16层螺旋CT血管成像在颅内动脉瘤诊断中的价值

目的:探讨16层螺旋CT血管成像(CTA)在颅内动脉瘤诊断中的价值.方法:对临床疑诊为颅内动脉瘤16例患者行CTA检查,其中8例同期行数字减影血管造影(DSA)检查.原始图像重建采用最大密度投影(MIP)和容积再现技术(VR).结果:16例患者经CTA检出动脉瘤17个.1例患者为多发动脉瘤(2个),15例为单发动脉瘤.瘤体以圆形或卵圆形居多(13个),也可以显示为肾形(2个)、葫芦形(1个)和串蛛状(1个).瘤体最大直径18 mm,最小直径1.5 mm.8例行DSA检查的患者中,7例DSA所见与CTA结果一致,1例DSA漏诊1个动脉瘤.结论:16层CTA检出动脉瘤准确率高,快速、无创,可以作为诊断动脉瘤首选影像学方法,尤其适合于急诊情况下,并能补充DSA诊断信息.     

64层螺旋CT与数字减影血管造影对颅内动脉瘤诊断的比较

目的 通过64层螺旋CT的CT血管造影(CTA)及CT数字减影血管造影(CTDSA)技术与数字减影血管造影(DSA)的比较研究,评价64层螺旋CT在颅内动脉瘤诊断中的临床应用价值。方法 26例临床怀疑颅内动脉瘤的患者实施64层CT和DSA检查,对64层CT图像进行了CTA和DSCTA两种方式的后处理。CTA后处理技术包括容积再现(VR),最大密度投影(MIP)和多平面重建(MPR),在CTA图像基础上用增强数据逐层减去平扫数据,自动去除骨与脑组织,获得CTDSA影像。比较3种技术(DSA、CTA和CTDSA)的特征。结果 26例可疑患者中,DSA和CTDSA发现31个动脉瘤,CTA发现29个动脉瘤。CTA漏掉的2个动脉瘤,直径小于3mm。结论 CTDSA是检查颅内动脉瘤的高度敏感的影像学方法,具有与DSA相当的价值。     

64层3D-CTA与3D-DSA对颅内动脉瘤评价的对比研究

目的 对比评价64层螺旋CT三维血管造影(3D-CTA)与三维数字减影血管造影(3D-DSA)对颅内动脉瘤的诊断价值.方法 28例临床怀疑颅内动脉瘤的患者均行64层螺旋CT血管造影和DSA,CT三维后处理主要包括容积重建(VR)及最大密度投影(MIP).常规二维DSA检查后,对可疑病变血管行旋转DSA检查,应用三维工作软件行3D后处理,比较3D-CTA与3D-DSA对动脉瘤显示的价值.结果 28例病例中22例CTA和DSA均显示动脉瘤并经手术或栓塞证实,其中1例CTA和DSA显示单个动脉瘤,手术证实为2个动脉瘤,1例CTA显示假阳性.3D-CTA与3D-DSA均能清楚显示动脉瘤形状、瘤径指向、瘤体直径、瘤颈、载瘤动脉、瘤体穿动脉情况,两者无明显差异.结论 64层3D-CTA在颅内动脉瘤诊断及细节显示上与3D-DSA无明显差异,一定程度上应能替代血管造影,指导临床治疗.     

128层螺旋CT数字减影血管成像对颅内动脉瘤的诊断价值

目的评价128层螺旋CT数字减影血管成像对颅内动脉瘤的诊断价值。方法60例临床怀疑颅内动脉瘤的患者分别进行128层螺旋CT数字减影血管成像（Digital subtraction angiography,DSACTA）和数字减影血管造影（DSA）,并对照手术或介入栓塞治疗结果评估其诊断价值。结果DSACTA共发现58例66个动脉瘤,其中52例为单个动脉瘤,4例为两个动脉瘤,2例多发动脉瘤。动脉瘤直径最小2mm,最大30mm。DSA检出60例68个动脉瘤,以DSA检出结果为金标准,128层螺旋CT数字减影血管成像,诊断符合率97．1％,2例2个小动脉瘤漏诊,漏诊率2．9％。结论DSACTA诊断颅内动脉瘤有较高准确性,可部分取代DSA造影检查。     

