Radiology: How do I identify the rapid growth rate of abdominal aortic aneurysm?

Backgroundabdominal aortic aneurysm (AAAs) combined intracavity thrombosis (ILT) is an indicator of the growth of aneurysmspurposesthis study aims to use CT and MRI to assess the value of ILT in AAA progressmaterials and methodspatients with black blood MRI in AAA and with a line contrast-enhanced CT agent follow-upThe maximum aAA diameter was measured under multi-plane reconstruction to calculate the growth rate of aneurysmThe relationship between demographic characteristics and imaging indicators and the growth of aneurysm was evaluated using single-variable and multivariate linear regression modelsresults22 patients in this studyA total of 207 routine CT follow-up, 18 patients walkMRI follow-upAt baseline, the median aAA has a long diameter of 3.8 cm (IQR, 3.3-4.3 cm); A total of 127/225 cases (54.7%) showed ILTCompared to AAA patients without ILT, the baseline aneurysm with ILT was larger (median, 4.1 cm (IQR, 3.6-4.8 cm) vs 3.4 cm (IQR, 3.2-3.9) P .001), with a faster growth rate (median, 2.0 mm/y (IQR, 1.3-3.2 mm/y) vs 1.0 mm/y (IQR, 0.4-1.8 mm/y); P .001)The small AAA (size range of 3-4 cm) of the combined ILT grows at a faster rate of 1.9 times that of iLT-free (median, 1.5 mm/y s/IQR, 0.9-2.7 mm/y) vs 0.8 mm/y (IQR, 0.3-1.5 mm/y) P .001)The growth rate of the combined ILT's moderate size AAA is 1.2 times the growth rate without ILT (median growth rate, 2.1 mm/y , 1.4, 3.7 mm/y) vs 1.8 mm/y (IQR, 0.9, 2.0 mm/y); PIn multiple analyses, baseline long diameter and ILT are indicators that are independently positively correlated with the growth rate of aneurysms (the standard regression coefficients are 0.43 (P .001) and 0.15 (P .02) respectively) conclusion
the largest cross-sectional long diameter and intracavity thrombosis are independent indicators for predicting the growth of abdominal aortic aneurysm