多层螺旋CT血管造影对颅内动脉瘤的诊断价值

目的:探讨多层螺旋CT血管造影(CTA)对颅内动脉瘤的诊断价值。方法:对36例蛛网膜下腔出血(SAH)的动脉瘤疑似患者均行多层螺旋CT血管造影检查和数字减影血管造影(DSA)检查,将两种检查结果进行对照分析、比较优缺点,CTA后处理采用容积再现(VRT)、最大密度投影(MIP)和表面覆盖法(SSD)。CTA重建采用0.75mm层厚、0.7mm层间隔,延迟扫描时间采用提前监控、静脉团注法。两位放射专家用盲法分析CTA、DSA资料,对颅内动脉瘤作出诊断。结果:36例SAH病例中,CTA发现32例37个动脉瘤,包括前交通动脉瘤15个、大脑前动脉瘤2个、后交通支9个、颈内动脉4个、大脑中动脉主干5个、基底动脉2个,其中1例CTA检查为颈内动脉海绵窦段动脉瘤,直径<3mm,DSA检查为阴性,其余均经DSA证实。4例SAH病例CTA、DSA检查均为阴性。CTA能够清晰显示瘤体、瘤颈、载瘤动脉及毗邻关系,其敏感性为94.5%。动脉瘤直径大于3.0mm者,CTA、DSA检查结果基本一致。CTA以VRT重建效果最佳。结论:CTA对于动脉瘤疑似患者是一种安全、无创伤的检查技术,能够精确显示动脉瘤的空间关系,可作为颅内动脉瘤首选的诊断方法。     

MSCT血管造影在颅内血管性疾病中的诊断价值

目的探讨16层螺旋CT血管造影(MSCTA)在颅内血管性疾病中的诊断价值。方法对339例患者行16排螺旋CT血管造影,同时采用容积重建(VR)、多平面重建(MPR)、最大密度投影(MIP)显示血管,其中45例动脉瘤、22例动静脉畸形、4例烟雾病和18例脑动脉狭窄随后进行了DSA检查或手术治疗。结果CTA诊断为动脉瘤的患者83例,动静脉畸形22例,静脉瘤2例,海绵状血管瘤3例,海绵窦动静脉瘘3例,单纯烟雾病3例,烟雾病合并动脉瘤1例,缺血性脑血管病22例,先天性变异等32例,正常病例186例,其中CTA诊断的45例动脉瘤、22例动静脉畸形、4例烟雾病和18例脑动脉狭窄与DSA检测结果及手术结果基本一致。结论MSCTA对头部血管性疾病的诊断,具有微创、快速、安全、准确性高的特点,可作为头部血管性疾病的首选影像学筛查。     

吲哚菁绿荧光血管造影技术对神经外科手术效果的影响

目的:研究在神经外科血管性疾病的手术中应用吲哚菁绿(ICG)荧光血管造影技术对手术效果的影响。方法:不同的神经外科血管性疾病患者47例,男性21例,女性26例;年龄16～73岁,平均57岁。在手术中进行ICG荧光造影,以进一步指导及评估手术效果。其中,颅内动脉瘤患者37例(后交通动脉瘤12例,前交通动脉瘤14例,大脑中动脉动脉瘤11例);颞浅动脉-大脑中动脉吻合术7例;脊髓动静脉瘘3例。上述患者均在术后行DSA血管造影或CTA以明确手术效果。结果:37例动脉瘤术中经ICG血管造影,发现动脉瘤颈夹闭后载瘤动脉狭窄3例,动脉瘤颈残留4例,远端分支狭窄2例,均根据术中吲哚菁绿血管造影情况重新调整瘤夹位置后,瘤颈夹闭满意,术后DSA血管造影及CTA显示载瘤动脉通畅,远端分支无狭窄,术后早期CT检查显示无脑梗死。7例颞浅动脉-大脑中动脉吻合术中行ICG造影见1例吻合口狭窄,予以拆除吻合线重新缝合,再次ICG造影显示吻合血管通畅。3例脊髓动静脉瘘切除病变前均可发现畸形血管轮廓、供血动脉、引流静脉情况,引导精准的切除动静脉瘘,术后血管造影显示3例畸形血管团均被彻底切除。结论:吲哚菁绿荧光血管造影可以准确判断动脉夹闭后瘤颈是否有残留、穿通动脉是否闭塞;可以及时发现血管吻合是否通畅;可以明确脊髓动静脉瘘的轮廓及其供血动脉、引流静脉;能显著提高上述血管性疾病的手术效果。     

