Comparing five different iterative reconstruction algorithms for ... - UiO
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Comparing five different iterative reconstruction algorithms for ... - UiO
Jul 1, 2014 - Comparing five different iterative reconstruction algorithms for computed tomography in an ROC study. Kristin Jensen & Anne Catrine T.
Eur Radiol DOI 10.1007/s00330-014-3333-4
COMPUTED TOMOGRAPHY
Comparing five different iterative reconstruction algorithms for computed tomography in an ROC study Kristin Jensen & Anne Catrine T. Martinsen & Anders Tingberg & Trond Mogens Aaløkken & Erik Fosse
Received: 15 January 2014 / Revised: 1 July 2014 / Accepted: 8 July 2014 # European Society of Radiology 2014
Abstract Objectives The purpose of this study was to evaluate lesion conspicuity achieved with five different iterative reconstruction techniques from four CT vendors at three different dose levels. Comparisons were made of iterative algorithm and filtered back projection (FBP) among and within systems. Methods An anthropomorphic liver phantom was examined with four CT systems, each from a different vendor. CTDIvol levels of 5 mGy, 10 mGy and 15 mGy were chosen. Images were reconstructed with FBP and the iterative algorithm on the system. Images were interpreted independently by four observers, and the areas under the ROC curve (AUCs) were calculated. Noise and contrast-to-noise ratios (CNR) were measured. Results One iterative algorithm increased AUC (0.79, 0.95, and 0.97) compared to FBP (0.70, 0.86, and 0.93) at all dose levels (p
