【摘要】：目的探討低濃度對(duì)比劑、低管電壓結(jié)合自適應(yīng)統(tǒng)計(jì)迭代重組算法(ASIR)用于低體質(zhì)量指數(shù)(BMI)患者門靜脈血管成像(CTPV)的可行性。方法搜集擬接受CTPV檢查、BMI22的患者164例,分為雙低掃描組(對(duì)比劑濃度270 mg I/ml,管電壓80 k Vp,加50%ASIR進(jìn)行圖像重組)、常規(guī)掃描組(對(duì)比劑濃度350 mg I/ml,管電壓120 k Vp)。比較兩組圖像質(zhì)量評(píng)分、門靜脈及肝實(shí)質(zhì)CT值、肝實(shí)質(zhì)噪聲值(SD值)、門靜脈對(duì)比噪聲比(CNR)、CT劑量指數(shù)(CTDIvol)、有效輻射劑量(ED)及總碘含量差異。結(jié)果雙低掃描組門靜脈左支圖像質(zhì)量評(píng)分高于常規(guī)掃描組(Z=-4.581,P0.05),門靜脈右支圖像質(zhì)量評(píng)分兩組差異無統(tǒng)計(jì)學(xué)意義(Z=-0.74,P0.05);門靜脈CT值、肝實(shí)質(zhì)CT值和SD、門靜脈CNR雙低掃描組均高于常規(guī)掃描組(P均0.01),雙低掃描組CTDIvol低于常規(guī)掃描組(P0.01),ED雙低掃描組低于常規(guī)掃描組,差異無統(tǒng)計(jì)學(xué)意義(P0.05)。雙低掃描組總碘含量較常規(guī)掃描組降低22.86%。結(jié)論對(duì)低BMI患者行CTPV時(shí)采用低濃度對(duì)比劑、低管電壓結(jié)合ASIR可在保證成像質(zhì)量的同時(shí)有效降低輻射劑量和總碘含量,對(duì)臨床個(gè)體化掃描有重要的參考價(jià)值。
[Abstract]:Objective to investigate the feasibility of low concentration contrast agent, low tube voltage combined with adaptive statistical iterative recombination algorithm (ASIR) in portal vein angiography (CTPV) in patients with low body mass index (BMI). Methods Sixty four patients undergoing CTPV examination and BMI22 were divided into two groups: double low scanning group (contrast agent concentration 270 mg I 鈮，

本文編號(hào)：2507746