【摘要】：目的探討低濃度對(duì)比劑低管電壓在過(guò)輕或適中體重患者腹部CT增強(qiáng)掃描中應(yīng)用的可行性,尋找減少腹部CT增強(qiáng)掃描射線劑量及碘攝取量的最優(yōu)方案。資料與方法選取體重指數(shù)(BMI)20 kg/m2的40例過(guò)輕患者,隨機(jī)分為A1組和B1組,每組20例;同時(shí)選取20 kg/m2≤BMI25 kg/m2的40例適中體重患者,隨機(jī)分為A2組和B2組,每組20例。A1組和A2組采用低濃度對(duì)比劑低管電壓(威視派克270mg I/ml,管電壓100 k V)行腹部CT增強(qiáng)掃描,B1組和B2組采用常規(guī)掃描方案(歐乃派克300 mg I/ml,管電壓120 k V)行腹部CT增強(qiáng)掃描。比較4組的對(duì)比噪聲比(CNR)、圖像質(zhì)量評(píng)分和有效射線劑量(ED)。結(jié)果 A1組和B1組、A2組和B2組動(dòng)脈期、門(mén)靜脈期的CNR及圖像質(zhì)量評(píng)分比較差異均無(wú)統(tǒng)計(jì)學(xué)意義(t=-1.539~0.000,P0.05);B1組動(dòng)脈期CNR及圖像質(zhì)量評(píng)分明顯高于A2組和B2組,差異均有統(tǒng)計(jì)學(xué)意義(P0.05)。結(jié)論低濃度對(duì)比劑低管電壓掃描方案可以在降低碘攝取量及輻射的同時(shí)獲得與常規(guī)增強(qiáng)掃描同等的腹部圖像質(zhì)量;BMI對(duì)肝臟動(dòng)脈期圖像質(zhì)量影響較大,對(duì)門(mén)靜脈期圖像質(zhì)量影響較小,可考慮在肝臟增強(qiáng)檢查協(xié)議中選擇性降低門(mén)靜脈期電壓以降低輻射。
[Abstract]:Objective to explore the feasibility of using low concentration contrast agent and low tube voltage in abdominal CT enhanced scanning in patients with light or moderate body weight, and to find the best scheme to reduce the dose and iodine intake of abdominal CT enhanced scanning. Materials and methods 40 underweight patients with body mass index (BMI) 20 kg/m2 were randomly divided into A1 group and B1 group with 20 cases in each group. At the same time, 40 moderate weight patients with 20 kg/m2 鈮，

本文編號(hào)：2303302