Abstract

1937
Objectives
In this study, we evaluate the MR compatibility of a collimator material for use in a SPECT insert for simultaneous small animal SPECT/MR imaging applications.
Methods
A sample cylindrically-shaped multi-pinhole (MPH) collimator with 40 mm diameter was made by a 3D printing method using a tungsten alloy from a commercial vendor (densigy-15; 3D Systems Layerwise, Leuven, Belgium). The MPH collimator was tested for its effect on the uniformity and distortion on MR images of home-built MRI scanner with a 0.5T permanent magnet. A test phantom was placed inside a single-channel Tx/Rx RF coil that in turn was inserted into the MPH collimator. The assembly was placed in the center of the MRI scanner for image acquisition. A uniformity phantom, consisting of a hollow acrylic cylinder with an inner diameter of 15 mm and height of 50 mm, was filled with a uniform CuSO4 aqueous solution …

Date

2016

Authors

Yan Chang, Qiaoyan Chen, Andrew Rittenbach, Jingyan Xu, Mingshan Sun, Benjamin Tsui, Xiaodong Yang

Source

Journal of Nuclear Medicine

Volume

57

Issue

supplement 2

Pages

1937-1937

Publisher

Society of Nuclear Medicine