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Annals of Nuclear Medicine
Published in: Annals of Nuclear Medicine 9/2017

Open Access 01-11-2017 | Review Article

IQ·SPECT technology and its clinical applications using multicenter normal databases

Authors: Kenichi Nakajima, Koichi Okuda, Mitsuru Momose, Shinro Matsuo, Chisato Kondo, Masayoshi Sarai, Takayuki Shibutani, Masahisa Onoguchi, Takeshi Shimizu, A. Hans Vija

Published in: Annals of Nuclear Medicine | Issue 9/2017

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Abstract

IQ·SPECT (Siemens Medical Solutions) is a solution for high-sensitivity and short-time acquisition imaging of the heart for a variable angle general purpose gamma camera. It consists of a multi-focal collimator, a cardio-centric orbit and advanced iterative reconstruction, modeling the image formation physics accurately. The multi-focal collimator enables distance-dependent enlargement of the center region while avoiding truncation at the edges. With the specified configuration and a cardio-centric orbit it can obtain a fourfold sensitivity increase for the heart at the center of the scan orbit. Since IQ·SPECT shows characteristic distribution patterns in the myocardium, appropriate acquisition and processing conditions are required, and normal databases are convenient for quantification of both normal and abnormal perfusion images. The use of prone imaging can be a good option when X-ray computed tomography (CT) is not available for attenuation correction. CT-based attenuation correction changes count distribution significantly in the inferior wall and around the apex, hence image interpretation training and additional use of normal databases are recommended. Recent reports regarding its technology, Japanese Society of Nuclear Medicine working group activities, and clinical studies using 201Tl and 99mTc-perfusion tracers in Japan are summarized.
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Metadata
Title
IQ·SPECT technology and its clinical applications using multicenter normal databases
Authors
Kenichi Nakajima
Koichi Okuda
Mitsuru Momose
Shinro Matsuo
Chisato Kondo
Masayoshi Sarai
Takayuki Shibutani
Masahisa Onoguchi
Takeshi Shimizu
A. Hans Vija
Publication date
01-11-2017
Publisher
Springer Japan
Published in
Annals of Nuclear Medicine / Issue 9/2017
Print ISSN: 0914-7187
Electronic ISSN: 1864-6433
DOI
https://doi.org/10.1007/s12149-017-1210-3

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