Development of respiratory gated myocardial SPECT system
Development of respiratory gated myocardial SPECT system
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DOI：
10.1016/s1071-3581(99)90061-2
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发表时间：
1999-01-01
影响因子：
2.4
通讯作者：
Kumazaki, T
中科院分区：
文献类型：
--
作者：
Cho, K;Kumiata, S;Kumazaki, T
Background. The superposition of the diaphragm and abdominal structures on the inferior wall of the left ventricle has often distorted single photon emission computed tomography (SPECT). We developed a respiratory gated SPECT (RGS) system to diminish artifacts caused by overlap between the inferior wall and upper abdomen and have validated its feasibility for clinical use.Methods and Results. A 2-detector SPECT system equipped with a respiratory monitor based on impedance plethysmography and an original triggering apparatus Has used for RGS in 7 healthy male volunteers. A pulse triggered 100 ms after every expiratory peak was processed in a SPECT system as well as an electrocardiogram (ECG) gating pulse. Inspiratory and expiratory, frames were determined using the respiratory curve derived from fluctuation of the gall bladder uptake. Both sets of images were reoriented into short-asis and vertical long-axis slices. For quantification, data were reconstructed into polar plots and count density estimated in 9 myocardial segments. The mean percentage uptake of inferior segments at inspiration was significantly greater than that at expiration (81 +/- 8.3 versus 76 +/- 7.1; P
