The value of MRI in the rapid diagnosis of aortic dissection

GONG Yidong; GONG Hongjiang; LIANG Yunping; TIAN Xiao

Abstract：Objective To evaluate the application value of MR True-FISP and HASTE sequences in the diagnosis of aortic dissection.Methods Cases of thoracic aortic examination using True-FISP,HASTE and CTA were retrospectively analyzed during the same period,and the results of CTA examination were used as the gold standard,and the results of True-FISP and HASTE sequences were compared with them.Statistical analysis was made from three aspects:the scope of dissection(Stanford A and B classification),the display of the location of the ruptures,and the involvement of the main branch arteries(brachioce-phalic trunk artery,left common carotid artery and left subclavian artery).Results A total of 65 cases of aortic dissection were collected.The extent and classification of dissection diagnosed by True-FISP and HASTE sequence were consistent with the re-sults of CTA examination,with 19 cases of type A dissection(including 3 cases of intermural hematoma),and 47 cases of type B dissection(including 11 cases of intermural hematoma).CTA detected 47 ruptures and 31 affected branches.44 ruptures were detected in the True-FISP sequence,6 of which were inconsistent with CTA results,and 30 affected branches were detected,4 of which were not consistent with the results of CTA.33 ruptures were detected in the HAST sequence,3 of which were inconsis-tent with CTA results,and 13 affected branches were detected,two of which were inconsistent with CTA results.True-FISP had a sensitivity of 80.85%and a specificity of 70.10%for the diagnosis of the ruptures,and the sensitivity and specificity of the af-fected branches were 83.87%and 95.94%.HASTE had a sensitivity of 63.83%and a specificity of 82.35%for the diagnosis of the ruptures,and the sensitivity and specificity of the affected branches were 35.48%and 98.36%.Conclusion True-FISP and HASTE sequences can accurately diagnose and classify aortic dissection on the premise of rapid completion of the examination.True-FISP sequences have a higher diagnostic value for rupture demonstration and involvement of major vascular branches,while the diagnostic value of HASTE sequences is slightly lower.The True-FISP sequence has high application value in patients with suspected aortic dissection.