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1.
16层螺旋CT血管成像检查评价冠状动脉搭桥血管   总被引:7,自引:2,他引:5       下载免费PDF全文
目的探讨16层螺旋CT冠状动脉造影评价冠脉桥血管的价值。方法10例冠状动脉搭桥术后患者在心电门控技术下采用16层螺旋CT行冠状动脉造影扫描,将所得原始数据进行薄层重叠400ms R-R间期重建,重建图像系列调入3D任务卡内进行容积再现、最大密度投影、曲面重建和多平面重建等图像后处理,全面观察桥血管有无狭窄、钙化及吻合口情况。结果10例冠状动脉搭桥术的患者共有29条桥血管,其CT图像均能清晰显示,满足临床诊断要求,可用于影像学评价;4例桥血管有不同程度的钙化和狭窄变细,经DSA检查得到证实。结论16层螺旋CTA作为一种无创性的检查在冠状动脉桥血管随访的诊断和评价中是安全可靠的检查技术,有很高的临床价值。  相似文献   

2.
目的探讨多层螺旋CT血管成像(MSCTA)在烟雾病诊断中的价值以及应用前景。方法回顾性分析10例烟雾病患者的MSCTA及数字减影血管造影(DSA)的影像学资料。结果MSCTA可清晰显示狭窄、闭塞以及异常增多的脑血管。容积重建有利于显示病变血管与周围结构的空间关系,综合最大密度投影法重建和多曲面重建图像分析可清晰显示异常增多的脑血管,即烟雾状血管。MSCTA对狭窄及闭塞血管的检出率为66.2%(53/80);DSA对狭窄及闭塞血管的检出率为67.5%(54/80),两者比较差异无统计学意义(P〉0.05)。MSCTA对颅底异常血管网的显示及分布情况与DSA大致相似。结论MSCTA诊断烟雾病的灵敏度高,是早期诊断烟雾病的重要依据,早期诊断、及时治疗是改善烟雾病患者预后的有效方法。  相似文献   

3.
目的:探讨128层螺旋 CT 血管成像(MSCTA)对头颈部血管病变的临床诊断价值。方法选取我院接收的30例临床怀疑或确诊为头颈部血管病变患者作为本次的研究对象,30例患者均行128层螺旋 CT 血管造影检查,并采用多平面重建(MPR)、曲面重建(CPR)、容积重建(VR)、最大密度投影(MIP)显示血管,对128层螺旋 CT 血管成像在头颈部血管性病变中的应用价值进行评价。结果本组30例患者中8例患者行头颅 CTA 检查,其中6例患者为先天性血管发育异常,22例患者行头颈部 CTA 检查,其中14例患者发育异常,17例患者显示颈动脉系统粥样硬化。结论128层螺旋 CT 血管成像具有无创、准确性高、快速、安全性高等多种优点,在头颈部血管性病变的诊断中有较高的应用价值,可推广应用。  相似文献   

4.
目的研究多层螺旋CT血管造影(MSCTA)诊断脑动脉瘤的临床应用。方法选择我院2014年10月~2017年1月收治的60例蛛网膜下腔出血疑似脑动脉瘤患者进行的MSCTA检查的临床资料,其中15例行保守治疗;其余45例行MSCTA患者经过外科处理,包括41例经DSA血管内处理,4例经开颅手术治疗。分析CTA的诊断准确性、应用价值和作者的使用经验。结果CTA:所有患者中45例MSCTA诊断脑动脉瘤共47个,DSA及开颅术发现脑动脉瘤49个,诊断符合率为95.9%;CTA与DSA对瘤体长轴、瘤体短轴与瘤颈进行分析显示,两种检测方法的检测数据均无明显差异,P0.05。结论对于颅内动脉瘤患者采取MSCTA检测的临床意义重要,有利于显示出患者颅内动脉瘤的瘤体大小与瘤颈,诊断方法安全、可靠。  相似文献   

5.
CT三维血管造影诊断出血动脉瘤   总被引:2,自引:0,他引:2  
目的 评价CT血管造影(CTA)在颅内动脉瘤破裂后蛛网膜下腔出血诊断中的价值及手术指导意义。方法 对63例急性蛛网膜下腔出血病人急诊行螺旋CT扫描,然后行脑血管三维成像。结果 发现颅内动脉瘤24例。有1例阴性经全脑血管造影(DSA)发现存在动脉瘤。诊断均以手术证实。结论 CTA对动脉瘤蛛网膜下腔出血是一种微创、快速、准确的诊断技术,对于急诊或危重病人应为首选。  相似文献   

