Optimization of multiplanar reformations from isotropic data sets acquired with 16-detector row helical CT scanner.

Journal Article

Institutional review board approval and waiver of consent were obtained for the patient component of this retrospective HIPAA-compliant study. By using an anthropomorphic phantom and metal oxide semiconductor field effect transistor detectors, radiation dose was determined for one eight-detector row and two 16-detector row computed tomographic (CT) protocols. A custom phantom was scanned by using the three protocols to identify isotropy. Contrast-to-noise ratios (CNRs) were determined for the same protocols by using a third phantom. Seven patients had undergone isotropic 16-detector row CT of the abdomen and pelvis. Anonymized coronal reformations at various thicknesses were ranked qualitatively by three radiologists. Effective dose equivalents were similar for the eight- and 16-detector row protocols. When transverse and coronal reformations of data acquired in the custom phantom were compared, coronal reformations obtained with the 16-detector row and 0.625-mm section thickness protocol were found to be nearly identical to the transverse image for all sets of line pairs. CNRs were consistently highest on 5-mm-thick coronal reformations (CNR range, 1.2-3.3). For qualitative assessment, 2- and 3-mm-thick coronal reformations were consistently preferred.

Full Text

Duke Authors

Cited Authors

  • Jaffe, TA; Nelson, RC; Johnson, GA; Lee, ER; Yoshizumi, TT; Lowry, CR; Bullard, AB; DeLong, DM; Paulson, EK

Published Date

  • January 2006

Published In

Volume / Issue

  • 238 / 1

Start / End Page

  • 292 - 299

PubMed ID

  • 16373774

International Standard Serial Number (ISSN)

  • 0033-8419

Digital Object Identifier (DOI)

  • 10.1148/radiol.2381050404

Language

  • eng

Conference Location

  • United States