320排动态容积CT对心律失常冠状动脉成像价值的研究

目的 探讨在心律失常条件下,320排容积CT(VCT)冠状动脉血管成像的图像质量及其临床价值.方法 心律不齐14例行320排VCT扫描,以优、良、中、差为标准,评价各支冠状动脉的图像质量分布.以60例心律整齐病例为对照,评价不同心率时,心律不齐对图像质量的影响.结果 心率<70次/min时,心律整齐和心律不齐图像质量分布无统计学差异(P=0.390);心率≥70次/min时,心律整齐和心律不齐图像质量分布有统计学差异(P<0.001).心律整齐时,心率过快并不明显影响图像质量(P=0.460);当心律不齐时,心率过快可导致图像质量明显下降(P<0.001),但图像可诊断率仍保持在96.3%.结论 心律失常的情况下,VCTA图像质量仍具有很高的优良率和可评价率,扩大了冠状动脉CTA的应用范围.     

不同流量触发扫描在支气管动脉CT血管成像的对比研究

目的 比较用不同流量触发扫描显示支气管动脉的图像质量,分析不同流量对支气管动脉（BA）CT血管成像（CTA）的影响。方法 选取2019年12月至2021年6月在深圳市宝安区松岗人民医院行BACTA检查的90例患者为研究对象,按照随机数字表法分为A组（55例,注射对比剂30～40 mL）和B组（35例,注射对比剂60～80 mL）,其他扫描方案、造影剂注射及重建方案相同,比较两组研究对象一般资料、诊断结果及各测量点CT值的差异。依据评价标准评价支气管动脉的显示情况,分析两组患者图像主、客观分级差异。结果 两组患者左心房、升主动脉、主动脉弓及降主动脉的CT值比较,差异无统计学意义（P>0.05）。A组患者肺动脉干CT值低于B组（P<0.05）。两组图像质量主观分级比较,差异无统计学意义（P>0.05）。B组图像质量客观分级优于A组（P<0.05）。结论 对于行BACTA检查者,触发扫描位置选择肺动脉干,对比剂用量选择小剂量,也能获得较高质量的图像。     

腹腔动脉CT血管成像固定毫安秒低剂量技术探讨

Objective To characterize the feasibility of low-dose CT angingraphy on 16-slice multislice computed tomography (16-MSCT), and its relationship to the noise in the pre-contrast image and enhancement value.Methods Forty-three consecutive patients (male 21, female 22, mean age 59 years, median age 56 years) underwent abdominal 16-MSCT (Toshiba Aquilion 16) with constant scanning parameters including 120 kVp, a 0.5-second gantry rotation time, a pitch of 0.938: 1, and 16×1-mm detector collimation.The mA was set at 200 in the pre-contrast scan and 160 in the contrast-enhanced scan.The arterial phase images were retrospectively reconstructed with 1-mm slice thickness, 0.8 mm interval.The pre-contrast noise was defined as the standard deviation (SD) of the aorta at the level of right posterior crura of diaphragm.The enhancement of aorta was also measured at level of celiac artery.The volume rendering of CT angiography was made and classified into three grades (excellent, good, bad).Receiver operating characteristic curve (ROC) was used to evaluate the relationship between the image quality of CT angiography and noise in the pre-contrast image and enhancement value.Results Twenty-five cases had the aorta enhancement between 300.0--400.0 HU.The sensitivity and specificity of excellent CTA image was 75% and 62%, respectively when the SD was 12.00.Eighteen cases had the aorta enhancement more than 400.0 HU.The sensitivity and specificity of excellent CTA image was all 100% when the SD was 12.25, and 100% and 75%, respectively when the SD was 13.35.The area under curve of CTA image quality and enhancement in receiver-operated characteristic analysis was O.907.The enhancement was more than 356.7 HU when the sensitivity and specificity of excellent CTA image was 100% and 60%, respectively, and 389.8 HU when 78% and 80%.When the enhancement was more than 442.4 HU, the specificity of excellent CTA image was 100%.Conclusions MSCT angiography with low radiation dose is feasible.Good CT angiography demands great enhancement, and then, the needed mAs is lower when the SD is smaller.     