16层螺旋CT血管造影在颅内动脉瘤中的应用价值

目的探讨16层螺旋CT血管造影(CTA)对颅内动脉瘤的诊断价值。方法28例疑有颅内动脉瘤患者均行16层CTA和DSA检查,对CTA的表现结合DSA和手术结果进行回顾性分析。结果本组28例经CTA共检出动脉瘤27个,其中25个经手术和DSA证实。1例CTA显示动脉瘤2个,DSA只显示1个,另1例CTA显示可疑动脉瘤2个,DSA显示正常。16层CTA诊断颅内动脉瘤的敏感性为89.2%,特异性为100%,准确性为96.4%。结论16层CTA在显示颅内动脉瘤方面可与DSA媲美,有重要临床应用价值。     

电解可脱弹簧圈治疗颅内动脉瘤

目的:探讨电解可脱弹簧圈治疗颅内动脉瘤的临床效果。材料和方法:CT以及DSA检查证实为颅内动脉瘤65例,66个动脉瘤。在神经安定麻醉和全身肝素化的条件下,经Tracker-10或Tracker-18微导管放置电解可脱性弹簧圈对脑动脉瘤患者进行栓塞治疗,手术在DSA动态监视下完成。结果:66个动脉瘤中,瘤体大小为3.5mm×3.8mm~5.4mm×4.5mm。64例栓塞成功,成功率为97%;2例因载瘤动脉严重痉挛而失败(3%),其中100%闭塞48个(72.7%);栓塞程度达95%以上9个(13.6%);90%闭塞7个(10.6%)。术后回访3~24个月,未发现蛛网膜下腔再次出血。结论:电解可脱弹簧圈栓塞颅内动脉瘤具有微创、安全、效果可靠的优点。     

多层螺旋CT血管成像诊断颅内动脉瘤的价值

目的:探讨多层螺旋CT血管成像诊断颅内动脉瘤的价值。材料和方法:对比分析21例颅内动脉瘤的多层螺旋CT血管成像(MSCTA)和数字减影血管成像(DSA)的表现。结果:21例中,MSCTA发现21个动脉瘤,DSA发现20个动脉瘤,其中1例双侧动脉瘤,DSA只发现1侧,另1例MSCTA及DSA均未发现病变;21个动脉瘤中18个为圆形或类圆形,3个为不规则形,平均最长径为6.9mm(2.2~15mm);21个动脉瘤1个位于后交通动脉,2个位于基底动脉,5个位于大脑前动脉,5个位于大脑中动脉,8个位于前交通动脉。结论:MSCTA对颅内动脉瘤的诊断具有较高价值,可以作为外科治疗或介入治疗颅内动脉瘤的筛选方法。     

16层螺旋CT血管造影诊断颅内动脉瘤

目的:探讨16层螺旋CT血管造影(MSCTA)诊断颅内动脉瘤的准确性。材料和方法:30例临床怀疑颅内动脉瘤的患者分别进行16层螺旋CT脑血管三维成像(3D-MSCTA)和数字减影血管造影(DSA),所有病例均完成多层面重建(MPR)、三维表面遮盖显示(SSD)、容积显示(VR)和薄层块最大密度投影(MIP),并对照手术或介入栓塞结果评估其诊断价值。结果:MSCTA共发现24例28个动脉瘤,其中22例为单个动脉瘤,2例为两个动脉瘤。动脉瘤直径最小2.7mm,最大35mm。MSCTA能清晰显示动脉瘤的瘤体大小、瘤颈、瘤轴指向、载瘤动脉及其动脉瘤与临近血管分支和骨性组织间的空间关系。23例与手术/DSA结果一致。结论:MSCTA诊断颅内动脉瘤有较高准确性,可部分取代DSA造影检查。     

