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Proceedings Paper

Performance evaluation of dedicated compact scintillation cameras
Author(s): David P. McElroy; Edward J. Hoffman; Lawrence R. MacDonald; Bradley E. Patt; Jan S. Iwanczyk; Yuko Yamaguchi
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Paper Abstract

As part of the development of dedicated scintillation cameras, we compared the performances of 2 dedicated cameras with a standard clinical camera. The dedicated cameras were based on Position Sensitive Photo multipliers (PSPMTs): first, a single PSPMT coupled to a 6 by 6 by 0.6 cm NaI(Tl) crystal and second, multiple-PSPMTs coupled to a matrix of 2 by 2 by 6 mm NaI(Tl) crystal with hexagonal hole collimator. Image resolution was measured with all cameras as a function of depth. The ability of the cameras to measure small superficial tumors was tested with a phantom consisting of 6 hot cylindrical tumors of height 3 mm and varying diameters against a warm background of 4,1 cm cylinders. Tumors were stepped through the background and imaged at each level, starting at the collimator face, using a tumor to background activity concentration ratio of 10:1 and adjusting the imaging time for each to compensate for decay. Images were made of an anthropomorphic human thorax phantom with simulated breast lesions and detectability between the multi-PSPMT camera and the clinical camera was compared. The improve performance of dedicated cameras in specific tasks suggests that these devices will have a role in scintimammography and assisting in O.R. procedures such as sentinel node dissection and other shallow depth of field applications.

Paper Details

Date Published: 18 December 2000
PDF: 11 pages
Proc. SPIE 4142, Penetrating Radiation Systems and Applications II, (18 December 2000); doi: 10.1117/12.410567
Show Author Affiliations
David P. McElroy, UCLA School of Medicine (United States)
Edward J. Hoffman, UCLA School of Medicine (United States)
Lawrence R. MacDonald, Gamma Medica Instruments, Inc. (United States)
Bradley E. Patt, Gamma Medica Instruments, Inc. (United States)
Jan S. Iwanczyk, Gamma Medica Instruments, Inc. (United States)
Yuko Yamaguchi, Gamma Medica Instruments, Inc. (United States)

Published in SPIE Proceedings Vol. 4142:
Penetrating Radiation Systems and Applications II
F. Patrick Doty; H. Bradford Barber; Hans Roehrig; Edward J. Morton, Editor(s)

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