CT images of abdomen and pelvis: Effect of nonlinear three-dimensional optimized reconstruction algorithm on image quality and lesion characteristics

S. M R Rizzo, Mannudeep K. Kalra, Bernhard Schmidt, Rainer Raupach, Michael M. Maher, Michael A. Blake, Sanjay Saini

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to retrospectively assess the effect of a post-processing nonlinear three-dimensional optimized reconstruction algorithm on image quality and lesion characteristics in abdominal and pelvic computed tomographic (CT) images. Institutional review board approved the HIPAA-compliant study protocol; informed consent was waived. Abdominal and pelvic CT images (40 patients; male-female ratio, 20:20; age range, 28-86 years) at 5-mm (n = 20) and 2-mm (n = 20) section thicknesses were post-processed with the algorithm at three noise reduction levels. Image noise at the level of porta hepatis and acetabulum was evaluated with a five-point scale (1, no or minimal noise; 5, unacceptable noise), and presence and number of lesions and conspicuity were assessed. Statistical analysis was performed (Wilcoxon signed rank test, analysis of variance). Significant noise reduction was noted at all three levels with the algorithm (P <.05). Reduction in image contrast was noted with only one noise reduction level (P <.0001). The algorithm improves image noise without affecting lesion conspicuity and detection on low-dose abdominal and pelvic CT images.

Original languageEnglish
Pages (from-to)309-315
Number of pages7
JournalRadiology
Volume237
Issue number1
DOIs
Publication statusPublished - Oct 2005

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

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