AX-PET is a novel PET concept based on long crystals axially arranged and orthogonal Wavelength shifter (WLS) strips, both individually readout by Geiger-mode Avalanche Photo Diodes (G-APD). Its design was conceived in order to reduce the parallax error and simultaneously improve spatial resolution and sensitivity. The assessment of the AX-PET concept and potential was carried out through a set of measurements comprising individual module characterizations and scans in coincidence mode of point-like and extended sources. The estimated energy and spatial resolutions from point-like measurements are R FWHM11.6% (at 511 keV) and 1.7-1.9 mm (FWHM) respectively as measured with point-like sources placed in different positions of the FOV. First results from scans of extended phantoms confirmed our expectations. © 2010 IEEE.
AX-PET: Concept, proof of principle and first results with phantoms / P., Beltrame; E., Bolle; A., Braem; C., Casella; E., Chesi; N., Clinthorne; R. D., Leo; G., Dissertori; L., Djambazov; V., Fanti; C., Joram; H., Kagan; W., Lustermann; Meddi, Franco; E., Nappi; F., Nessi Tedaldi; J. F., Oliver; F., Pauss; M., Rafecas; D., Renker; A., Rudge; U., Ruotsalainen; D., Schinzel; T., Schneider; J., Seguinot; P., Solevi; S., Stapnes; U., Tuna; P., Weilhammer. - STAMPA. - (2010), pp. 2754-2757. (Intervento presentato al convegno 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 tenutosi a Knoxville; United States nel 30 October 2010 through 6 November 2010) [10.1109/nssmic.2010.5874294].
AX-PET: Concept, proof of principle and first results with phantoms
MEDDI, Franco;
2010
Abstract
AX-PET is a novel PET concept based on long crystals axially arranged and orthogonal Wavelength shifter (WLS) strips, both individually readout by Geiger-mode Avalanche Photo Diodes (G-APD). Its design was conceived in order to reduce the parallax error and simultaneously improve spatial resolution and sensitivity. The assessment of the AX-PET concept and potential was carried out through a set of measurements comprising individual module characterizations and scans in coincidence mode of point-like and extended sources. The estimated energy and spatial resolutions from point-like measurements are R FWHM11.6% (at 511 keV) and 1.7-1.9 mm (FWHM) respectively as measured with point-like sources placed in different positions of the FOV. First results from scans of extended phantoms confirmed our expectations. © 2010 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
