Evaluation of handheld gamma camera with 1-mm NaI(T1) pixels

Yuko Yamaguchi; Lawrence R. MacDonald; Bradley E. Patt; Jan S. Iwanczyk; John Nathan Aarsvold; Robert A. Mintzer; Naomi P. Alazraki; Carmen M. Greene

doi:10.1117/12.456318

26 November 2002 Evaluation of hand-held gamma camera with 1-mm NaI(Tl) pixels

Yuko Yamaguchi, Lawrence R. MacDonald, Bradley E. Patt, Jan S. Iwanczyk, John Nathan Aarsvold, Robert A. Mintzer, Naomi P. Alazraki, Carmen M. Greene

Author Affiliations +

Proceedings Volume 4786, Penetrating Radiation Systems and Applications IV; (2002) https://doi.org/10.1117/12.456318
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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.

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Yuko Yamaguchi, Lawrence R. MacDonald, Bradley E. Patt, Jan S. Iwanczyk, John Nathan Aarsvold, Robert A. Mintzer, Naomi P. Alazraki, and Carmen M. Greene "Evaluation of hand-held gamma camera with 1-mm NaI(Tl) pixels", Proc. SPIE 4786, Penetrating Radiation Systems and Applications IV, (26 November 2002); https://doi.org/10.1117/12.456318

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