6.
目的 探讨数字化多层螺旋CT对骨关节创伤的应用价值. 方法 对66例骨关节创伤患者行64层螺旋CT扫描,并进行二维多平面重建;23例患者行三维容积再现,对3例疑血管病变的患者行64层螺旋CT血管成像检查,对不同重建方法进行分析.结果 64层螺旋CT扫描成像对骨关节创伤显示清楚,诊断正确率为100%,二维多平面重建有助于骨折细节和错位的显示及软组织损伤的显示,三维容积再现有助于骨折和局部复杂的解剖结构直观的立体显示. 结论 数字化多层螺旋CT有助于创伤的正确分型和临床治疗方案的选择,可以对骨关节创伤做出正确的术前诊断并评价其疗效.  相似文献   

7.
16层螺旋CT血管造影在下肢动脉疾病中的应用价值   总被引:1,自引:0,他引:1  
目的探讨16层螺旋CT血管造影技术(computed tomography angiography,CTA)在下肢动脉疾病中的临床应用价值。方法对103例临床疑有下肢动脉疾病者行CTA检查。扫描层厚5mm,螺距1.15mm,重建层厚1.0mm,重叠30%。造影剂剂量90~100ml,注射速率3ml/s,高压注射器自动触发扫描,扫描时间20~30s,对全部图像进行最大密度投影(maximum intensity projection,MIP)、容积再现技术(volume rendering technique,VRT)、多平面重建(multiplanar reformation,MPR)使下肢血管清晰显示,并对图像进行评价。结果103例血管重建图像显示良好。动脉闭塞64例,动脉狭窄32例,动脉瘤4例,3例未见异常。40例行手术治疗,术中所现与CTA结果完全一致。结论16层螺旋CT血管造影能清晰地显示下肢动脉及其病变,可以成为下肢动脉疾病术前评价和筛选的主要方法。  相似文献   

8.
目的探讨腹腔镜辅助下胃切除术前多层螺旋CT血管造影(MSCTA),评价胃周血管解剖中的价值。方法30例拟行腹腔镜辅助下胃远端切除术的患者行多层螺旋CT双期扫描,其动、静脉期图像采用容积再现重建技术分别行三维CT血管造影(CTA)。3位观察者根据其CT血管成像表现,评价胃左动脉、胃右动脉、替代肝左动脉以及胃左静脉解剖,其结果与手术对照。结果三维CTA准确显示胃左动脉30例、胃右动脉29例,胃左静脉30例。1例胃右动脉CTA未能发现,但术中发现其管径细小。6例患者CTA发现伴有替代肝左动脉。根据三维CTA制定手术方案,所有30例患者腹腔镜辅助下胃远端切除术均获得成功。以手术结果为对照,CTA显示胃左动脉、胃左静脉和替代肝左动脉敏感性和阳性预测值均为100%;显示胃右动脉敏感性为100%,阳性预测值为96%。结论MSCTA能够准确评价胃的血管解剖,有利于安全快速进行腹腔镜辅助下胃远端切除术。  相似文献   

9.
目的探讨多排螺旋CT三维血管成像(MSCTA)在自发性蛛网膜下腔出血(SAH)超急性期诊疗中的作用、评价MSCTA在SAH患者病因诊断学中的价值。方法回顾分析经CT平扫及腰穿明确诊断的自发性蛛网膜下腔出血48例患者,在超急性期(24h内)行多排螺旋CT血管造影检查,并与DSA全脑动脉造影检查比较。结果48例患者中MSCTA发现动脉瘤34例,显示瘤体、瘤颈、载瘤动脉和与周围血管及颅骨的关系清晰、确切;动静脉畸型(AVM)7例,显示畸形血管团的部位、大小、供血动脉来源,引流静脉的分支情况,空间立体结构清晰。颈内动脉海绵窦瘘(ICCF)1例,显示扩张的海绵窦大小、形态、范围及纡曲的引流静脉,可显示ICCF的瘘口;静脉性血管畸形(CVM)3例;不明原因3例。对脑血管病的检出敏感性为95%,特异性为100%。结论MSCTA是简单、快速、无创、安全、可靠的脑血管成像技术,在一定程度上可替代DSA检查,可作为sAH超急性期患者病因诊断的首选检查方法。  相似文献   

