ACR Appropriateness Criteria ((R)) Abdominal Aortic Aneurysm Follow-up (Without Repair)

UMMS Affiliation

Department of Radiology

Publication Date


Document Type



Cardiovascular Diseases | Health Services Administration | Health Services Research | Radiology | Therapeutics


Abdominal aortic aneurysm (AAA) is defined as aneurysmal dilation of the abdominal aorta to 3 cm or greater. A high degree of morbidity and mortality is associated with AAA rupture, and imaging surveillance plays an essential role in mitigating the risk of rupture. Aneurysm size and growth rate are factors associated with the risk of rupture, thus surveillance imaging studies must be accurate and reproducible to characterize aneurysm size. Ultrasound, CT angiography, and MR angiography provide an accurate and reproducible assessment of size, while radiographs and aortography provide limited evaluation. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision include an extensive analysis of current medical literature from peer reviewed journals and the application of well-established methodologies (RAND/UCLA Appropriateness Method and Grading of Recommendations Assessment, Development, and Evaluation or GRADE) to rate the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where evidence is lacking or equivocal, expert opinion may supplement the available evidence to recommend imaging or treatment.


AUC, Abdominal aortic aneurysm, Abdominal prevention and control, Aortic aneurysm, Aortic rupture, Appropriate Use Criteria, Appropriateness Criteria, CT angiography, MR angiography, Ultrasound

DOI of Published Version



J Am Coll Radiol. 2019 May;16(5S):S2-S6. doi: 10.1016/j.jacr.2019.02.005. Link to article on publisher's site

Journal/Book/Conference Title

Journal of the American College of Radiology : JACR

Related Resources

Link to Article in PubMed

PubMed ID