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[Biphasic liver diagnosis with multiplanar-detector spiral CT]
Der Radiologe
|December 22, 1999
Summary
Multi-row-detector helical CT (MS-CT) improves detection and characterization of liver lesions with faster scan times compared to single-row-detector spiral CT (SS-CT). Optimized MS-CT protocols enhance diagnostic accuracy for focal liver lesions.
Area of Science:
- Radiology
- Medical Imaging Technology
Background:
- Focal liver lesions require accurate imaging for diagnosis and characterization.
- Single-row-detector spiral CT (SS-CT) has limitations in speed and resolution for liver imaging.
Purpose of the Study:
- To optimize scan protocols for multi-row-detector helical CT (MS-CT).
- To evaluate the diagnostic value of MS-CT compared to SS-CT for focal liver lesions.
Main Methods:
- Phantom studies evaluated MS-CT detection of low-contrast objects with varying parameters.
- Intraindividual comparison of MS-CT (3.75, 5, 7.5 mm slices) and SS-CT in 20 patients with 43 liver lesions.
Main Results:
- MS-CT achieved equivalent detection rates as SS-CT with three times faster scanning.
- Slice thicknesses of 3.75 and 5 mm were optimal for MS-CT detection and characterization.
- MS-CT enabled clear separation of arterial and portal venous phases.
Conclusions:
- MS-CT provides reliable imaging of the liver parenchyma in defined perfusion phases.
- Optimized MS-CT protocols enhance detection and characterization of focal liver lesions.
- MS-CT offers significantly faster scan times than SS-CT.