Multi–Detector Row CT: Principles and Practice for Abdominal Applications
- 1 November 2004
- journal article
- Published by Radiological Society of North America (RSNA) in Radiology
- Vol. 233 (2), 323-327
- https://doi.org/10.1148/radiol.2332030994
Abstract
Abdominal imaging with multi-detector row computed tomography (CT) can be performed during short breath holds. On 16-channel multi-detector row CT scanners, the effective detector row thickness, depending on the manufacturer, is typically 1.0-1.5 mm, which results in a beam collimation of 16-24 mm. At a gantry rotation speed of 0.5 second and a pitch of 1, the table travel speed will be 32-48 mm/sec. At a smaller effective detector row thickness and a narrower beam collimation, a slightly higher pitch may be needed to obtain short-breath-hold CT scans. Typically, transverse scans are viewed at a reconstructed section thickness of 3-5 mm, with thinner sections used for CT angiography and whenever off-axial reformations are obtained. The radiologic technique should be optimized according to the transverse section thickness used for interpretation, and the contrast material administration protocol should be optimized according to the clinical problem, with the scanning triggered for enhancement of a target organ.Keywords
This publication has 15 references indexed in Scilit:
- Comparison of Z-Axis Automatic Tube Current Modulation Technique with Fixed Tube Current CT Scanning of Abdomen and PelvisRadiology, 2004
- Multi–Detector Row CT: Radiation Dose CharacteristicsRadiology, 2003
- AAPM/RSNA Physics Tutorial for Residents: Topics in CTRadioGraphics, 2002
- Using Multidetector CT for Preoperative Vascular Evaluation of Liver Neoplasms: Technique and ResultsAmerican Journal of Roentgenology, 2002
- Are Gadolinium-based Contrast Media Really Safer than Iodinated Media for Digital Subtraction Angiography in Patients with Azotemia?Radiology, 2002
- Multidetector helical CT of the liver for tumor detection and characterizationEuropean Radiology, 2001
- Common Terminology for Single and Multislice Helical CTAmerican Journal of Roentgenology, 2001
- Technique Factors and Image Quality as Functions of Patient Weight at Abdominal CTRadiology, 2000
- Subsecond multi-slice computed tomography: basics and applicationsEuropean Journal of Radiology, 1999
- Multi‐slice helical CT: Scan and reconstructionMedical Physics, 1999