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

被引：2
|
作者：
Yamaguchi, Y [1 ]
MacDonald, LR [1 ]
Patt, BE [1 ]
Iwanczyk, JS [1 ]
Aarsvold, JN [1 ]
Mintzer, RA [1 ]
Alazraki, NP [1 ]
Greene, CM [1 ]
机构：
[1] Gamma Med Instruments, Div Photon Imaging Inc, Northridge, CA 91324 USA
来源：
PENETRATING RADIATION SYSTEMS AND APPLICATIONS IV | 2002年 / 4786卷
关键词：
gamma probe; scintillation camera; lymph node scintigraphy; breast cancer staging;
D O I：
10.1117/12.456318
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 Nal(TI) 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 Nal(TI), 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-min intrinsic spatial resolution. Sensitivity of the Nal(TI) camera was compared with the CsI(Na) camera. At 1 cm distance from the tip of collimator, pinhole sensitivity was 58 cps/muCi for the Na(TI) camera and 37 cps/muCi for the CsI(Na) camera.
引用
收藏
页码：103 / 113
页数：11
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