Print page Print page
Switch language
The Capital Region of Denmark - a part of Copenhagen University Hospital

CT and 3D-ultrasound registration for spatial comparison of post-EVAR abdominal aortic aneurysm measurements: A cross-sectional study

Research output: Contribution to journalJournal articleResearchpeer-review

  1. Full-Volume Assessment of Abdominal Aortic Aneurysms by 3-D Ultrasound and Magnetic Tracking

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Cutdown Technique is Superior to Fascial Closure for Femoral Artery Access after Elective Endovascular Aortic Repair

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Contrast Enhanced Three Dimensional Ultrasound for Intraluminal Thrombus Assessment in Abdominal Aortic Aneurysms

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Contrast-Enhanced Ultrasound in Vascular Surgery: Review and Update

    Research output: Contribution to journalReviewResearchpeer-review

  • L Rouet
  • Cécile Dufour
  • Antoine Collet Billon
  • K Bredahl
View graph of relations

OBJECTIVE: The aim of the present study is to provide a methodology to register volumes of stented abdominal aortic aneurysm, imaged by 3D-US and CT modalities. After registration, the method enables to compare the spatial location of measurements and AAA size in a common coordinate system.

METHODS: The study is cross-sectional and compares volumes acquired within a few days, in order to eliminate changes due to the evolution of AAA shape after treatment. The key element is to rely on stent alignment to register the CT and 3D-US volumes, providing access to a patient-specific common spatial coordinate system. In parallel, 3D segmentations are performed and used to extract multi-planar reconstructions at the locations of maximum diameter in each modality. The positions of the planes extracted in each modality, and the AAA diameters are finally compared in the common coordinate system.

RESULTS: Results are validated on a database of 52 patients. After registrations, results show a mean inter-planar distance of 6.4 ± 4.5 mm and a mean inter-planar angle of 10.2°±6.7 between CT and 3D-US multi-planar reconstructions. Bland-Altman comparisons of diameter measurements in the CT, US and non-registered volumes are respectively 5.1 ± 2.8, 3.9 ± 2.8, 4.6 ± 3.0 mm.

CONCLUSION: The proposed approach provides both visual and quantitative validations of measurements extracted from multi-modality images of the same pathology, in terms of spatial relationship and diameters.

SIGNIFICANCE: The present work provides additional confidence in the use of 3D-US without CT for the follow-up of patients with abdominal aortic aneurysms after endovascular treatment.

Original languageEnglish
JournalComputerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society
Pages (from-to)49-59
Number of pages11
Publication statusPublished - Apr 2019

ID: 59374613