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[Hepatic x-ray computed tomography. Value of delayed (6 hours) scanning in patients with normal biliary function]
J N Bruneton1, A Rogopoulos, D Merran
1Service de Radiodiagnostic, Centre Antoine-Lacassagne, Nice.
Journal De Radiologie
|April 1, 1990
Summary
Delayed hepatic CT (DH-CT) enhances liver metastasis detection. Post-contrast scans, including DH-CT, are superior to pre-contrast scans for diagnosing liver metastases.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Delayed hepatic CT (DH-CT) is an imaging technique.
- Liver metastases are a common oncological challenge.
Purpose of the Study:
- To evaluate the efficacy of DH-CT in diagnosing liver metastases.
- To compare the diagnostic performance of scans taken at different time points post-injection.
Main Methods:
- A study involving 250 patients without significant bile duct pathology.
- Administration of 76 grams of iodine contrast agent.
- Comparison of CT scans taken before, immediately after, and 6 hours post-injection.
Main Results:
- Post-injection scans, particularly DH-CT, showed superiority for liver metastasis diagnosis.
- Contrast enhancement in normal liver varied based on iodine dosage.
- Focal steatosis uniquely benefits from DH-CT due to consistent density differences.
Conclusions:
- DH-CT optimizes the workup of liver metastases.
- Conventional CT is still indicated for isolated tumors.
- DH-CT improves diagnostic accuracy for liver metastases compared to conventional CT alone.