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

被引：32

作者：

Jaffe, TA ^{[1
]}

Nelson, RC ^{[1
]}

Johnson, GA ^{[1
]}

Lee, ER ^{[1
]}

Yoshizumi, TT ^{[1
]}

Lowry, CR ^{[1
]}

Bullard, AB ^{[1
]}

DeLong, DM ^{[1
]}

Paulson, EK ^{[1
]}

机构：

[1] Duke Univ, Med Ctr, Dept Radiol, Durham, NC 27710 USA

来源：

RADIOLOGY | 2006年 / 238卷 / 01期

关键词：

D O I：

10.1148/radiol.2381050404

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];

摘要：

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. (c) RSNA, 2006.

引用

页码：292 / 299

页数：8

共 22 条

[1]

Isotropic half-millimeter angiography of coronary artery bypass grafts with 16-slice computed tomography [J].