Optimal Adaptive Statistical Iterative Reconstruction Percentage in Dual-energy Monochromatic CT Portal Venography

Academic Radiology
Liqin ZhaoWen He

Abstract

The aim of this article was to study the influence of different adaptive statistical iterative reconstruction (ASIR) percentages on the image quality of dual-energy computed tomography (DECT) portal venography in portal hypertension patients. DECT scans of 40 patients with cirrhosis (mean age, 56 years) at the portal venous phase were retrospectively analyzed. Monochromatic images at 60 and 70 keV were reconstructed with four ASIR percentages: 0%, 30%, 50%, and 70%. Computed tomography (CT) numbers of the portal veins (PVs), liver parenchyma, and subcutaneous fat tissue in the abdomen were measured. The standard deviation from the region of interest of the liver parenchyma was interpreted as the objective image noise (IN). The contrast-noise ratio (CNR) between PV and liver parenchyma was calculated. The diagnostic acceptability (DA) and sharpness of PV margins were obtained using a 5-point score. The IN, CNR, DA, and sharpness of PV were compared among the eight groups with different keV + ASIR level combinations. The IN, CNR, DA, and sharpness of PV of different keV + ASIR groups were all statistically different (P < 0.05). In the eight groups, the best and worst CNR were obtained in the 60 keV + 70% ASIR and 70 keV + 0% ASIR...Continue Reading

References

Apr 1, 2008·Journal of Medical Imaging and Radiation Oncology·A Agarwal, M Jain
Jun 23, 2009·AJR. American Journal of Roentgenology·Benjamin M YehSven Prevrhal
Feb 24, 2010·Investigative Radiology·Priyanka PrakashDushyant V Sahani
Mar 30, 2011·European Journal of Radiology·Li-qin ZhaoLi Tan
Apr 19, 2011·Acta Radiologica·Marco RengoAndrea Laghi
Apr 21, 2012·Radiology·Sarabjeet SinghJames H Thrall
Nov 1, 2012·AJR. American Journal of Roentgenology·Tobias HeyeDaniel T Boll
Jan 17, 2013·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Hiro KiyosueHiromu Mori
Mar 16, 2013·Journal of Computer Assisted Tomography·Qi WangShijie Wang
Apr 13, 2013·Radiology·Jonathan A ScheskeJonathon A Leipsic

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Citations

Jun 26, 2018·Radiologic Clinics of North America·Bhavik N Patel, Daniele Marin

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