Abstract：Objective To investigate the effects of filtered back projection (FBP), hybrid iterative reconstruction (iDose4) and iterative
model reconstruction (IMR) on the quality of gastric vessel imaging after CT enhanced scanning. Methods A total of 21 patients
with gastric cancer were prospectively enrolled. The CT images in arterial phase were reconstructed by FBP, iDose4 and IMR
methods, respectively. The CT values, signal-noise-ratio (SNR) and contrast-noise-ratio (CNR) of perigastric arteries (abdominal
aorta, celiac trunk, common hepatic artery, splenic artery, left gastric artery, superior mesenteric artery, gastroduodenal artery, and
right gastroepiploic artery) were measured. The differences of SNR and CNR in different perigastric arteries using FBP, iDose4 and
IMR methods were compared by paired t-test. Results The SNR ranges of abdominal aorta, celiac trunk, common hepatic artery,
splenic artery, left gastric artery, superior mesenteric artery, gastroduodenal artery, and right gastroepiploic artery using FBP, iDose4
and IMR reconstruction algorithms were 12.201~15.838, 16.696~22.381 and 38.327~46.018, respectively. The CNR ranges were
9.549~13.186, 12.952~18.637 and 38.307~30.616, respectively. The SNR and CNR of the three reconstruction algorithms differed
significantly. The SNR and CNR using IMR method were significantly higher than that of iDose4 and FBP methods (P<0.001).
Conclusion Under the same scanning conditions, the image quality of perigastric arteries using IMR is significantly better than that
of iDose4 and FBP.
胡君花，刘松，施婷婷，胡安宁，李辉. 三种不同重建算法对胃周CT动脉成像质量的影响[J]. 中国医疗设备, 2019, 34(1): 63-65.
HU Junhua, LIU Song, SHI Tingting, HU Anning, LI Hui. Effects of Three Different Reconstruction Algorithms on the Quality
of Gastric Peripheral CT Angiography. China Medical Devices, 2019, 34(1): 63-65.
