Abstract
Background
A survey of the Society of Computed Body Tomography/Magnetic Resonance (SCBT/MR) was performed to assess current techniques in liver CT scanning.
Methods
The study was designed as an update to a study performed in 1987. The survey was distributed to 67 members of the SCBT/MR at 35 institutions.
Results
Twenty-six institutions responded. As in 1987, none relied solely on noncontrast scans. In 1987, only 54% (12/22) of institutions performed contrast-enhanced scans as their primary technique compared with 73% (19/26) in 1993. Ionic contrast was used exclusively in the earlier study, whereas in the present study 58% used nonionic contrast in the majority of cases and 38% used nonionic contrast routinely. In 1987, 41% performed scans with a power injector compared with 85% in the present study. Enhanced scans were performed during the contrast bolus in 36% of institutions in 1987 compared with 76% in this study. No institution relied on noncontrast scans alone. In the previous study the delay between injection and scanning was variable (0–60 s), whereas in the present study 83% specified a delay of 21–45s.
Conclusion
Significant refinements in CT technique, wider use of power injectors, utilization of nonionic contrast, and a more critical approach to optimize liver imaging have created a significant impact on the practice of liver CT.
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Dr. Silverman is supported in part by a Senior Research and Development Award from General Electric Medical Systems. Additional grant support provided by NY COMED Inc., Mallinckrodt Medical and Medrad Inc.
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Silverman, P.M., Cooper, C. & Zeman, R.K. Imaging of the liver: a survey update of prevailing techniques for conventional CT scanning. Abdom Imaging 20, 348–352 (1995). https://doi.org/10.1007/BF00203369
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DOI: https://doi.org/10.1007/BF00203369