10.
目的探讨三维数字减影血管造影(three dimensional digital subtraction angiography,3D DSA)血管虚拟内镜成像在颅内动脉瘤诊治中的作用。方法回顾性分析53例颅内动脉瘤三维DSA血管虚拟内镜成像资料并应用三维DSA血管虚拟内镜成像随访术后载瘤血管及瘤颈残留情况。三维的旋转数字图像由脑血管造影机球管和影像增强器的同步2次240°旋转获得,应用Volume Viewer软件对原始三维图像进行重建,固定密度值并选取感兴趣区,用Navigator软件进行血管虚拟内镜成像,观察血管腔内结构。结果 53例术前三维DSA血管虚拟内镜成像清晰,共检出动脉瘤62个,其中动脉瘤体有穿支血管发出19例(15例手术证实),动脉瘤内有血栓形成7例(4例手术证实),载瘤动脉内有动脉粥样硬化斑块5例(3例手术证实)。术后31例3D DSA随访:28例未见瘤颈残留,2例出现载瘤动脉轻度狭窄;2例弹簧圈突入载瘤动脉血管腔内;1例动脉瘤栓塞后瘤颈复发残留,再次开颅夹闭动脉瘤。结论三维DSA血管虚拟内镜成像是一种安全有效的评估颅内动脉瘤管腔结构的方法,不仅可以用于动脉瘤的术前判断,指导手术方式的选择,也可以用于动脉瘤术后的随访,为明确术后载瘤动脉及瘤颈情况提供依据。  相似文献   

11.
The goal of this study was to assess the diagnostic accuracy of 16-row multislice computed tomography angiography (CTA) compared with digital subtraction angiography (DSA) in the detection of aneurysm remnants and arterial patency after clipping of intracranial aneurysms. Thirty-seven consecutive patients with 40 clipped aneurysms (39 of which had ruptured) were studied with the aid of postoperative CTA and DSA. CTA was performed with a 16-row multislice CT scanner by using collimation of 0.75 mm. Two neuroradiologists evaluated the image quality of CTA and the presence of the residual aneurysms with a 5-point rating scale. DSA was considered a reference standard. Two aneurysms with incomplete closure were identified by the 16-slice CTA reconstructions. With 16-slice CTA, there were no false-positive results of an aneurysm with incomplete closure in any patient. Arterial patency could be reliably evaluated close to the clip. The sensitivity, specificity, and accuracy of 16-slice CTA for aneurysm occlusion and arterial patency were 100%[97.5% confidence interval (CI): 15.8 - 100%], 100% (97.5% CI: 90.7 - 100%) and 100% (97.5% CI: 91.2 - 100%), respectively. The positive and negative predictive values were 100 and 100%, respectively. The mean duration of the examination was 12 min for CTA and 40 min for DSA (p < 0.05). Sixteen-slice CTA was highly cost effective (p < 0.05). Sixteen-slice CTA is a valuable non-invasive diagnostic modality for the assessment of aneurysm remnants and arterial patency in patients after aneurysm clipping. Its high sensitivity and low cost warrant its use for postoperative routine control examinations following clip placement on an aneurysm.  相似文献   

12.
Objective: The aim of the present study was to review the efficacy of 16‐row multislice computerized tomography angiography (CTA) in ruptured cerebral aneurysm surgery by comparison with conventional digital subtraction angiography (DSA). Methods: A systemic review of patients suffering from ruptured cerebral aneurysm was performed. We report the results obtained during the 19‐month period from April 2003 to October 2004. In total, 32 patients had undergone aneurysm surgeries, in which 11 patients had both DSA and CTA performed. Results: Among the 11 patients with both DSA and CTA performed, two aneurysms were missed in DSA in two patients. The sensitivity and specificity of CTA were 100%. The correlation of CTA with DSA in operative findings was 100%. Our CTA could detect the aneurysm size down to 2 mm in diameter. Conclusion: The diagnostic accuracy of 16‐row multislice CTA is promising and it compares well with DSA for detection and evaluation of ruptured cerebral aneurysms. It is safe and effective to establish treatment decision on the basis of CTA alone in the majority of cases.  相似文献   

