Novel gaseous detectors for medical imaging
2004 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 518, no 1-2, 406-410 p.Article in journal (Refereed) Published
We have developed and successfully tested prototypes of two new types of gaseous detectors for medical imaging purposes. The first one is called the Electronic Portal Imaging Device (EPID). It is oriented on monitoring and the precise alignment of the therapeutic cancer treatment beam (pulsed gamma radiation) with respect to the patient's tumor position. The latest will be determined from an X-ray image of the patient obtained in the time intervals between the gamma pulses. The detector is based on a sandwich of hole-type gaseous detectors (GEM and glass microcapillary plates) with metallic gamma and X-ray converters coated with CsI layers. The second detector is an X-ray image scanner oriented on mammography and other radiographic applications. It is based on specially developed by us high rate RPCs that are able to operate at rates of 10(5) HZ/mm(2) with a position resolution better than 50 mum at 1 atm. The quality of the images obtained with the latest version of this device were in most cases more superior than those obtained from commercially available detectors.
Place, publisher, year, edition, pages
2004. Vol. 518, no 1-2, 406-410 p.
RPC, x-ray imaging, CsI, capillary plate, chambers
IdentifiersURN: urn:nbn:se:kth:diva-23174DOI: 10.1016/j.nima.2003.11.038ISI: 000188961100114ScopusID: 2-s2.0-0942288160OAI: oai:DiVA.org:kth-23174DiVA: diva2:341872
QC 20100525 QC 201110192010-08-102010-08-102011-10-19Bibliographically approved