The Diagnosis Value of Three Dimensional Contast-enhanced Magnetic Resonance Angiography in Carotial Stenosis

Objective To assess the diagnosis value of three dimensional contrast-enhanced magnetic resonance angiography(3D CE-MRA) in carotid stenosis.Methods Thirty-two patients with carodid stenosis underwent 3D CE-MRA and digital substraction angiography(DSA)contemporaneously,and measure the diameter of stenosis in carotid,and evaluated the result between two methods.Results In this group 39 carotid stenosises were found by 3D CE-MRA image,among them 37 stenosises were diagnosed with both examinations,two stenosises were highly suspected as no carotid stenosis underwent 3D CE-MRA.The sensitivity of 3D CE-MRA was 100%,the specificity 97.8%～99%,and the acaucacy 97.9%～98.5%(K=0.928～1) in 3D Craniocervical artery.As in carvernous portion of internal carotid artery the sensistirity was 100%,the specficity 92.5%,and the accuracy 93.5%(K=0.657).Conclusion 3D CE-MRA have dsmonstrated the stenosis of craniocervical arteries with reliability and can take place of DSA.