13.
多层螺旋CT血管造影术在肝动脉解剖变异分析中的应用   总被引:4,自引:1,他引:3  
目的探讨16层螺旋CTA在分析肝动脉的解剖变异中的应用价值。方法分析240例肝动脉的CTA,并与DSA(26例)或手术(19例)结果进行对照。所有病例均在Toshiba Aquilion 16层螺旋CT机上进行。动脉期层厚为1mm,重建层厚为0.8 mm,螺距15,延迟时间25 s,对比剂用量为1.5 ml/kg。依据Michels分型对240例CTA进行分类,并记录CTA对不同管径动脉分支的显示率。结果正常肝动脉解剖占74.6%,变异占25.4%。45例有DSA或手术结果者,CTA的诊断符合率为95.6%。结论16层CT容积重建在显示肝动脉解剖及变异方面有较高的符合率,可应用于介入、手术以及肝移植术前的评价。  相似文献   

14.
Chen W  Yang Y  Xing W  Qiu J  Peng Y 《Journal of neurosurgery》2008,108(6):1184-1191
OBJECT: The goal of this study was to prospectively compare the effectiveness of 16-slice computed tomography (CT) angiography with that of conventional digital subtraction (DS) angiography and the surgical findings used to detect and characterize intracranial aneurysms. METHODS: Two hundred forty-four consecutive patients underwent both CT angiography and DS angiography no more than 3 days apart. Computed tomography angiography was performed with a 16-row multislice CT scanner in which a collimation of 0.75 mm was used. Two observers independently reviewed the CT images, and 1 of the 3 attending neuroradiologists reviewed the DS angiograms. They determined the presence, location, quantitation, and characterization of the intracranial aneurysms. Statistical results were calculated independently for the image interpretation performed by the 2 CT scan readers and the DS angiogram reader by using the combination of DS angiography or intraoperative findings or both as a reference standard. RESULTS: One hundred thirty-six patients harboring 153 intracranial aneurysms were included in this series. There was no statistically significant difference in sensitivity between 16-slice CT angiography and conventional DS angiography (p > 0.05). The sensitivities of 16-slice CT angiography for aneurysms < 5 mm, 5-10 mm, and > 10 mm were 94.8, 100, and 100%, respectively, on a per-aneurysm basis. The overall sensitivity and specificity of CT angiography for aneurysms were 98.0 and 99.1%, respectively. Sixteen-slice CT angiograms were clearer and more accurate in depicting the relationship of aneurysms to bone structures and adjacent branch vessels. CONCLUSIONS: Computed tomography angiography using a 16-slice scanner is an accurate tool for detecting and characterizing intracranial aneurysms, including small aneurysms. Noninvasive 16-slice CT angiography will become a viable replacement for conventional DS angiography in the diagnosis and characterization of aneurysms.  相似文献   

15.
Spontaneous subarachnoid haemorrhage is a clinical condition that may be attributed to various underlying causes, such as rupture of intracranial aneurysms and arteriovenous malformations (AVMs). Suspected cerebrovascular abnormalities can be detected either with digital subtraction angiography (DSA) or with computed tomography angiography (CTA) combined with postprocessing tools, namely multiplanar reformation, maximum intensity projection, shaded surface display, virtual endoscopy and direct volume rendering. We prospectively studied a group of 205 patients with spontaneous subarachnoid haemorrhage. One-hundred-ninety-eight patients underwent both DSA and CTA, and formed our study group. Patients with intracranial aneurysms underwent surgical or endovascualar treatment. DSA was negative for 35 patients, detected 178/179 aneurysms and 15 AVMs. CTA correctly detected 176/179 aneurysms and all 15 cases of AVMs, whereas it was negative in 35 cases. After 3D reconstruction the size, location and the relationship to the parent vessel of the aneurysms, the extent of the AVMs with the main feeding vessel(s), nidus and draining veins were reliably shown by CTA, although DSA provided more anatomic details related to the anatomy of the adjacent vessels. The accuracy, sensitivity, positive predictive accuracy and negative predictive accuracy for CTA was 98, 97.9, 100 and 94.3% and for DSA was 99, 99.3, 100 and 98%, respectively. It is suggested that CTA is a reliable alternative to DSA in detecting intracranial aneurysms. The role of CTA in demonstrating AVMs can be considered complementary to that of DSA.  相似文献   

