TY - JOUR
T1 - IQ·SPECT technology and its clinical applications using multicenter normal databases
AU - Nakajima, Kenichi
AU - Okuda, Koichi
AU - Momose, Mitsuru
AU - Matsuo, Shinro
AU - Kondo, Chisato
AU - Sarai, Masayoshi
AU - Shibutani, Takayuki
AU - Onoguchi, Masahisa
AU - Shimizu, Takeshi
AU - Vija, A. Hans
N1 - Funding Information:
Acknowledgements The authors appreciate Yoriko Horiguchi, MD, Department of Cardiology, National Hospital Organization, Sagami-hara National Hospital, Sagamihara, Japan for collection of normal databases. This work was partly supported by the Japanese Society of Nuclear Medicine working group activity (2013–2015) and JSPS Grants-in-Aid for Scientific Research (C) in Japan (PI: K. Nakajima, No. 15K09947). The authors appreciate the editorial assistance of Ronald Belisle.
Publisher Copyright:
© 2017, The Author(s).
PY - 2017/11/1
Y1 - 2017/11/1
N2 - 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.
AB - 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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U2 - 10.1007/s12149-017-1210-3
DO - 10.1007/s12149-017-1210-3
M3 - Review article
C2 - 28940141
AN - SCOPUS:85029766858
VL - 31
SP - 649
EP - 659
JO - Annals of Nuclear Medicine
JF - Annals of Nuclear Medicine
SN - 0914-7187
IS - 9
ER -