Optimization of reconstruction and quantification of motion-corrected coronary PET-CT.

Optimization of reconstruction and quantification of motion-corrected coronary PET-CT.
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DOI:
10.1007/s12350-018-1317-5
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发表时间:
2020-04
期刊:
Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology
影响因子:
--
通讯作者:
Slomka PJ
Slomka PJ
中科院分区:
其他
文献类型:
--
作者:
Doris MK;Otaki Y;Krishnan SK;Kwiecinski J;Rubeaux M;Alessio A;Pan T;Cadet S;Dey D;Dweck MR;Newby DE;Berman DS;Slomka PJ

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Coronary PET shows promise in the detection of high-risk atherosclerosis, but there remains a need to optimize imaging and reconstruction techniques. We investigated the impact of reconstruction parameters and cardiac motion-correction in 18F Sodium Fluoride (18F-NaF) PET. Twenty-two patients underwent 18F-NaF PET within 22 days of an acute coronary syndrome. Optimal reconstruction parameters were determined in a subgroup of 6 patients. Motion-correction was performed on ECG-gated data of all patients with optimal reconstruction. Tracer uptake was quantified in culprit and reference lesions by computing signal-to-noise ratio (SNR) in diastolic, summed and motion-corrected images. Reconstruction using 24 subsets, 4 iterations, point-spread-function modelling, time of flight and 5-mm post-filtering provided the highest median SNR (31.5) compared to 4 iterations 0-mm (22.5), 8 iterations 0-mm (21.1) and 8 iterations 5-mm (25.6; all p<0.05). Motion-correction improved SNR of culprit lesions (n=33) (24.5[19.9–31.5]) compared to diastolic (15.7[12.4–18.1]; p<0.001) and summed data (22.1[18.9–29.2]; p<0.001). Motion-correction increased the SNR difference between culprit and reference lesions (10.9[6.3–12.6]) compared to diastolic (6.2[3.6–10.3]; p=0.001) and summed data (7.1 [4.8–11.6]; p=0.001). The number of iterations and extent of post-filtering has marked effects on coronary 18F-NaF PET quantification. Cardiac motion-correction improves discrimination between culprit and reference lesions.
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