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Efficiency of Ultrasonography and CT Angiography in Follow-up Studies of Carotid Stent and Percutaneous Transluminal Angioplasty

Other Titles
 경동맥스텐트 삽입 후 추적검사로서의 초음파와 CT 혈관조영술의 유용성 
 Chang Woo Ryu  ;  Byung Hee Lee  ;  Bong Sub Chung  ;  Jung Yong Ahn  ;  Kyung Heo  ;  Young Sik Kho 
 Journal of the Korean Radiologist Society (대한방사선의학회지), Vol.41(6) : 1101-1106, 1999 
Journal Title
Journal of the Korean Radiologist Society(대한방사선의학회지)
Issue Date
Carotid arteries ; interventional procedure ; Carotid arteries ; US
PURPOSE: The aim of this study was to determine a more appropriate method for follow-up of carotid stenting by comparing the efficiency of US and CT angiography. MATERIALS AND METHODS: Eleven carotid arteries of seven patients(men: 5, women: 2, mean age: 56.4years) who underwent stent placement and percutaneous transluminal angioplasty(PTA) because of carotid stenosis were studied. The follow-up periods ranged from three to eleven(mean, five) months, and US and CT angiography were performed in one day. Color duplex sonography was performed with a 10 MHz linear array transducer. After spiral CT scan were obtained, MPR images were reconstructed on a workstation. Retrospective imaging analysis specifically focused on [1] stent configuration, [2] the accuracy of internal diameter measurement, [3] the detection of blood flow and the measurement of blood flow velocity, [4] the presence of atheroma and intraluminal thrombi, [5] the measurement of stent location, and [6] artifacts. RESULT: US was more accurate than CT angiography for measuring internal diameter. In all cases, US and CT angiography were able to detect the blood flow at carotid artery, and utilizing the Doppler spectrum, flow velocity was measured. US showed atheromas in all cases but CT angiography demonstrated calcified atheromas in three cases only. In six cases, US failed to determine stent location, though in this respect CT angiography was successful in all cases. Artifacts of US were small reverbe ration artifact(11/11) of the stent and a defective color Doppler signal caused by acoustic shadowing of atheroma calcification(3/11). Artifacts of CT angiogrpahy were hard-beam artifact of the stent(11/11) and motion artifact(3/11). CONCLUSION: US was superior to CT angiography in accuracy of measuring stent diameter, hemodynamic assessment, high-resolution views of the luminal state of the stent and minimal artifacts for the non-inva s i ve follow-up studies of carotid stenting.
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Ahn, Jung Yong(안정용)
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