To synchronize the radiation of microSelectron-HDR (Nucletron afterloading machine) and measurement of MOSFET dose system, a trigger system based on interface circuit was designed and corresponding monitor and trigger program were developed on Qt platform. This interface and control system was tested and showed stable operate and reliable work. This adopted serial port detect technique may expand to trigger application of other medical devices.
Equipment Design ; Radiotherapy Dosage ; Radiotherapy, Computer-Assisted ; instrumentation ; methods

UNLABELLEDThe aim of this study is to investigate the characteristics of Elekta delivery system for volumetric modulated arc therapy (VMAT). Five VMAT plans were delivered in service mode and dose rates, and speed of gantry and MLC leaves were analyzed by log files. Results showed that dose rates varied between 6 dose rates. Gantry and MLC leaf speed dynamically varied during delivery.

CONCLUSIONThe technique of VMAT requires linac to dynamically control more parameters, and these key dynamic variables during VMAT delivery can be checked by log files. Quality assurance procedure should be carried out for VMAT related parameter.

Humans ; Particle Accelerators ; Radiotherapy Dosage ; Radiotherapy, Intensity-Modulated ; instrumentation ; methods

In this paper, the principle of computer vision was introduced and several typical radiotherapy devices based on computer vision were described, including their principle and applications.
Audiovisual Aids ; Imaging, Three-Dimensional ; Radiotherapy, Computer-Assisted ; methods ; Software