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Updated: Jun 28, 2025

Quantitative Micro-CT Analysis of Aortopathy in a Mouse Model of β-aminopropionitrile-induced Aortic Aneurysm and Dissection

Quantitative Micro-CT Analysis of Aortopathy in a Mouse Model of β-aminopropionitrile-induced Aortic Aneurysm and Dissection

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Postmortem contrast-enhanced computed tomography via direct large-vessel puncture.

Shogo Shimbashi¹, Akiko Takeuchi², Motoo Yoshimiya¹

¹University of Fukui School of Medical Sciences, Department of Forensic Medicine, Japan.

Legal Medicine (Tokyo, Japan)

|April 19, 2024

Summary

Postmortem contrast-enhanced CT (PMeCT) via direct large-vessel puncture is useful for identifying vascular lesions. This technique successfully diagnosed conditions like aortic dissection and aneurysm rupture in all cases.

Keywords:

Angiography Cardiac tamponade Contrast enhancement Hemorrhage Postmortem CT

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Last Updated: Jun 28, 2025

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Retrograde Perfusion and Filling of Mouse Coronary Vasculature as Preparation for Micro Computed Tomography Imaging

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Published on: February 10, 2012

Area of Science:

Forensic Radiology
Vascular Imaging
Postmortem Imaging

Background:

Routine postmortem CT may suggest vascular lesions but often lacks definitive detail.
Identifying the precise source of vascular injury is crucial for determining cause of death.
Postmortem imaging techniques require refinement for enhanced diagnostic accuracy.

Purpose of the Study:

To evaluate the utility of postmortem contrast-enhanced CT (PMeCT) using direct large-vessel puncture.
To assess PMeCT's effectiveness when initial postmortem CT indicates a vascular cause of death.
To determine if PMeCT can accurately visualize and identify specific vascular pathologies.

Main Methods:

PMeCT was performed in 9 cases following initial CT findings suggestive of vascular lesions.
Target vessels were identified using CT data and a surface grid; an 18-G spinal needle was used for puncture.
Contrast medium was injected incrementally with CT scans at each stage to monitor distribution and confirm no extravasation.

Main Results:

PMeCT was successful in all 9 cases, with no procedure-related extravasation.
Diagnoses included cardiac tamponade (n=7, including ascending aortic dissection and cardiac rupture), thoracic aortic aneurysm rupture (n=1), and iliac artery aneurysm rupture (n=1).
The technique effectively visualized the extent and source of bleeding in vascular pathologies.

Conclusions:

Postmortem contrast-enhanced CT via direct large-vessel puncture is a highly effective method for diagnosing vascular lesions.
PMeCT provides definitive identification of bleeding sources when pericardial hematoma or cavity bleeding is suspected.
This minimally invasive technique enhances the diagnostic capabilities of postmortem imaging for vascular deaths.