Screening for Abdominal Aortic Aneurysm: Measurement Technique and Thresholds
Regulatory Framework
The performance of screening and diagnostic ultrasound of the abdominal aorta in adults is regulated by two documents: AIUM Practice Parameter for the Performance of Diagnostic and Screening Ultrasound of the Abdominal Aorta in Adults (2025 revision, publication 2026) and ACR–AIUM–SRU Practice Parameter for the Performance of Diagnostic and Screening Ultrasound of the Abdominal Aorta in Adults (2025).
Technique for Measuring Maximum Diameter
According to Borgbjerg et al. (Eur J Vasc Endovasc Surg 2018; 55:206–213), which both practical parameters reference, the most reproducible methods for ultrasound assessment of the maximum diameter of the abdominal aorta are:
| Measurement Method | Characteristic |
|---|---|
| Leading edge to leading edge | Method with the best reproducibility |
| Inner to inner edge | Method with the best reproducibility |
The choice of a reproducible measurement method is crucial for the correct dynamic assessment of aortic size and comparability of results between studies.
Reporting Standards
The standards for reporting on arterial aneurysms are outlined in the document by Johnston KW, Rutherford RB, Tilson MD et al. 'Suggested standards for reporting on arterial aneurysms' (Subcommittee on Reporting Standards for Arterial Aneurysms, Society for Vascular Surgery / International Society for Cardiovascular Surgery, J Vasc Surg 1991; 13:452–458).
Diameter Threshold Values
Specific numerical thresholds for the diagnosis of abdominal aortic aneurysm are not provided in the given source excerpts [clarification needed]. To determine them, one should refer to the full text of the relevant AIUM and ACR–AIUM–SRU practice parameters.
Frequently asked questions
Which method for measuring aortic diameter is the most reproducible?
According to Borgbjerg et al. (2018), the most reproducible methods are 'leading edge to leading edge' and 'inner to inner edge'.
Which documents regulate abdominal aorta screening?
The AIUM practice parameters (2025 revision) and the joint ACR–AIUM–SRU parameter (2025) for diagnostic and screening ultrasound of the abdominal aorta in adults.
Where are the reporting standards for aneurysms outlined?
In the document by Johnston KW et al. (J Vasc Surg 1991; 13:452–458) from the Society for Vascular Surgery and International Society for Cardiovascular Surgery.
What specific diameter threshold is considered an aneurysm?
Numerical thresholds are not specified in the provided source excerpts [clarification needed] — reference to the full text of the practice parameters is required.