Dual-source computed tomographic angiography using triple-rule-out protocols in combination with abdominal computed tomographic angiography for evaluation of aortic dissection

Abstract

To explore the clinical value of "triple-rule-out" protocols using dual-source computed tomography for aortic dissection (AD) assessment. Totally 25 patients suspecting of suffering from AD were examined on a dual-source computed tomography scanner. Two-dimensional and three-dimensional reconstruction was performed in all patients by means of multiplanar reconstruction, curved planar reformation, maximum intensity projection, and volume rendering. All images were read by two experienced radiologists in consensus. All patients were divided into AD group (n=12) and NO AD group (n=13) , The average Hounsfield unit values of true and false lumen were compared between superior of the aortic around the first endoleak and inferior of the aortic around renal artery. In AD group, there were 6 patients with DeBakey type 1, 2 patients with DeBakey type 2, and 4 patients with DeBakey type 3. The image quality was rated on a 3-point scale as excellent in 10 patients (83.3%) and good in 2 patients (16.7%) . All cases was fully evaluable in NO AD group. The average Hounsfield unit values of true lumen between superior of the aortic around the first endoleak and inferior of the aortic around renal artery showed no significant difference between AD and NO AD group. Dual-source computed tomography offers a non-invasive, accurate, and rapid way to evaluate AD.