The results of studies conducted with a small field of view gamma camera based on a Position Sensitive Photomultiplier Tube (PSPMT) and a pixelized scintillator crystal, made of CsI(TI), are reported. Using a computer-controlled step motor allowing object rotation, projection data from several angles are acquired. Images of slices of the object are obtained and compared with the use of a Filtered Backprojection and a Maximum Likelihood algorithm. Phantom studies have shown a spatial resolution of 2-3 mm in both two and three dimensions, and mice experiments have shown successful SPECT imaging of small organs. 31) images obtained from a paraffin cylinder phantom and from a Tc-99m water solution phantom showed that a "hot" spot with a size down to 0.2ml can be detected with a resolution of about 2 mm if the tumor to background activity ratio is 6: 1. (C) 2002 Elsevier Science B.V. All rights reserved.
Imaging of breast phantoms using a high-resolution position sensitive photomultiplier tube / N. D., Giokaris; G. K., Loudos; D., Maintas; D., Papapanagiotou; K. S., Nikita; S. C., Archimandrits; A. D., Varvarigou; C. N., Stefanis; S., Majewski; A., Weisenberger; Pani, Roberto; Scopinaro, Francesco. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 497:1(2003), pp. 141-149. (Intervento presentato al convegno 1st Topical Symposium on Functional Breast Imaging with Advanced Detectors tenutosi a ROME, ITALY nel APR 18-21, 2001) [10.1016/s0168-9002(02)01904-6].
Imaging of breast phantoms using a high-resolution position sensitive photomultiplier tube
PANI, Roberto;SCOPINARO, Francesco
2003
Abstract
The results of studies conducted with a small field of view gamma camera based on a Position Sensitive Photomultiplier Tube (PSPMT) and a pixelized scintillator crystal, made of CsI(TI), are reported. Using a computer-controlled step motor allowing object rotation, projection data from several angles are acquired. Images of slices of the object are obtained and compared with the use of a Filtered Backprojection and a Maximum Likelihood algorithm. Phantom studies have shown a spatial resolution of 2-3 mm in both two and three dimensions, and mice experiments have shown successful SPECT imaging of small organs. 31) images obtained from a paraffin cylinder phantom and from a Tc-99m water solution phantom showed that a "hot" spot with a size down to 0.2ml can be detected with a resolution of about 2 mm if the tumor to background activity ratio is 6: 1. (C) 2002 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