16层螺旋CT血管造影在颅内动脉瘤破裂中的临床应用

目的通过与DSA和手术对照,探讨16层螺旋CT血管造影（CTA）在颅内动脉瘤破裂的临床应用价值。资料与方法对33例动脉瘤性蛛网膜下腔出血（SAH）、脑出血患者进行回顾性分析,33例均使用16层螺旋CT进行了CTA检查,其中18例行DSA检查;6例DSA下介入治疗,27例开颅行动脉瘤颈夹闭术;将CTA与DSA和术中所见对照。结果33例中,CTA共发现动脉瘤36个,其中18例行DSA检查者中,CTA发现动脉瘤20个,DSA发现动脉瘤21个;CTA能够清晰显示动脉瘤瘤体（形态、指向、轮廓）、瘤颈的宽度、载瘤动脉及与颅骨之间的关系;与DSA和手术对照,CTA对动脉瘤的检出率为95．2％,对破裂动脉瘤的诊断敏感性和特异性均为100％。结论16层螺旋CT脑血管造影重组图像质量高,安全、快速、无创,可以作为颅内动脉瘤破裂首选的筛检方法。     

Detection and evaluation of intracranial aneurysms with 16-row multislice CT angiography

AIM: The aim of this study was to assess the usefulness of 16-row multislice CT angiography (CTA) in evaluating intracranial aneurysms, by comparison with conventional digital subtraction angiography (DSA) and intraoperative findings. METHODS: A consecutive series of 57 patients, scheduled for DSA for suspected intracranial aneurysm, was prospectively recruited to have CTA. This was performed with a 16-detector row machine, detector interval 0.75 mm, 0.5 rotation/s, table speed 10mm/rotation and reconstruction interval 0.40 mm. CTA studies were independently and randomly assessed by two neuroradiologists and a vascular neurosurgeon blinded to the DSA and surgical findings. Review of CTA was performed on workstations with an interactive 3D volume-rendered algorithm. RESULTS: DSA or intraoperative findings or both confirmed 53 aneurysms in 44 patients. For both independent readers, sensitivity and specificity per aneurysm of DSA were 96.2% and 100%, respectively. Sensitivity and specificity of CTA were also 96.2% and 100%, respectively. Mean diameter of aneurysms was 6.3mm (range 1.9 to 28.1 mm, SD 5.2 mm). For aneurysms of less than 3 mm, CTA had a sensitivity of 91.7% for each reader. Although the neurosurgeon would have been happy to proceed to surgery on the basis of CTA alone in all cases, he judged that DSA might have provided helpful additional anatomical information in 5 patients. CONCLUSION: The diagnostic accuracy of 16-slice CTA is promising and appears equivalent to that of DSA for detection and evaluation of intracranial aneurysms. A strategy of using CTA as the primary imaging method, with DSA reserved for cases of uncertainty, appears to be practical and safe.     

多层CT血管成像与数字减影血管造影诊断颅内微小动脉瘤的比较

目的 探讨MSCTA对最大径≤3 mm颅内微小动脉瘤(IMA)的诊断价值.方法 回顾性分析连续826例可疑颅内动脉瘤患者的临床和影像资料.全部患者住院前(发病后2 h～4 d)均采用16层螺旋CT行MSCTA,全部颅内动脉瘤均经DSA、三维旋转数字减影血管造影(3DRA)或手术证实.MSCTA、DSA及3DRA等影像资料由2名放射科医师独立进行分析.以DSA或3DRA为标准,计算MSCTA诊断IMA的敏感性、特异性及准确度,采用Kappa分析,评价DSA或3DRA与MSCTA两种检查方法诊断颅内IMA的一致性.采用X~2检验分析IMA与非IMA患者多发动脉瘤的患病率.结果 826例可疑颅内动脉瘤患者中,788例为颅内动脉瘤患者,单发706例,多发82例,共发现889个动脉瘤,38例MSCTA、DSA或3DRA检查结果均为阴性.经DSA或3DRA检查证实,212例患者(271个动脉瘤)共有232个IMA.MSCTA检出229个IMA,假阳性1例,漏诊4个.以DSA或3DRA为标准,MSCTA诊断IMA的敏感性、特异性、准确度分别为98.3%(228/232)、97.4%(38/39)、98.2%(266/271).两种检查方法有较强的一致性(Kappa值为0.927,P<0.05).IMA与非IMA患者多发动脉瘤患病率分别为21.2%(45/212)、6.4%(37/576),差异有统计学意义(X~2=36.421,P<0.01).结论 MSCTA诊断IMA具有较高价值,鉴于MSCTA对IMA的检出达到≤3 mm水准,提出将颅内IMA影像大小界定从4～5 mm调整为≤3 mm.     