大脑中动脉开窗的CT血管成像诊断

目的:探讨CT血管成像(CTA)在大脑中动脉开窗变异中的诊断价值,提高对该血管变异的认识。方法:搜集2008年1月-2012年2月的3778例患者的CTA资料,将所有原始图像经容积重建(VR)和最大密度投影(MIP)进行三维重建,分析大脑中动脉开窗影像学特点。结果:3778例中发现大脑中动脉开窗6例(男5例,女1例),检出率为0.16%。所有开窗均位于M1段,其中M1段近段5例(4例呈裂隙型,1例呈凸透镜型),中段1例呈凸透镜型。左、右大脑中动脉开窗各3例,且有1例同时合并基底动脉开窗。1例由1支桥血管与大脑中动脉和大脑前动脉近端围成,1例伴有早期颞极动脉的分支起源于开窗的下支血管。6例中1例同时合并左侧大脑中动脉瘤、前交通动脉瘤及基底动脉梭形动脉瘤;1例伴有动静脉畸形(AVM);1例伴有静脉畸形。结论:CTA能快速、直观地显示大脑中动脉开窗变异及其合并的血管性病变,可作为其诊断的首选方法。     

十六排螺旋CT血管造影对颅内病变的应用价值初探

目的：探讨十六排螺旋CT血管造影在颅内病变中的应用价值及其技术优势。材料和方法：采用GE公司的Lightspeed十六排螺旋CT对自发性脑内出血、动脉瘤、脑肿瘤等共76例病人行CTA检查，对血管显示情况进行评价。其中1例AVM和2例动脉瘤进行了DSA检查并与CTA结果比较，另外7例颅内及颜面部AVM及7例脑肿瘤病人与手术结果比较。结果：76例病人CTA检查结果如下：脑血管主干及其1～3级分支显示率为100％，大脑中动脉4～5级分支显示率为94．7％(72／76)。发现动脉瘤6例，清晰显示了瘤体、瘤颈、载瘤动脉及其详细关系；9例AVM，清楚地显示了AVM的畸形团及其供血动脉和引流静脉；7例脑肿瘤显示了肿瘤与周围血管、颅骨间的三维关系；Moyamoya病1例，清晰显示了基底节区的烟雾血管。结论：十六排螺旋CT血管造影重建图像质量明显提高，可显示更细小分支，对颅内各种血管性病变的诊断及显示血管与颅内其他病变三维空间关系具有重要价值，可作为动脉瘤等其他血管性病变筛选的首选方法。     

颅内动脉瘤320排CTA与DSA对照分析

目的 探讨320排CTA对颅内动脉瘤诊断的临床应用价值.方法 收集2010-04-2011-03期间行320排CTA和DSA检查的颅内动脉瘤患者33例.将CTA图像质量按颅底骨质残留及血管显示情况分为4个等级,再以DSA所见为对照,分析320排CTA诊断颅内动脉瘤的敏感性及粗符合率.结果 33例经320排CTA检出颅内动脉瘤30例33个、动静脉畸形(AVM)2例、颅内动脉瘤合并AVM 1例;经DSA证实有颅内动脉瘤30例33个、AVM 3例,其中动脉瘤"假阳性"1例;有22例行手术治疗.320排CTA诊断颅内动脉瘤敏感性为100%,粗符合率为97.0%.结论 与DSA比较,320排CTA诊断颅内动脉瘤有较高的敏感性及粗符合率,在术前筛查方面具有广泛的临床应用前景.     

64层螺旋CT血管造影在脑血管疾病中的应用

目的 探讨64层螺旋CT血管造影在脑血管疾病诊断中的应用价值.方法 53例脑血管病变患者行64层螺旋CT脑血管造影检查.先行平扫,后行CTA扫描,并用减影法进行后处理,重建得到VR、MIP、MPR及CPR图像,综合分析多种图像评价脑血管病变.结果 动脉瘤患者11例,其中颈内动脉至大脑中动脉瘤1例,颈内动脉瘤2例,大脑中动脉瘤2例,小脑上动脉瘤1例,后交通动脉瘤2例,前交通动脉瘤2例,基底动脉瘤1例,所有瘤体及瘤颈均得到清晰显示.动静脉畸形2例,均能显示畸形血管团,其中1例清晰显示供血动脉及引流静脉,另1例仅能显示引流静脉,供血动脉显示不清.脑血管狭窄或闭塞40例,均显示脑血管不同程度节段性、局限性狭窄或闭塞.结论 64层螺旋CT血管造影运用减影技术并综合多种重建方法能快速、准确诊断脑血管病变,有良好的临床应用价值.     

