摘要
目的探讨64排螺旋CT在低碘对比剂剂量和低辐射剂量下施行肺动脉血管造影(CTPA)成像技术在诊断肺动脉栓塞的可行性。方法选取本院2021-2023年度疑似患有肺动脉栓塞的受检者60例。所有受检者均接受CTPA检查,将受检者分为常规剂量组管电压120KV,碘对比剂剂量30~40ml(30例)和低剂量组管电压100KV,碘对比剂剂量15mL(30例)均使用非离子型水溶性碘对比剂碘美普尔(400gl/100mL)。两组受检者均憋气扫描完成,比较两组受检者的CT值、背景噪声、信噪比(signal to noise ratio,SNR)、容积CT剂量指数(computed tomography dose index,CTDIvoI)、剂量长度乘积(dose length product,DLP)。结果低剂量组与常规剂量组的CT值、背景噪声、SNR、DLP、CTDIvoI相比有差异有统计学意义(P<0.01)。低剂量组与常规剂量组的图像质量相比没有统计学意义(P>0.05)。低剂量组与常规剂量组相比,其动脉栓塞检出率没有统计学意义(P>0.05)。结论在肺动脉血管造影(CTPA)成像上选用双低剂量,能够减少受检者发生碘对比剂肾病(contrast induced nephronpathy,CIN)并降低所承受到的辐射剂量,且双低剂量CTPA成像对肺动脉栓塞检查可行性高值得临床应用及推广。
Objective To investigate the feasibility of pulmonary angiography(CTPA)with 64-slice spiral CT in the diagnosis of pulmonary embolism at low iodine contrast dose and low radiation dose.Methods A total of 60 patients suspected to have pulmonary embolism in our hospital from 2021 to 2023 were selected.All subjects underwent CTPA examination.Subjects were divided into a conventional dose group with a dose of iodine contrast 30-40mL(120KV)and a low-dose group with a dose of iodine contrast 30-40mL(100KV)and a non-ionic water-soluble iodine contrast agent iomepol(400gl/100mL).The patients in both groups were suffused with breath.CT values,background Noise,Signal to Noise Ratio(SNR)and Computed Tomography Dose Index were compared between the two groups.CTDIvoI ,Dose Length Product(DLP).Results There were significant differences in CT value,background noise,SNR,DLP and CTDIvoI between low-dose group and conventional dose group(P<0.01).There was no statistical significance in image quality between the low-dose group and the conventional dose group(P>0.05).The detection rate of arterial embolism in the low-dose group was not statistically significant compared with the conventional dose group(P>0.05).Conclusion The Contrast Induced Nephronpathy(CIN)and the dose of radiation received by CTPA can be reduced by using double low dose.Moreover,double low-dose CTPA imaging is highly feasible and worthy of clinical application and promotion for pulmonary embolism.
作者
汪劭川
曾一红
孙政文
许馨予
成启华
WANG Shao-chuan;ZENG Yi-hong;SUN Zheng-wen;XU Xin-yu;CHENG Qi-hua(The Second Affiliated Hospital of Xiamen Medical College,Xiamen 361021,Fujian Province,China)
出处
《中国CT和MRI杂志》
2024年第1期68-70,共3页
Chinese Journal of CT and MRI
关键词
肺动脉栓塞
肺动脉血管造影CTPA
双低剂量
碘对比剂
计算机体层摄影技术
Pulmonary Embolism
Pulmonary Artery Angiography CTPA
Double Low Dose
Iodine Contrast Agent
Computer Layer Lifting Photography