腹腔动脉CT血管成像固定毫安秒低剂量技术探讨

Objective To characterize the feasibility of low-dose CT angingraphy on 16-slice multislice computed tomography (16-MSCT), and its relationship to the noise in the pre-contrast image and enhancement value.Methods Forty-three consecutive patients (male 21, female 22, mean age 59 years, median age 56 years) underwent abdominal 16-MSCT (Toshiba Aquilion 16) with constant scanning parameters including 120 kVp, a 0.5-second gantry rotation time, a pitch of 0.938: 1, and 16×1-mm detector collimation.The mA was set at 200 in the pre-contrast scan and 160 in the contrast-enhanced scan.The arterial phase images were retrospectively reconstructed with 1-mm slice thickness, 0.8 mm interval.The pre-contrast noise was defined as the standard deviation (SD) of the aorta at the level of right posterior crura of diaphragm.The enhancement of aorta was also measured at level of celiac artery.The volume rendering of CT angiography was made and classified into three grades (excellent, good, bad).Receiver operating characteristic curve (ROC) was used to evaluate the relationship between the image quality of CT angiography and noise in the pre-contrast image and enhancement value.Results Twenty-five cases had the aorta enhancement between 300.0--400.0 HU.The sensitivity and specificity of excellent CTA image was 75% and 62%, respectively when the SD was 12.00.Eighteen cases had the aorta enhancement more than 400.0 HU.The sensitivity and specificity of excellent CTA image was all 100% when the SD was 12.25, and 100% and 75%, respectively when the SD was 13.35.The area under curve of CTA image quality and enhancement in receiver-operated characteristic analysis was O.907.The enhancement was more than 356.7 HU when the sensitivity and specificity of excellent CTA image was 100% and 60%, respectively, and 389.8 HU when 78% and 80%.When the enhancement was more than 442.4 HU, the specificity of excellent CTA image was 100%.Conclusions MSCT angiography with low radiation dose is feasible.Good CT angiography demands great enhancement, and then, the needed mAs is lower when the SD is smaller.     

多層螺旋CT在鼻竇及其相關結構檢查中的應用

目的:利用多層螺旋CT各向同性掃描進行多平面重組(multiplanar reformation,MPR)后處理,顯示鼻竇及其相關結構,探討多層螺旋CT檢查鼻竇及其相關結構的優勢。方法:搜集觀察對象55例(男32例,女23例),年齡9~75歲,利用多層螺旋CT各向同性掃描對副鼻竇進行檢查,然后對所得圖像進行多平面重組(multiplanar reformation,MPR)后處理,重組出標準層面及重點結構的最佳顯示平面,并對某些結構的常規顯示斷面和標準化斷面顯示結果進行統計學分析。結果:①標準橫斷面、冠狀面、矢狀面能清晰顯示各竇腔氣化類型以及左右結構的對稱情況等。②一些特殊結構如鉤突、額竇引流通道、鼻淚管以及蝶篩竇壁與視神經管、頸內動脈的關系需要在斜平面觀察。結論:①一次掃描后,可進行任意平面后處理。減少輻射,避免擺位困難。②多層螺旋CT各向同性一次掃描結合多平面重組(MPR)后處理能夠很好地顯示鼻竇及其相關結構。     

老年硬膜下血肿的CT特征与临床表现

老年人硬膜下血肿有其独特的特点 ,及时行CT检查对临床确诊及治疗有很大的帮助。近年来 ,我们总结了 3 0例年龄 >60岁并手术证实的硬膜下血肿患者的CT表现与临床资料。现报告如下。临床资料 :本组 3 0例 ;男 2 0例 ,女 10例 ;年龄 60～ 70岁 ,平均 77 2岁。 12例 ( 40 % )患者因明显外伤后昏迷、嗜睡前来就诊 ,查体头部均未见骨折 ,病程均为外伤后 3天内。其余 18例外伤史不明确 ,经反复追问、回忆 ,有轻度外伤史者16例 ( 5 3 3 % ) ,无外伤史者 2例 ( 6 7% )。患者主诉主要为头痛、头晕进行性加重 ,肢体活动不灵 ,言语不清。其病程在1～…     

