CAJ | 학술논문

目的?评估新生儿低剂量头颅CT扫描的图像质量和临床应用价值.方法对临床怀疑颅脑病变需行CT检查的新生儿80例随机等分成2组,分别行常规剂量和低剂量CT扫描,常规剂量组管电流为180mAs,低剂量组为60mAs,其余参数为管电压120kV,1.5秒/360度,层厚、层间距7mm,轴位扫描,1X3幅图像.记录各组的CT吸收剂量指数(CTDIw);由3位医师采用盲法评判两组扫描剂量的图像质量.结果常规组的CTDIw为45.8mGy,60mA组的CTDIw为9.6mGy,低剂量扫描组的CT吸收剂量指数(CTDIw)仅相当于常规剂量的21.0%,所用图像基本都满足了临床需要.结论螺旋CT应用降低管电流的方法在新生儿头颅扫描时可明显降低射线剂量,并可获得满足临床诊断的图像质量.
목적?평고신생인저제량두로CT소묘적도상질량화림상응용개치.방법대림상부의로뇌병변수행CT검사적신생인80례수궤등분성2조,분별행상규제량화저제량CT소묘,상규제량조관전류위180mAs,저제량조위60mAs,기여삼수위관전압120kV,1.5초/360도,층후、층간거7mm,축위소묘,1X3폭도상.기록각조적CT흡수제량지수(CTDIw);유3위의사채용맹법평판량조소묘제량적도상질량.결과상규조적CTDIw위45.8mGy,60mA조적CTDIw위9.6mGy,저제량소묘조적CT흡수제량지수(CTDIw)부상당우상규제량적21.0%,소용도상기본도만족료림상수요.결론라선CT응용강저관전류적방법재신생인두로소묘시가명현강저사선제량,병가획득만족림상진단적도상질량.
Objective Assessment of neonatal low-dose cranial CT scan image quality and clinical application value. Methods On clinical suspicion of brain lesions requiring CT examination in 100 cases of neonates with random divided into 2 groups, respectively, conventional dose and low dose CT scanning, conventional dose group of tube current of 180mAs, low dose group for 60mAs, the remaining parameters for the tube voltage 120Kv, 1.5 seconds/360, thickness 7mm, axial scan, 1X3 image. Recording groups of CT absorbed dose index ( CTDIw );by 3 physicians blinded evaluation of two group of scan dose image quality. Result The conventional group CTDIw 45.8mGy, CTDIw 9.6mGy 60mA group, low dose scan group CT absorbed dose index (CTDIw) is equivalent to conventional doses of 21.0%, the use of the image are basically meet the clinical needs. Conclusion Application of spiral CT lower tube current method in neonatal cranial scan can be obviously reduced radiation dose, and can obtain satisfied clinical diagnostic image quality.