64排CT血管成像对自发性蛛网膜下腔出血病因的诊断价值

目的 :探讨64排CT血管成像在自发性蛛网膜下腔出血(subarachnoid hemorrhage,SAH)病因诊断中的价值。方法 :对81例临床怀疑SAH患者行CTA检查,所得原始图像由2位资深CT医师行VR、MIP、MPR等后处理,以明确病因。结果:CTA证实正常5例,动脉瘤69例,动静脉畸形7例。单个动脉瘤65例,2个动脉瘤4例。动脉瘤分布情况:前交通动脉13个,后交通动脉8个,椎-基底动脉9个,大脑前动脉9个,大脑中动脉21个,大脑后动脉4个,颈内动脉9个。囊状动脉瘤66个,梭形动脉瘤7个。大动脉瘤20个,中等动脉瘤24个,小动脉瘤29个。本组检出动脉瘤及动静脉畸形的敏感度为93.8%,特异度为98.8%。69例动脉瘤中,21例行栓塞术,48例行外科夹闭手术;7例动静脉畸形行手术切除。结论 :64排CT血管成像技术对SAH病因的诊断具有重要的应用价值。     

CTA减影在颅内动脉瘤诊断中的应用价值

目的:评价CT血管造影(CTA)减影术在颅内动脉瘤诊断中的应用价值。方法:采用CT血管造影检查拟诊颅内动脉瘤33例,图像分别运用A(经减影后)及B(常规)进行两次三维(3D)成像:最大密度投影(MIP)、表面遮盖成像(SSD)、容积重建(VR)。以手术或随访为标准评价两种检查结果;由两位有经验的神经外科医生、两位放射科医生双盲法评价图像质量。结果:A法检出动脉瘤36个(三例患者为多发动脉瘤),显示瘤体、瘤颈、载瘤动脉和周围血管的关系清晰、确切。B法检出动脉瘤31个,漏检1个大脑前动脉瘤2、个前交通动脉瘤、2个颈内动脉瘤。A法的检出率为100%,B法的检出率为86%。两者检出率经χ2检验有统计学意义。结论:CTA减影3D成像对颅内动脉瘤的诊断优于常规3D。     

64层螺旋CT头颈动脉联合成像诊断颅内动脉瘤的应用价值

 目的 评价64层螺旋CT诊断颅内动脉瘤的临床应用价值。方法 选取我院176例颅内动脉瘤患者的头颈CTA(computed tomographic angiography,CTA)检查资料,评价颅内动脉瘤的大小、形态、位置及术后情况。结果 176例均行数字减影血管造影(digital subtraction angiography,DSA)存在动脉瘤(157经手术治疗),共计 201个动脉瘤,其中19例为多发动脉瘤。首次CTA明确诊断动脉瘤171例(196个),漏诊5例,阳性诊断率97.5%(196/201)。171例(196个)中颈内动脉瘤112例,后交通动脉瘤10例,前交通动脉瘤26例,基底动脉瘤5例,大脑中动脉瘤13例,大脑前动脉瘤5例,对照DSA再次重组首次漏诊的5例CTA图像,又发现动脉瘤2例,阳性诊断率提高至98.5%。结论 应用多层螺旋CT头颈血管联合成像选择合理的后处理方法,有助于提高图像质量与诊断的准确性,对临床术前评估与术后评价有重要意义。     

Spiral CT angiography and surgical correlations in the evaluation of intracranial aneurysms