三维CT血管造影诊断脑血管病变的价值

我们对 12例脑血管病变患者行三维 CT脑血管造影检查 ,现将结果报告并分析如下。资料与方法 :本组男 8例 ,女 4例 ;年龄 2 5～ 56岁。脑动脉瘤 2例 ,动静脉畸形 ( AVM) 5例 ,经手术和(或 )数字减影血管造影 ( DSA)证实 ;5例大脑中动脉局限性狭窄 ,经磁共振血管造影 ( MRA)、超声多普勒检查证实。入院后 ,采用 GE公司生产的螺旋扫描 CT机行三维血管成像。扫描条件为 12 0 KV,180 m A,层厚1mm,螺距与层厚比值 ( PITCH)为 1;对比剂为 60 %泛影葡胺 2 82 mg I/ ml,用量 80～ 12 0 ml,给药速度 3ml/ s,按 T=13× 60 / F T12 0 ( CT为…     

经髂内动脉选择性介入治疗膀胱癌

目的探讨膀胱癌数字减影血管造影表现及血管内介入治疗效果。方法96例膀胱癌均行两次髂内动脉灌注化疗，并于治疗前后行髂内动脉造影及B超、膀胱镜检查。结果多血管型54例(56．2％)，少血管型42例(43．8％)。治疗后，完全缓解20例，部分缓解55例，无效21例，总有效率为78．1％。结论数字减影血管造影及介入治疗是膀胱癌有效诊断和非手术治疗的一种方法。     

不孕症女性患者病耻感的研究进展

本文对不孕症女性患者病耻感的现状、影响因素和干预方法进行了综述,从心理护理、家庭护理、健康教育等方面总结干预措施,以期为临床医护人员降低不孕症女性患者病耻感水平提供理论依据.     

腹腔动脉CT血管成像固定毫安秒低剂量技术探讨

Objective To characterize the feasibility of low-dose CT angingraphy on 16-slice multislice computed tomography (16-MSCT), and its relationship to the noise in the pre-contrast image and enhancement value.Methods Forty-three consecutive patients (male 21, female 22, mean age 59 years, median age 56 years) underwent abdominal 16-MSCT (Toshiba Aquilion 16) with constant scanning parameters including 120 kVp, a 0.5-second gantry rotation time, a pitch of 0.938: 1, and 16×1-mm detector collimation.The mA was set at 200 in the pre-contrast scan and 160 in the contrast-enhanced scan.The arterial phase images were retrospectively reconstructed with 1-mm slice thickness, 0.8 mm interval.The pre-contrast noise was defined as the standard deviation (SD) of the aorta at the level of right posterior crura of diaphragm.The enhancement of aorta was also measured at level of celiac artery.The volume rendering of CT angiography was made and classified into three grades (excellent, good, bad).Receiver operating characteristic curve (ROC) was used to evaluate the relationship between the image quality of CT angiography and noise in the pre-contrast image and enhancement value.Results Twenty-five cases had the aorta enhancement between 300.0--400.0 HU.The sensitivity and specificity of excellent CTA image was 75% and 62%, respectively when the SD was 12.00.Eighteen cases had the aorta enhancement more than 400.0 HU.The sensitivity and specificity of excellent CTA image was all 100% when the SD was 12.25, and 100% and 75%, respectively when the SD was 13.35.The area under curve of CTA image quality and enhancement in receiver-operated characteristic analysis was O.907.The enhancement was more than 356.7 HU when the sensitivity and specificity of excellent CTA image was 100% and 60%, respectively, and 389.8 HU when 78% and 80%.When the enhancement was more than 442.4 HU, the specificity of excellent CTA image was 100%.Conclusions MSCT angiography with low radiation dose is feasible.Good CT angiography demands great enhancement, and then, the needed mAs is lower when the SD is smaller.