本文選題：輻射劑量 + 冠心病�。� 參考：《醫(yī)學(xué)影像學(xué)雜志》2013年02期

【摘要】：目的比較雙源Flash CT前瞻性心電門控(簡(jiǎn)稱前門控)序列掃描實(shí)驗(yàn)組(窄R-R間期)與對(duì)照組(寬R-R間期)的診斷準(zhǔn)確率、圖像質(zhì)量及輻射劑量。方法每組各納入100例患者,采用前門控序列掃描,管電壓120kV,管電流通過care dose4D自動(dòng)調(diào)節(jié)。實(shí)驗(yàn)組:當(dāng)心率≤75次/min時(shí),65%～75%R-R間期曝光;心率75次/min時(shí),35%～45%R-R間期曝光。對(duì)照組:35%～70%R-R間期曝光。由2名放射科醫(yī)師采用雙盲法對(duì)兩組患者的圖像質(zhì)量進(jìn)行主觀評(píng)分,結(jié)果不一致時(shí)由1名高年資醫(yī)師裁定。記錄所有患者的劑量長(zhǎng)度乘積(DLP),計(jì)算出有效輻射劑量(ED)。實(shí)驗(yàn)組有53例、對(duì)照組有51例患者行冠狀動(dòng)脈造影(CAG)。結(jié)果實(shí)驗(yàn)組與對(duì)照組的診斷準(zhǔn)確率和圖像質(zhì)量主觀評(píng)分差異無統(tǒng)計(jì)學(xué)意義(P0.05)。實(shí)驗(yàn)組有效輻射劑量(3.01±0.45)mSv,對(duì)照組有效輻射劑量(6.91±0.38)mSv,差異有統(tǒng)計(jì)學(xué)意義(P0.05)。結(jié)論雙源Flash CT前門控序列掃描窄R-R間期曝光在保證診斷準(zhǔn)確率及圖像質(zhì)量的前提下可明顯降低輻射劑量,是冠心病患者的一種安全可靠的檢查方法。
[Abstract]:Objective to compare the diagnostic accuracy, image quality and radiation dose between the experimental group (narrow R-R interval) and the control group (wide R-R interval) by dual source Flash CT prospective ECG gating. Methods one hundred patients in each group were scanned by the front door control sequence. The voltage of the tube was 120kV, and the current of the tube was automatically adjusted by care dose4D. The experimental group: when the heart rate 鈮，

本文編號(hào)：1809027