The added benefit of the noncontrast CT when performed in addition to the CTA is that it allows for a more accurate detection of aneurysm calcification and thoracic and iliac lesions compared to US. MRA Abdomen and Pelvis With IV Contrast Similar to the CT, MR angiography (MRA) is also highly accurate in detecting AAA and shows excellent reproducibility in between MRI examinations but has not been accepted as a screening tool [13]. MRA can serve as an alternative tool for CT or US. MRA has the potential to provide further information on AAA beyond its morphology, for example, AAA wall strain and stiffness, which may contribute to better understanding of AAA pathophysiology, biomechanics, and risk for rupture [20]. MRA Abdomen and Pelvis Without and With IV Contrast There is insufficient evidence to support noncontrast MRA as a screening examination for AAA. However, a prospective study of nonenhanced MRA compared with contrast-enhanced CTA demonstrated equivalent accuracy of measurements in preoperative planning for endovascular aortic repair (EVAR) of AAA [21]. Noncontrast MRA sequences such as 3-D noncontrast black-blood cardiovascular MR technique has been studied with compressed sensing to decrease its long scan time [22]. MRA Abdomen and Pelvis Without IV Contrast There is insufficient evidence to support the use of a noncontrast MRA as a screening examination for AAA. MRI Abdomen and Pelvis With IV Contrast There is insufficient evidence to support the use of MRI that lacks MRA sequences as a screening examination for AAA. Screening for Abdominal Aortic Aneurysm MRI Abdomen and Pelvis Without and With IV Contrast There is insufficient evidence to support the addition of a noncontrast MRI as a screening examination for AAA. MRI Abdomen and Pelvis Without IV Contrast There is insufficient evidence to support a noncontrast MRI as a screening examination for AAA.
Screening for Abdominal Aortic Aneurysm. The added benefit of the noncontrast CT when performed in addition to the CTA is that it allows for a more accurate detection of aneurysm calcification and thoracic and iliac lesions compared to US. MRA Abdomen and Pelvis With IV Contrast Similar to the CT, MR angiography (MRA) is also highly accurate in detecting AAA and shows excellent reproducibility in between MRI examinations but has not been accepted as a screening tool [13]. MRA can serve as an alternative tool for CT or US. MRA has the potential to provide further information on AAA beyond its morphology, for example, AAA wall strain and stiffness, which may contribute to better understanding of AAA pathophysiology, biomechanics, and risk for rupture [20]. MRA Abdomen and Pelvis Without and With IV Contrast There is insufficient evidence to support noncontrast MRA as a screening examination for AAA. However, a prospective study of nonenhanced MRA compared with contrast-enhanced CTA demonstrated equivalent accuracy of measurements in preoperative planning for endovascular aortic repair (EVAR) of AAA [21]. Noncontrast MRA sequences such as 3-D noncontrast black-blood cardiovascular MR technique has been studied with compressed sensing to decrease its long scan time [22]. MRA Abdomen and Pelvis Without IV Contrast There is insufficient evidence to support the use of a noncontrast MRA as a screening examination for AAA. MRI Abdomen and Pelvis With IV Contrast There is insufficient evidence to support the use of MRI that lacks MRA sequences as a screening examination for AAA. Screening for Abdominal Aortic Aneurysm MRI Abdomen and Pelvis Without and With IV Contrast There is insufficient evidence to support the addition of a noncontrast MRI as a screening examination for AAA. MRI Abdomen and Pelvis Without IV Contrast There is insufficient evidence to support a noncontrast MRI as a screening examination for AAA.