Adaptive statistical iterative reconstruction technique for pulmonary CT: image quality of the cadaveric lung on standard- and reduced-dose CT

Academic Radiology
Masahiro YanagawaNoriyuki Tomiyama

Abstract

To evaluate thin-section computed tomography (CT) images of the lung reconstructed using adaptive statistical iterative reconstruction (ASIR) on standard- and reduced-dose CT. Eleven cadaveric lungs were scanned by multidetector-row CT with two different tube currents (standard dose, 400 mA; reduced dose, 10 mA). The degree of ASIR was classified into six different levels: 0% (non-ASIR), 20%, 40%, 60%, 80%, and 100% (maximum-ASIR). The ASIR (20%, 60%, and 100%) images were compared with the ASIR (0%) images and assessed visually by three independent observers for image quality using a 7-point scale. The evaluation items included abnormal CT findings, normal lung structures, and subjective visual noise. The median scores assigned by the three observers were analyzed statistically. Quantitative noise was calculated by measuring the standard deviation in a circular region of interest on each selected image of ASIR (0%-100%). On standard-dose CT, the overall image quality significantly improved with increasing degree of ASIR (P ≤ .009, Wilcoxon signed-ranks test with Bonferroni correction). As ASIR increased, however, intralobular reticular opacities and peripheral vessels tended to be obscure. On reduced-dose CT, the overall image...Continue Reading

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Citations

Jun 16, 2012·European Radiology·Stephan BaumuellerHatem Alkadhi
Jan 15, 2013·European Radiology·Martin J WilleminkArnold M R Schilham
Aug 24, 2012·AJR. American Journal of Roentgenology·Mizuho NishioKazuro Sugimura
Aug 13, 2011·AJNR. American Journal of Neuroradiology·K KilicB Coskun
Apr 16, 2018·Journal of Medical Imaging and Radiation Oncology·Fiachra MoloneyOwen J O'Connor
May 10, 2016·World Journal of Radiology·Helena FerrisMichael Maher
Sep 12, 2015·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Hyun Jung YoonKyung Soo Lee
Jul 23, 2015·Journal of Magnetic Resonance Imaging : JMRI·Eric A HoffmanUNKNOWN IWPFI Investigators
May 20, 2014·Journal of Computer Assisted Tomography·Ranish Deedar Ali KhawajaMannudeep K Kalra
Dec 22, 2011·The International Journal of Cardiovascular Imaging·Eun-Ah ParkJae Hyung Park
Nov 26, 2013·Journal of Computer Assisted Tomography·Sofia D KordolaimiEfstathios P Efstathopoulos

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