Title :
Using a Monolithic Active Pixel Sensor for Monitoring Multileaf Collimator Positions in Intensity Modulated Radiotherapy
Author :
Page, Ryan F. ; Abbott, Natalie L. ; Davies, John ; Dyke, Emma L. ; Randles, Heather J. ; Velthuis, J.J. ; Fletcher, Sam ; Gregory, Shaun D. ; Hall, C. ; John, Anne-Marie ; Lawrence, H. ; Stevens, Paul H. ; Hugtenburg, Richard P. ; Tunbridge, Victoria
Author_Institution :
H.H. Wills Phys. Lab., Univ. of Bristol, Bristol, UK
Abstract :
To enable in-vivo monitoring of Intensity Modulated Radiotherapy (IMRT) with minimal attenuation of the treatment field, an upstream camera system based on a Monolithic Active Pixel Sensor (MAPS) has been developed. This system has been used to precisely reconstruct the position of the Multileaf Collimators (MLC) that are used to shape the treatment field. The results show the position of a MLC is known with a precision of 6 μm with 10 seconds worth of data and 52 ±4 μm for a single frame.
Keywords :
CMOS image sensors; biomedical equipment; collimators; radiation therapy; MAPS; MLC position precision; MLC position reconstruction; in-vivo IMRT monitoring; intensity modulated radiotherapy; minimal treatment field attenuation; monolithic active pixel sensor; multileaf collimator position monitoring; time 10 s; treatment field shaping; upstream camera system; Active pixel sensors; Attenuation; Cameras; Collimators; Educational institutions; Image reconstruction; Monitoring; CMOS image sensors; image sensors; oncology; radiation detectors; radiation imaging; silicon radiation detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2013.2287609
