Assessent of portal vein based on a novel virtual monoenergetic algorithm in dual-energy CT

doi:10.3969/j.issn.1006-7795.2019.06.023

Abstract

Abstract: Objective To explore the effect of a novel virtual monoenergetic plus imaging (Mono+) reconstruction algorithm on image quality in portal venography by dual energy CT (DECT) imaging. Methods sixty patients who received abdominal DECT were retrospectively included. Mono+ images were reconstructed at 40,50,60,70, 80, 90 and 100 keV levels. Contrast to noise ratio (CNR),signal to noise ratio (SNR),image quality scores of the main stem of portal veins of 40-100 keV Mono+ images were compared to standard linearly blended M_0.5 images (50% 100 kV, 50% 140 kV)with paired t-test. Results Mono+ DECT series showed a statistically superior CNR at 40,50, 60 and 70 keV compared to M_0.5 images for the main stem of portal vein(P<0.05). SNR of Mono+ images was consistently significantly higher at 40, 50, 60,70 and 80 keV compared to M_0.5 for the main stem of portal vein(P<0.05).The image quality score of Mono+ 40-70 keV series for the main stem of portal vein was significantly better than that of M_0.5 group (P<0.05).The CNR and SNR of Mono+ 40 keV series for the main stem of portal vein were 3.57 times and 1.53 times as much as those of M_0.5 images, respectively.Conclusion Mono+ is a very promising algorithm which is able to overcome noise limitations. Compared to linearly blended images(M_0.5) Mono+ reconstructions at 40 keV levels of portal venography in dual energy CT significantly improved quantitative image quality.

Key words: dual energy, portal vein, monoenergetic, angiography, X-ray computed

CLC Number:

R816.2

Hu Bin, Chen Jingjing, Xu Wenjian, Xu Qi, Li Xiaofei. Assessent of portal vein based on a novel virtual monoenergetic algorithm in dual-energy CT[J]. Journal of Capital Medical University, 2019, 40(6): 943-947.

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URL: https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/10.3969/j.issn.1006-7795.2019.06.023

https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/Y2019/V40/I6/943

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