追踪触发技术MSCTA在颅内动脉瘤诊断中的应用

目的:评价追踪触发技术CTA在颅内动脉瘤中的临床应用价值.方法:70例自发性蛛网膜下腔出血患者行M SCTA和DSA检查.GE lightspeed 16采集原始数据,应用Smart Prep选件,监测颈总动脉分叉水平下一层面颈总动脉的密度,CT值达85Hu时启动扫描,注射速率为3.5ml/s.采用容积显示(VR)、最大密度投影(MIP)和CT仿真内镜三种后处理技术.所得图像分别由3位放射科医生和2位神经外科医生评价,分析其部位、大小、形状以及与周围结构的关系.结果:70例患者中,58例患者共发现65个动脉瘤,漏诊2个动脉瘤.前交通动脉19例,大脑中动脉12例,大脑前动脉10例,颈内动脉海绵窦段16例,基底动脉6例,小脑上动脉1例,小脑下后动脉1例.瘤体直径平均约6.88 mm,最大14.3mm,最小2.0mm,与DSA测量结果经t检验无显著性差异.3D图像显示瘤体、瘤颈和载瘤动脉与周围血管及颅骨的关系清晰、确切.结论:3D-MSCTA可方便、敏感检出颅内动脉瘤,采用追踪触发扫描技术有助于提高图像质量.     

颅内动脉瘤的MSCTA诊断

目的:探讨64层螺旋CT血管成像(64-MSCTA)对颅内动脉瘤的诊断价值。方法:搜集经DSA和手术证实的颅内动脉瘤18例,所有的病例均行64层螺旋CT血管成像。分别用最大密度投影(MIP)、容积再现(VR)、多平面重组(MPR)法进行图像重组。13例行手术治疗,5例行DSA检查。结果:18例患者中MSCTA发现动脉瘤17个,其中大脑中动脉7个,大脑前动脉6个,大脑后动脉2个,颈内动脉2个。1例左侧颈内动脉瘤MSCTA漏诊,经DSA检查发现。MSCTA上动脉瘤显示直径3～20mm。MSCTA所发现的17个动脉瘤与手术及DSA所见的动脉瘤位置、大小、形态基本一致。结论:MSCTA能清楚显示颅内动脉瘤的形态、位置及其与周围的解剖关系,为手术或介入治疗动脉瘤提供有价值的信息。     

16层螺旋CT血管造影在颅内病变中的应用

目的:探讨16层螺旋CT血管造影(CTA)对颅内疾病的应用价值。方法:应用16层螺旋CT对43例脑血管病变和颅内肿瘤患者行CTA检查,全部病例均采用多平面重建(MPR)、曲面重建(CPR)、表面遮盖显示(SSD)、最大密度投影(MIP)、三维容积重建(3D-VR)等技术显示脑血管,对脑血管显示情况进行评价,并将结果与DSA和/或手术结果比较。结果:43例患者CTA脑血管主干及1~3级分支血管显示率为100%;CTA检查未见异常4例,动脉瘤20例,血管畸形8例,缺血性脑血管病7例,脑肿瘤4例,其中21例行DSA检查,13例行手术治疗;与DSA比较,CTA对动脉瘤的敏感性为92%(12/13),CTA清晰地显示了瘤体、瘤颈、载瘤动脉及其详细关系,CTA显示的瘤体小于手术所见;CTA显示的畸形血管团大小、部位、供血动脉和引流静脉与DSA及手术所见相符;CTA显示脑血管狭窄、中断部位、形态与DSA一致;CTA显示了肿瘤与周围血管和颅骨间的三维关系。结论:16层螺旋CT血管造影对颅内各种血管性病变的诊断及显示血管与其他颅内病变的三维空间关系具有重要价值,是诊断颅内病变的重要而有效的检查方法。     

