本文關(guān)鍵詞： 肝臟 磁共振成像 心率　出處：《放射學(xué)實(shí)踐》2017年10期 　論文類型：期刊論文

【摘要】：目的:評(píng)價(jià)心電門控技術(shù)心率因素對(duì)肝臟體素內(nèi)不相干運(yùn)動(dòng)成像(IVIM)圖像質(zhì)量及參數(shù)值的影響。方法:選取20名接受心電門控IVIM-DWI序列掃描的志愿者,設(shè)定6個(gè)b值(范圍0,50,100,150,300,600s/mm2),按受檢者心率分為2組,每組10例,實(shí)驗(yàn)組受檢者心率≤70次/分,對(duì)照組受檢者心率≥80次/分。由兩名從事腹部MR影像診斷5年以上的高年資醫(yī)師對(duì)所得MR圖像進(jìn)行分析,測(cè)量并分析圖像SNR、ADC、IVIM各參數(shù)值,并對(duì)IVIM-DWI圖像質(zhì)量進(jìn)行評(píng)價(jià)。結(jié)果:實(shí)驗(yàn)組所得圖像偽影最少,解剖結(jié)構(gòu)清晰,圖像質(zhì)量較高,不同b值時(shí)實(shí)驗(yàn)組SNR值均大于對(duì)照組,兩組間差異有統(tǒng)計(jì)學(xué)意義(P0.05)。兩組ADC、D、D*、f值中,僅肝左葉的ADC值[實(shí)驗(yàn)組(1.432±0.299)×10-3 mm2/s;對(duì)照組(1.945±0.543)×10-3 mm2/s]和D值[實(shí)驗(yàn)組(1.372±0.378)×10-3 mm2/s;對(duì)照組(1.617±0.361)×10-3 mm2/s]在兩組間的差異有統(tǒng)計(jì)學(xué)意義(P值分別為0.000、0.013)。結(jié)論:肝臟IVIM心電門控成像技術(shù)具有重要的臨床價(jià)值,低心率心電門控IVIM-DWI成像可得到較好的圖像質(zhì)量和穩(wěn)定可靠的參數(shù)值。
[Abstract]:Objective: to evaluate the effect of heart rate factors on hepatic voxel incoherent motion imaging (IVIMI) with electrocardiogram (ECG) gating. Methods: 20 volunteers who received ECG gated IVIM-DWI sequence scanning were selected. Six b values were set up (range 0 ~ 50 ~ 100), 150 ~ 300 ~ 600 s / mm ~ (-2), and divided into 2 groups according to heart rate, 10 cases in each group. The heart rate in the experimental group was less than 70 beats / min. Heart rate 鈮，

本文編號(hào)：1475431