layer micro MLC versus standard single layer MLC for IMRT delivery

ID: 8933 Title: Performance of dual layer micro MLC versus standard single layer MLC for IMRT delivery Purpose To evaluate the performance characteristics of a first-of-its-kind dual layer micro multi-leaf collimator (DmMLC) and compare it dosimetrically with standard, single layer MLCs for use in intensity modulated radiation therapy (IMRT). Method and Materials The DmMLC performance was studi...