64层螺旋CT数字减影术对颅内动脉瘤诊断价值研究

目的 评价64层螺旋CT数字减影技术对颅内动脉瘤的诊断价值.方法 对36例蛛网膜下腔出血患者行64层螺旋CT平扫及增强扫描,每例患者均行常规CTA及减影CTA(digital subtraction CTA,DSCTA)重建,以DSA检查结果为标准,对比研究2种重建技术的图像质量、诊断准确性.结果 36例患者共计40个动脉瘤,经DSCTA检出动脉瘤40个,灵敏度、特异度分别为100%,经常规CTA检出动脉瘤37个,灵敏度、特异度分别为92.5%和100%.2组后处理图像质量单项有序行乘列表秩和检验有显著性差异(P＜0.01),DSCTA图像质量优于常规CTA.结论 64层螺旋CT DSCTA可作为筛查及诊断动脉瘤的首选方法.     

Detection and characterization of very small cerebral aneurysms by using 2D and 3D helical CT angiography

BACKGROUND AND PURPOSE: Many cases of subarachnoid hemorrhage are due to rupture of small cerebral aneurysms. Our purpose was to evaluate the usefulness of helical CT angiography (CTA) in the detection and characterization of very small (<5 mm) intracranial aneurysms. METHODS: One hundred eighty consecutive patients underwent CTA for suspected intracranial aneurysms. All aneurysms prospectively detected by CTA were confirmed by digital subtraction angiography (DSA) or at surgery. CT angiograms and digital subtraction angiograms were reviewed by two independent blinded radiologists who performed aneurysm detection, quantitation, and characterization using 2D multiplanar reformatted and 3D volume-rendering techniques. RESULTS: Fifty-one patients harboring 41 very small intracranial aneurysms were included in this series. Eighty-one percent (33 of 41 aneurysms) were 相似文献   

CTA对颅内微小动脉瘤的诊断价值并与DSA对照研究

目的：探讨16层螺旋CT血管成像和数字减影造影在颅内微小动脉瘤（VSD）诊断及治疗中的应用价值。方法：对843例原发性蛛网膜下腔出血的动脉瘤疑似患者行CTA和DSA检查。CTA后处理采用多平面重建（MPR）,最大密度投影（MIP）,容积再现（VR）。DSA常规摄正、侧位、双侧斜位片。结果：经手术及介入栓塞治疗证实39枚微小动脉瘤,CTA诊断36枚,DSA诊断35枚。减影后CTA与DSA比较,对瘤体直径≤3mm的VSA的判断,无明显统计学差异,敏感性为92.3%,特异性为85.7%,准确性为91.3%。结论：CTA诊断微小动脉瘤是一种可靠方法,在临床诊断上与DSA基本等同,在对临床治疗提供帮助上,CTA明显优于DSA。     

64层螺旋CT脑血管成像对颅内动脉瘤的临床诊断价值

目的:探讨64层螺旋CT脑血管成像(CTA)对颅内动脉瘤的临床诊断价值。方法:对55例临床怀疑颅内动脉瘤的蛛网膜下腔出血患者行64层螺旋CT脑血管成像检查,观察其原始图像及采用VR、MIP、MPR技术重建三维脑血管成像,部分病例同DSA或手术所见对照。结果:55名自发性蛛网膜下腔出血患者中,共检出动脉瘤患者47例,动脉硬化、狭窄3例,正常5例。CTA表现与手术结果、DSA基本一致。结论:64层螺旋CT脑血管成像能清晰的显示颅内动脉瘤的部位、大小、形态、瘤颈、与载瘤动脉及邻近血管及骨结构的关系,对颅内动脉瘤诊断敏感性及特异性较高,对绝大部分动脉瘤能迅速、准确地诊断,对临床治疗方案的制定有重要指导作用,并可作为术后复诊和随诊的重要手段。     