We investigated the accuracy of spiral computed tomography angiography (CTA) in the detection and study of intracranial aneurysms by comparing CTA with selective angiograms and surgical findings. Twenty-six patients (9 men and 17 women; mean age 53.1 ± 1.8 years) with suspected intracranial aneurysms were submitted to CTA (1- to 2-mm slices, pitch 1:1, 24 s, RI = 1) after a conventional CT examination showing subarachnoid hemorrhage (SAH) in 19 cases and during neuroradiological investigations performed for other reasons in 7 cases. One hundred twenty to 150 ml iodate contrast agent (0.3–0.4 gI/ml) were injected intravenously at 5 ml/s rate and with 12- to 25-s delay calculated with a preliminary test bolus. Three-dimensional shaded surface display (3D SSD) and maximum intensity projection (MIP) reconstructions were obtained from axial images. Then, within 48 h, all patients were submitted to digital subtraction angiography (DSA), with separate assessment of CTA and DSA findings. Twenty-two aneurysms shown by CTA were confirmed at DSA and surgery (true positives), whereas the vascular lesion was not confirmed at DSA in 2 cases (false positives). The presence of intracranial aneurysms was excluded at both CTA and subsequent DSA in 7 cases (true negatives) and there were no false negatives; sensitivity was 100 %, specificity 77.8 %, and diagnostic accuracy 93.5 %. Computed tomography angiography aneurysm location was confirmed at surgery in all cases, with very high accuracy in assessing the presence of an aneurysm neck (100 %). Computed tomography angiography accurately depicted the aneurysm shape in 20 of 22 cases, but failed to depict its multilobed nature in 2 cases. The mean aneurysm diameter calculated at CTA was 0.99 ± 0.12 cm vs 1.09 ± 0.11 cm at surgery (p < 0.01). The present results suggest that the high sensitivity of CTA, if confirmed by further studies, might help in avoiding having to resort to arteriography after negative CTA in SAH patients. Received 15 July 1997; Revision received 30 September 1997; Accepted 5 November 1997     

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   

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。     

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。     

颅内动脉CTA的前瞻性研究

目的：评价和研讨CTA对脑动脉的显示能力及扫描技术。材料和方法：脑MIP—CTA检查正常的患者50例。将CTA对颅内主要动脉的显示率与柳氏测得的MRA的类似数据进行比较。结果：对较粗大的动脉分支，CTA和MRA均显示良好。CTA对细小动脉分支的显示不及粗大动脉，差别较大。对前交通动脉的显示率，CTA明显高于MRA。CTA最佳延迟扫描时间的个体差异较大。结论：CTA能高质量地显示脑动脉，是评价脑血管状况，对脑血管疾病进行诊断和筛选的好方法。选择恰当的扫描参数很重要。CTA前有必要行小剂量试验。     

64层螺旋CT脑血管造影在颅内动脉瘤诊断中的应用

目的:与DSA相对照,探讨64层螺旋CT脑血管造影在颅内动脉瘤中的诊断价值。方法:对29例临床怀疑颅内动脉瘤的患者行64层螺旋CT脑血管造影(CTA)和DSA检查,使用GE64层Lightspeed VCT获得原始图像,所有病例均采用多层面重建(multiplanar reconstruction,MPR)、容积再现(volume rendering,VR)、薄层块最大密度投影(thin-slab maximumintensity projectjon,TS MIP)。后处理图像及DSA图像由2位放射科医生共同评估。结果:29例患者中,DSA证实25例共27个动脉瘤,其中2例为2个动脉瘤。与DSA结果相对照,CTA共检出25例26个动脉瘤,漏诊了1个颈出动脉瘤。CTA清晰显示了动脉瘤的形态、大小及载瘤动脉,3例动脉瘤瘤颈DSA未显示,CTA显示了全部动脉瘤的瘤颈。结论:64层CTA在颅内动脉瘤的诊断中具有极高价值,特别在显示动脉瘤瘤颈方面具有独特的优势,对临床治疗具有指导意义。     

CT angiography with three-dimensional techniques for the early diagnosis of intracranial aneurysms. Comparison with intra-arterial DSA and the surgical findings

