320-detector CT angiography in diagnosis of aortic dissection

Objective To explore the value of 320-detector CT angiography(CTA) in diagnosis of aortic dissection(AD).Methods A total of 59 consecutive patients with suspected AD were enrolled.The results of 320-detector CTA with 16-detector CTA,MRA and DSA were compared.Results Totally 43 patients were diagnosed with 3 methods as AD,4 with thoracic aorta aneurysm,9 with abdominal aorta aneurysm and 3 with false abdominal aorta aneurysm.The diagnostic accuracy rate for preoperative revealing of the tears of 320-detector CTA(75/77,97.40%) was higher than that of 16-detector CTA(47/53,88.68%,χ2=4.14,P0.05) and MRA(40/46,86.96%,χ2=5.17,P0.05).The dose of radiation in examination of 320-detector CTA([849.62±44.73]mGy) was lower than that of 16-detector CTA([927.11±39.47]mGy,t=2.84,P0.05) and DSA([976.85±54.21]mGy,t=2.51,P0.05).In addition,320-detector CTA was able to display the intimal flap,the real and false lumen,the thrombus in false lumen and detail of significant branches of aorta.Conclusion 320-detector CTA is secure,quick,effective and noinvasive in diagnosing AD,thus has important clinical value in drawing up the treatment plan of AD.