A Macintosh-based multi-energy data acquisition system for gamma cameras

Author

Buchbinder, Steven ; Clinthorne, Neal H. ; Petrick, Nicholas ; Wang, Xiaohan ; Koral, Kenneth F.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

39

Issue

4

fYear

1992

fDate

8/1/1992 12:00:00 AM

Firstpage

864

Lastpage

868

Abstract

A multi-energy data acquisition system based on the Macintosh II computer and a commercial ADC subsystem has been developed to allow the application of sophisticated Compton-scatter correction procedures. The system digitizes position and energy signals from the camera to 12 bits, bins the data into images, and transfers the data via an Ethernet interface to a computer network for reconstruction and analysis. The system also provides the necessary gantry control signals for tomographic acquisition. In a preliminary application, the system has been used along with polynomial nonlinear spectral fitting, which can account for shifts in the energy spectrum, to estimate scatter fractions for a hot, off-axis sphere in a cold, cylindrical phantom. The radioisotope was ^99mTc. The resultant scatter fractions displayed the expected symmetry with camera angle, and dependence on the amount of scattering material between the source and camera

Keywords

analogue-digital conversion; data acquisition; gamma-ray apparatus; nuclear electronics; physics computing; ^99mTc; Compton-scatter correction procedures; Ethernet interface; Macintosh II computer; Macintosh-based multi-energy data acquisition system; commercial ADC subsystem; computer network; cylindrical phantom; energy signals; energy spectrum; gamma cameras; gantry control signals; off-axis sphere; polynomial nonlinear spectral fitting; position; scatter fractions; tomographic acquisition; Application software; Cameras; Computer networks; Control systems; Data acquisition; Ethernet networks; Image analysis; Image reconstruction; Scattering; Signal analysis;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.159722

Filename

159722