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Proceedings Paper

Evaluation of handheld gamma camera with 1-mm NaI(T1) pixels
Author(s): Yuko Yamaguchi; Lawrence R. MacDonald; Bradley E. Patt; Jan S. Iwanczyk; John Nathan Aarsvold; Robert A. Mintzer; Naomi P. Alazraki; Carmen M. Greene
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Paper Abstract

A high resolution, hand-held gamma camera has been constructed for use in pre-surgical and intra-operative lymphoscintigraphy. In this paper, we evaluate a compact gamma camera system utilizing NaI(Tl) as a more likely candidate for scintillator due to its greater light yield and faster decay time than CsI(Na) used in an earlier prototype. Using NaI(Tl), the system mean energy resolution is 13% FWHM at 122keV, as compared to 28% in the system with CsI(Na). The highly compact detector head has a 2-cm by 2-cm field of view (FOV) and 1.25-mm intrinsic spatial resolution. Sensitivity of the NaI(Tl) camera was compared with the CsI(Na) camera. At 1cm distance from the tip of collimator, pinhole sensitivity was 58 cps/μCi for the Na(Tl) camera and 37 cps/μCi for the CsI(Na) camera.

Paper Details

Date Published: 26 November 2002
PDF: 11 pages
Proc. SPIE 4786, Penetrating Radiation Systems and Applications IV, (26 November 2002); doi: 10.1117/12.456318
Show Author Affiliations
Yuko Yamaguchi, Photon Imaging, Inc. (United States)
Lawrence R. MacDonald, Photon Imaging, Inc. (United States)
Bradley E. Patt, Photon Imaging, Inc. (United States)
Jan S. Iwanczyk, Photon Imaging, Inc. (United States)
John Nathan Aarsvold, Emory Univ. (United States)
Veterans Affairs Medical Center Atlanta (United States)
Robert A. Mintzer, Emory Univ. (United States)
Veterans Affairs Medical Center Atlanta (United States)
Naomi P. Alazraki, Emory Univ. (United States)
Veterans Affairs Medical Center Atlanta (United States)
Carmen M. Greene, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 4786:
Penetrating Radiation Systems and Applications IV
H. Bradford Barber; Hans Roehrig; F. Patrick Doty; Lisa J. Porter; Edward J. Morton, Editor(s)

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