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[Late phase contrast enhanced-CT analysis of thrombosed type aortic dissection]
H Hayashi1, H Kawamata, R Takagi
1Department of Radiology, Nippon Medical School.
Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|October 1, 1995
Summary
Contrast-enhanced CT scans reveal late enhancement in thrombosed false lumens of aortic dissection. This finding may indicate an unstable status of the dissected aorta before tissue organization.
Area of Science:
- Radiology
- Cardiovascular Imaging
- Aortic Diseases
Background:
- Thrombosed type aortic dissection presents diagnostic challenges.
- Contrast-enhanced computed tomography (CE-CT) is crucial for evaluating aortic dissection.
- Understanding false lumen enhancement patterns is key to assessing disease stability.
Purpose of the Study:
- To analyze the enhancement patterns of thrombosed false lumens in aortic dissection using early- and late-phase CE-CT.
- To investigate the potential of late-phase enhancement to indicate false lumen status.
Main Methods:
- Seven patients with thrombosed aortic dissection underwent early- and late-phase CE-CT.
- Image acquisition included early-phase (30 seconds) and late-phase (6 minutes) scans.
- Analysis focused on enhancement within the thrombosed false lumens.
Main Results:
- No early-phase enhancement was observed in thrombosed false lumens.
- Five of seven patients showed late-phase enhancement in the descending aorta false lumens.
- Two enhancement patterns were identified: sub-adventitial crescentic enhancement and vague enhancement around ulcerlike projections.
Conclusions:
- Late-phase CE-CT can reveal enhancement in thrombosed false lumens of aortic dissection.
- Observed late enhancement patterns may suggest an unstable state of the false lumen.
- Further research is needed to establish the clinical significance of late enhancement in predicting disease progression.