DocumentCode :
679582
Title :
Universal MV-kV imager for radiotherapy[1]
Author :
Zentai, George ; Virshup, Gary ; Ganguly, Anshuman ; Morf, Daniel
Author_Institution :
Varian Med. Syst., Ginzton Technol. Center, Palo Alto, CA, USA
fYear :
2013
fDate :
22-23 Oct. 2013
Firstpage :
234
Lastpage :
238
Abstract :
Electronic portal mega-electronvolt (MV) monitoring for radiation therapy is very important for tumor localization. Furthermore, in the latest systems, before the radiation treatment, the patient is also positioned on the treatment bed with a flat-panel detector (FPD) based kilo-electronvolt (kV) CT scan for better soft tissue visibility. In the article we prove by measurement and imaging that a regular Cu-GOS scintillator combination on an a-Si TFT + photodiode FPD can work in reverse direction with the same efficiency as in forward direction at high energy (MV) imaging. More importantly, in reverse mode it can be used also as a kV imager because the Cu plate, which contributes towards improved imaging at MV energy, does not block the kV X-ray beams in this direction. So we can have a universal MV-kV imager integrated into one.
Keywords :
biomedical equipment; computerised tomography; patient monitoring; photodiodes; radiation therapy; scintillation; tumours; Cu plate; a-Si TFT-photodiode FPD can; computerised tomography scan; electronic portal mega-electronvolt monitoring; flat-panel detector based kilo-electron volt; forward direction; high-energy imaging; radiation therapy; radiation treatment; regular Cu-GOS scintillator; reverse direction; soft tissue visibility; treatment bed; tumor localization; universal MV-kV imager; Absorption; Energy resolution; Image resolution; Noise; Portals; X-ray imaging; X-ray imaging; portal imaging; radiation therapy;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Imaging Systems and Techniques (IST), 2013 IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5790-6
Type :
conf
DOI :
10.1109/IST.2013.6729697
Filename :
6729697
Link To Document :
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