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Related Experiment Video

Updated: Jun 13, 2026

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

Time-Resolved, Dynamic Computed Tomography Angiography for Characterization of Aortic Endoleaks and Treatment Guidance via 2D-3D Fusion-Imaging

Published on: December 9, 2021

Time-resolved computed tomography imaging of the aorta: a feasibility study.

Wieland H Sommer¹, Dirk A Clevert, Fabian Bamberg

¹Department of Clinical Radiology, University Hospitals-Grosshadern, Ludwig-Maximilians University, Munich, Germany. wieland.sommer@med.uni-muenchen.de

Journal of Thoracic Imaging

|May 14, 2010

Summary

Time-resolved computed tomography angiography (TR-CTA) is a feasible imaging technique for aortic conditions. This low-dose method provides clear angiographic detail comparable to standard protocols, offering potential additional diagnostic value.

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Ultrasound Imaging of the Thoracic and Abdominal Aorta in Mice to Determine Aneurysm Dimensions

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Ultrasound Imaging of the Thoracic and Abdominal Aorta in Mice to Determine Aneurysm Dimensions

Ultrasound Imaging of the Thoracic and Abdominal Aorta in Mice to Determine Aneurysm Dimensions

Published on: March 8, 2019

Area of Science:

Radiology
Medical Imaging
Cardiovascular Imaging

Background:

Standard computed tomography angiography (CTA) is used for follow-up of endovascular aneurysm repair (EVAR) and aortic dissection.
There is a need for advanced imaging techniques that can provide dynamic information with comparable or reduced radiation exposure.

Purpose of the Study:

To evaluate the feasibility of time-resolved computed tomography angiography (TR-CTA) using multiple low-dose phases for aortic imaging.
To assess the additional diagnostic value of TR-CTA compared to standard CTA protocols.

Main Methods:

Twenty-two patients underwent TR-CTA of the aorta with a novel protocol involving 12 low-dose phases and bidirectional table movement.
TR-CTA parameters included 80 kVp, 120 mAs/rot, a 27 cm scan range, and 60 mL of contrast agent.
Radiation dose and image quality were compared with standard biphasic or triphasic CTA protocols used previously.

Main Results:

Mean effective radiation dose for TR-CTA (15.3 mSv) was comparable to biphasic standard CTA (16.2 mSv) but lower than triphasic protocols (23.7 mSv).
Image quality was generally good, with 91% of examinations being fully evaluable; only 9% had limited evaluability due to image noise.
Hounsfield unit values, indicating contrast opacification, were not significantly different between TR-CTA and standard CTA.

Conclusions:

Time-resolved computed tomography angiography (TR-CTA) is a feasible and effective imaging method for follow-up of EVAR and aortic dissection.
TR-CTA provides clear angiographic information with a radiation dose comparable to standard biphasic CTA.
The dynamic imaging capability of TR-CTA may offer additional diagnostic insights beyond conventional CTA.