猪腹部脂肪的低剂量螺旋CT扫描  

Experimental study of the abdominal adipose tissue of swine with low-dose CT

作　　者：谢应朗 杜晓瑜[2] 肖涌[3] 唐学荣 何霞[2] 范洪毅[1] 

机构地区：[1]雅安市人民医院放射科,四川625000 [2]雅安市人民医院检验科,四川625000 [3]雅安市人民医院内分泌科,四川625000

出　　处：《放射学实践》2010年第5期478-480,共3页Radiologic Practice

基　　金：四川省卫生厅科学研究立项项目(070015)

摘　　要：目的:利用猪腹部脂肪组织作模型,确定低剂量CT扫描检测脂肪组织的准确性。方法:采用不同剂量和不同层厚,对模型进行扫描。在3个模型上分别设置4条扫描线,每条线相距1 cm。扫描分9组,每组分10 mm,5 mm,2 mm三种层厚,每种层厚分别采用100 mA,50 mA,20 mA剂量扫描。扫描时间1 s。结果:模型扫描显示扫描层厚为10 mm时,剂量100 mA、50 mA、20 mA之间,脂肪CT值均数比较,差异无统计学意义(P>0.05);扫描层厚为5 mm时,剂量100 mA、50 mA、20 mA之间,脂肪CT值均数比较,差异无统计学意义(P>0.05);扫描层厚为2 mm时,剂量100 mA、50 mA、20 mA之间,脂肪CT值均数比较,差异无统计学意义(P>0.05)。结论:低剂量扫描能准确测量脂肪CT值,可用于区域脂肪定量。Objectives：This study is to use the abdominal adipose tissue of swine as phantom,to determine the feasibility of low-dose CT in the examination and measurement of fatty tissue in human being.Methods：Four scanning lines with the distance between each line as 1cm were set respectively on three swine phantoms.The experiment was divided into nine groups including scanning slice thickness of the phantom as 10mm,5mm,2mm and the exposure dosage of each slice thickness as 100mA,50mA,20mA respectively.The time of scanning was 1s.Results：No significant statistic differences were shown on the mean CT value of adipose tissue on the phantom scanning with the slice thickness as 10mm and the exposure dosage as 100mA,50mA,20mA respectively（P〉0.05）;as well as 5mm slice thickness with 100mA,50mA,20mA（P〉0.05）.and 2mm slice thickness with 100mA,50mA,20mA respectively（P〉0.05）.Conclusion：The CT value of adipose tissue could be accurately measured by low-dose CT scanning,which is helpful in the quantitative measurement of regional adipose tissue.

关 键 词：脂肪组织 体层摄影术 X线计算机 辐射剂量 

分 类 号：R816.5[医药卫生—放射医学]