本文選題：體層攝影術(shù)　切入點(diǎn)：X線計(jì)算機(jī)　出處：《中國(guó)醫(yī)學(xué)計(jì)算機(jī)成像雜志》2015年02期

【摘要】：目的:比較前瞻性心電門控窄窗掃描與靶向掃描方式在320層冠狀動(dòng)脈成像中的輻射劑量、圖像質(zhì)量。方法:對(duì)臨床擬診冠心病、心率65次/min的200例患者依次分別采用前瞻性門控窄窗掃描和靶向掃描方式冠狀動(dòng)脈成像掃描方案,分為P組(Prospect-ive CTA前瞻組,70%~80%的窄曝光窗)和T組(Target CTA靶向組,固定期相75%曝光窗),評(píng)價(jià)兩組的輻射劑量、圖像質(zhì)量及診斷結(jié)果。結(jié)果:P組和T組各有1500(15×10 0)個(gè)冠狀動(dòng)脈節(jié)段,P組和T組冠狀動(dòng)脈節(jié)段管徑太小(1.5m m)難以評(píng)估分別占3.53%(53/150 0)、3.8%(57/1500),可評(píng)估節(jié)段占96.47%(1447/1500)、96.2%(1443/1500),差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05);在可評(píng)估冠狀動(dòng)脈節(jié)段中,P組的1分、2分、3分及4分圖像分別占98.82%(1426/1443)、0.9%(13/1443)、0.27%(4/1443)及0,T組的為95.02%(1376/1447)、1.93%(28/1447)、2.41%(35/1447)及0.55%(8/1447)。P組和T組的圖像評(píng)分差異有統(tǒng)計(jì)學(xué)意義(P0.05)。P組和T組平均輻射劑量為(2.36±0.21)m Sv、(2.31±0.2)m Sv,P組和T組的平均輻射劑量差異無(wú)統(tǒng)計(jì)學(xué)意義(P0.05)。結(jié)論:320層CT在低心率冠狀動(dòng)脈成像中前瞻性門控窄窗掃描的圖像質(zhì)量及掃描成功率優(yōu)于靶向掃描。前瞻性門控窄曝光窗掃描可替代靶向掃描。
[Abstract]:Aim: to compare the radiation dose and image quality of prospective ECG gated narrow window scan and target scan in 320 slice coronary artery imaging.Methods: 200 patients with clinically suspected coronary heart disease (CHD) and heart rate (HR) 65 / min were examined with prospective gated narrow window scan and targeted coronary angiography respectively.Group P was divided into Prospect-ive CTA prospective group (70% narrow exposure window) and T group (target CTA target group, fixed phase 75% exposure window). The radiation dose, image quality and diagnostic results of the two groups were evaluated.涓，

本文編號(hào)：1723545