Detection of intracranial aneurysms: multi-detector row CT angiography compared with DSA

PURPOSE: To prospectively compare the effectiveness of multi-detector row computed tomographic (CT) angiography with that of conventional intraarterial digital subtraction angiography (DSA) used to detect intracranial aneurysms in patients with nontraumatic acute subarachnoid hemorrhage. MATERIALS AND METHODS: Thirty-five consecutive adult patients with acute subarachnoid hemorrhage were recruited into the institutional review board-approved study and gave informed consent. All patients underwent both multi-detector row CT angiography and DSA no more than 12 hours apart. CT angiography was performed with a multi-detector row scanner (four detector rows) by using collimation of 1.25 mm and pitch of 3. Images were interpreted at computer workstations in a blinded fashion. Two radiologists independently reviewed the CT images, and two other radiologists independently reviewed the DSA images. The presence and location of aneurysms were rated on a five-point scale for certainty. Sensitivity and specificity were calculated independently for image interpretation performed by the two CT image readers and the second DSA image reader by using the first DSA reader's interpretation as the reference standard. RESULTS: A total of 26 aneurysms were detected at DSA in 21 patients, and no aneurysms were detected in 14 patients. Sensitivity and specificity for CT angiography were, respectively, 90% and 93% for reader 1 and 81% and 93% for reader 2. The mean diameter of aneurysms detected on CT angiographic images was 4.4 mm, and the smallest aneurysm detected was 2.2 mm in diameter. Aneurysms that were missed at initial interpretation of CT angiographic images were identified at retrospective reading. CONCLUSION: Multi-detector row CT angiography has high sensitivity and specificity for detection of intracranial aneurysms, including small aneurysms, in patients with nontraumatic acute subarachnoid hemorrhage.     

Detection,characterization and endovascular therapy planning of intracranial aneurysms with 16-channel multidetector row CT angiography

Aim

To study the role of multidetector row CT angiography (MDCTA) in detection, characterization and endovascular therapy planning of intracranial aneurysms in comparison with digital subtraction angiography (DSA).

Material and methods

Between April 2011 and March 2012, prospective study of 43 patients with suspected cerebral aneurysms (27 females and 16 males) was done, their ages ranged from 40 to 74 years. Patients were referred to the Radiodiagnosis Department, from neurology and neuro-surgery departments for suspected cerebrovascular lesions. Aneurysm detection with multidetector CT angiography and DSA was analyzed.

Results

The MDCT angiograms were interpreted for the presence, location, size, ratios of the aneurysm (dome to neck ratio (D/N), aspect ratio), neck width, lobularity of the aneurysms and relationship of the aneurysm with the adjacent arterial branches, by using volume-rendering techniques.MDCT and DSA were done for all patients. Twenty-three patients had a single aneurysm, 4 had 2 aneurysms, 2 had 5 aneurysms and no aneurysms were detected in 14 patients presented with subarachnoid hemorrhage on unenhanced CT, the most common shape was saccular aneurysm (90%) and the most common size was medium size (43.9%). We determined the neck of 28 aneurysm (68%) and the remaining 13 could not be determined (32%).Among 41 cerebral aneurysms, 26 aneurysms were detected in anterior circulation (63.4%) and 15 in posterior circulation (36.5%). The middle cerebral artery (29.2%) was the most common site.In 55% of studied cases presented with aneurysmal rupture SAH was the commonest type of hemorrhage. According to Hunt and Hiss classification grades 2 and 3 were the most prevalent (17 patients and 6 patients respectively) followed by grade 4 (4 patients) and lastly grades 0 and 1 (one patient for each).

Conclusion

Sixteen channel Multidetector CT angiography offers high diagnostic accuracy nearly equivalent to that of DSA in the detection of intracranial aneurysms. However, 16 channel- MDCTA still has limited sensitivity in detecting aneurysms of 3 mm or less, despite its technical advances. MDCT can be used as a reliable alternative imaging technique to DSA in selected cases.