CAJ | 학술논문

目的探讨临床应用低剂量技术降低CT引导下经皮肺穿刺自动切割活检(ACNB)辐射剂量的可行性.方法 412例ACNB中146例(A组)采用传统方法引导,266例(B组)采用低剂量技术引导,按图像颗粒均匀性、解剖结构细节、界面清晰度和有无伪影等评定图像质量,比较2组穿刺活检准确率、操作时问及辐射剂量,并探讨CT引导中降低辐射剂量的方法.结果 B组图像解剖结构细节分辨率降低,但不影响穿刺成功率.A、B组穿刺准确率分别为95.9%、95.1%,操作时间为(16±2.2)、(15.9±2.0)rain,组间差异均无统计学意义.A、B组有效剂量为(1.74.±0.7)及(0.59±0.14)mSv,B组有效剂量降低66%,差异有统计学意义(t＝19.3415,P＜0.05).结论 CT引导下经皮肺穿刺活检是诊断和鉴别肺部病变的重要方法,低剂量扫描、缩小扫描范围及减少扫描次数能显著降低受检者x线辐射剂量,但不影响诊断效果.
목적 탐토림상응용저제량기술강저CT인도하경피폐천자자동절할활검(ACNB)복사제량적가행성.방법 412례ACNB중146례(A조)채용전통방법인도,266례(B조)채용저제량기술인도,안도상과립균균성、해부결구세절、계면청석도화유무위영등평정도상질량,비교2조천자활검준학솔、조작시문급복사제량,병탐토CT인도중강저복사제량적방법.결과 B조도상해부결구세절분변솔강저,단불영향천자성공솔.A、B조천자준학솔분별위95.9%、95.1%,조작시간위(16±2.2)、(15.9±2.0)rain,조간차이균무통계학의의.A、B조유효제량위(1.74.±0.7)급(0.59±0.14)mSv,B조유효제량강저66%,차이유통계학의의(t＝19.3415,P＜0.05).결론 CT인도하경피폐천자활검시진단화감별폐부병변적중요방법,저제량소묘、축소소묘범위급감소소묘차수능현저강저수검자x선복사제량,단불영향진단효과.
Objective To evaluate the dose reduction technology using in CT-guided percutaneous lung biopsy of pulmonary lesions using automated core needle biopsies (ACNB).Methods 412 ACNB cases included 146 consecutive conventional patients (group A,120 kV/100 mA) and 266 consecutive patients (group B,120 kV/20 mA,low-dose scanning,reduce scanning width and scanning frequency).The quality of images was compared by grain homogeneity,fine structure,clearness of tissue interface and artifacts.The total diagnostic accuracy rate,the examination time and radiation dose between group A and group B were compared.Results The fine structure of group B was significantly lower (X~2 ＝7.0508,P ＜ 0.05).The total diagnostic accuracy rate was 95.9% vs 95.1% (X~2 ＝0.1296,P ＜ 0.05).The examination time for biopsy procedure was (16 ±2.2)min vs (15.9 ±2.0)min (t ＝ 1.3579,P ＜ 0.05) ,and the mean effective dose (E) was (1.74 ± 0.7) mSv vs (0.59 ± 0.14) mSv (t ＝ 19.3415 ,P ＜ 0.05) .The E of group B decreased by 66%.Conclusions ACNB is a feasible and accurate method for diagnosing pulmonary lesions,and the E can significantly reduce the dose received in low-dose scanning.