INTRODUCTION: Cerebral CT angiography (CTA) is an established method applied to both the detection and treatment planning of intracranial aneurysms. The aim of our study was to compare CTA and digital subtraction angiography (DSA) findings with the surgical results mainly in patients with acute SAH and to evaluate the clinical usefulness of CTA. MATERIALS AND METHODS: During the last 2 years, 82 consecutive patients were admitted under clinical symptoms and signs suggestive of harboring an intracranial aneurysm. CT angiography performed immediately afterwards the plain CT, while DSA was performed within the first 48 h of admission. All aneurysms detected were confirmed during surgery or endovascular embolization. Repeat DSA was performed in all patients having both the initial CTA and the DSA 15 days after the onset of symptoms negative. CT angiograms and conventional angiographies were studied by a consensus of two radiologists for each technique, who performed aneurysm detection, morphological features characterization and evaluation of the technique. RESULTS: Surgical or/and endovascular treatment was performed in 45 patients and 53 aneurysms were confirmed. Using 3D-CT angiography, we detected 47 aneurysms in 42 patients. Conventional angiography depicted 43 aneurysms in 39 patients. The sensitivity of CTA for the detection of all aneurysms versus surgery was 88.7%, the specificity 100%, the positive predictive value (PPV) 100%, the negative predictive value (NPV) 80.7% and the accuracy 92.3%. Accordingly, the sensitivity of DSA was 87.8%, the specificity 98%, the PPV 97.7%, the NPV 89.1% and the accuracy 92.9%. Considering aneurysms > or =3 mm, CTA showed a sensitivity ranging from 93.3 to 100%, equal to that of DSA. CONCLUSION: Cerebral CT angiography has an equal sensitivity to DSA in the detection of intracranial aneurysms >3 mm. It has also 100% detection rate in AcoA and MCA bifurcation aneurysms, while some locations, like posterior communicating artery aneurysms, remain problematic. The delineating features of each aneurysm are better depicted with CTA due to 3D visualization. The use of digital subtraction angiography as a diagnostic tool can be limited in equivocal cases.     

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.     

Intracranial vascular stenosis and occlusive disease: evaluation with CT angiography, MR angiography, and digital subtraction angiography

BACKGROUND AND PURPOSE: Although digital subtraction angiography (DSA) provides excellent visualization of the intracranial vasculature, it has several limitations. Our purpose was to evaluate the ability of helical CT angiography (CTA) to help detect and quantify intracranial stenosis and occlusion compared with DSA and MR angiography (MRA). METHODS: Twenty-eight patients underwent CTA, DSA, and 3D time-of-flight (TOF) MRA for suspected cerebrovascular lesions. All three studies were performed within a 30-day period. Two readers blinded to prior estimated or calculated stenoses, patient history and clinical information examined 672 vessel segments. Lesions were categorized as normal (0-9%), mild (10-29%), moderate (30-69%), severe (70-99%), or occluded (no flow detected). DSA was the reference standard. Unblinded consensus readings were obtained for all discrepancies. RESULTS: A total of 115 diseased vessel segments were identified. After consensus interpretation, CTA revealed higher sensitivity than that of MRA for intracranial stenosis (98% versus 70%, P < .001) and occlusion (100% versus 87%, P = .02). CTA had a higher positive predictive value than that of MRA for both stenosis (93% versus 65%, P < .001) and occlusion (100% versus 59%, P < .001). CTA had a high interoperator reliability. In 6 of 28 patients (21%), all 6 with low-flow states in the posterior circulation, CTA was superior to DSA in detection of vessel patency. CONCLUSION: CTA has a higher sensitivity and positive predictive value than MRA and is recommended over TOF MRA for detection of intracranial stenosis and occlusion. CTA has a high interoperator reliability. CTA is superior to DSA in the evaluation of posterior circulation steno-occlusive disease when slow flow is present. CTA results had a significant effect on patient clinical management.     

减影CTA成像技术在脑动脉瘤诊断中的优势

目的合理应用64层螺旋CT减影CTA的优势,提高对脑动脉瘤的诊断率。资料与方法对61例临床有蛛网膜下腔出血的患者行CT检查,并用减影CTA和常规CTA进行对比,重组技术用最大密度投影(MIP)和容积再现(VR)。以手术及部分DSA为标准评价两种检查结果;由两名有经验的神经外科医师、两名放射科医师双盲法评价图像质量。结果减影CTA检出动脉瘤63个,检出动脉瘤的敏感性为100%、特异性为100%,阴性似然比为0.0000,评价者对动脉瘤检出的一致性为1.00;常规CTA检出动脉瘤60个,漏检3个颈内动脉床突下动脉瘤,检出动脉瘤的敏感性为95%,特异性为100%,阴性似然比为0.0500,评价者对动脉瘤检出的一致性为0.9565。结论减影CTA技术对颈内动脉床突下动脉瘤的检出具有明显的优势。