【摘要】：目的采用低速對(duì)比劑注射方案聯(lián)合單期相CT能譜掃描技術(shù)進(jìn)行兒童腹部增強(qiáng)CT檢查,探討低速對(duì)比劑注射方案在兒童腹部增強(qiáng)CT檢查中的可行性。方法收集腹部腫瘤化療后CT復(fù)診需評(píng)估瘤灶的患兒45例,首診檢查數(shù)據(jù)設(shè)為A組,采用常規(guī)對(duì)比劑注射方案及常規(guī)腹部CT三期增強(qiáng)掃描方案;化療后接受增強(qiáng)CT掃描的數(shù)據(jù)為B組,采用低速對(duì)比劑注射方案結(jié)合增強(qiáng)CT能譜單期掃描模式。記錄對(duì)比劑注射速度、注射完成時(shí)間、注射過程中血管內(nèi)最大注射壓力、患者接受的輻射劑量。由2名高年資影像醫(yī)師采用盲法對(duì)B組40keV和60keV序列的能譜CT圖像的動(dòng)、靜脈及腹部實(shí)質(zhì)臟器顯像質(zhì)量進(jìn)行4分制及5分制的主觀評(píng)分,評(píng)分≥3分認(rèn)為可用于臨床診斷。結(jié)果 A組的對(duì)比劑注射速度、注射時(shí)最大壓力及輻射劑量均明顯大于B組(P均0.001);2名醫(yī)生對(duì)兩組血管和腹部實(shí)質(zhì)臟器的主觀評(píng)分均≥3分,且診斷一致性好(κ分別為0.89和0.75)。結(jié)論使用低速對(duì)比劑注射方案聯(lián)合單期相CT能譜掃描技術(shù)進(jìn)行兒童腹部腫瘤增強(qiáng)CT檢查具有可行性。
[Abstract]:Objective to investigate the feasibility of low-speed contrast medium injection regimen combined with single-phase CT energy dispersive scanning for abdominal enhanced CT in children. Methods Forty-five children with CT need to be evaluated for tumor focus after chemotherapy of abdominal neoplasms. The data of the first diagnosis were set as group A, and the routine contrast medium injection regimen and conventional three-phase enhanced abdominal CT scan regimen were used. Group B received enhanced CT scan after chemotherapy. Low contrast medium injection regimen and enhanced CT energy spectrum single phase scanning mode were used. The rate of injection, the time of completion, the maximum intravascular pressure during injection, and the dose of radiation received by the patient were recorded. Two senior imaging physicians used blind method to evaluate the arterial, venous and abdominal parenchymal visceral imaging quality of 40keV and 60keV sequences in B group by 4 points system and 5 points system. The score 鈮，

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