16.
Summary ? Background. There has been no detailed documentation of the advantages of three-dimensional (3D) wall imaging of cerebral aneurysms. The usefulness of such endoscopic images obtained with modified spiral computed tomography angiography (CTA) was therefore examined in comparison with conventional spiral CTA and digital subtraction angiography (DSA).  Methods. Fifteen of 45 patients who underwent conventional spiral CTA in our department in the past 4 years, were further studied with a technical modification of surface-rendering reconstruction in spiral CT. Endoscopic images were obtained by regulating the lower and higher thresholds of spiral CT scans in processing. Digital subtraction angiography was also performed for 14 of the 15 patients. The 3D wall images of the cerebral aneurysms were assessed in comparison with findings from conventional CTA and DSA.  Findings. The true orifice of the aneurysms could be visualized with the endoscopic mode in all of the 15 cases. In paraclinoid aneurysms, particularly below the anterior clinoid process, the relationships to associated vessels and bone structures were more clearly disclosed with this mode. The endoscopic images of aneurysms with rigid clots or neighboring distended veins were not as adversely affected as conventional CTA. In 4 of the 15 the wall imaging precisely located the branches arising from the dome of aneurysms which DSA could not.  Interpretation. Wall imaging of complex or small cerebral aneurysms provided valuable information on their relationships to associated arteries and surrounding bony structures. The endoscopic mode, a simple modification of surface rendering, is easily available in commercial CT processing packages.  相似文献   

17.
The purpose of this study was to evaluate the potential of high quality computed tomographic angiography (CTA) to replace digital subtraction angiography (DSA) in cases of ruptured saccular aneurysms and perform early surgical clipping or coiling on the basis of CTA alone. In a prospective study, 100 patients with aneurysmal subarachnoid haemorrhage (SAH) diagnosed by computed tomography underwent CTA. CTA revealed a total of 118 aneurysms including all ruptured aneurysms. A decision of direct surgical clipping, endovascular coiling or therapeutic abstention was made in 89 cases (89%) on the basis of CTA alone. Sixty-one direct surgical procedures were performed after CTA. Twenty-six cases underwent DSA for immediate endovascular treatment of the ruptured aneurysm. In 11 cases (11%), a DSA was performed prior to the therapeutic decision because of unclear aneurysm. Four cases were not treated because of initial poor clinical grade. The surgical findings were compared with CTA data and were considered accurate in all but one case. All patients underwent postoperative DSA within 10 days after SAH. The sensitivity and the specificity of CTA for the detection of all aneurysms, as compared with postoperative DSA, were 95.1 and 100%, respectively. A total of six unruptured aneurysms were missed initially, but were visible retrospectively on CTA in all but one case and were found in patients with multiple aneurysms in whom the ruptured aneurysm was detected by CTA. Current quality CTA allows reliable pretreatment planning for the majority of cases of aneurysmal subarachnoid haemorrhage and diminishes the pretreatment evaluation time critically. Complementary pretreatment DSA is required in situations where CTA characteristics of the ruptured aneurysm is unsatisfactory.  相似文献   

18.
Digital subtraction angiography (DSA) has been used as the standard method for detecting cerebral vasospasm after subarachnoid hemorrhage (SAH). Multislice computed tomographic angiography (CTA) is a relatively recent method used for evaluating the vasculature of the intracranial arteries. The purpose of this study was to compare multislice CTA and DSA for the detection and quantification of cerebral vasospasm after SAH, and to analyze the usefulness of multislice CTA. Eight patients with SAH underwent initial CTA with DSA within 72 hours after the onset of symptoms and follow-up multislice CTA and DSA 8 to 48 days after SAH. Five arterial locations were established in the A1 and A2 segments of the anterior cerebral artery, the M1 and M2 segments of the middle cerebral artery and the posterior cerebral artery (PCA) on both multislice CTA and DSA images. Vasospasm was classified as none, mild (up to 30% reduction in luminal diameter), moderate (31-60% reduction), and marked (at least 60% reduction) using the scale of Schneck and Kricheff. The multislice CT system used the following parameters: 1.25 mm collimation and 3.75 pitch with a 4-channel system. The degree of vasospasm revealed by the multislice CTA was significantly correlated with the degree of vasospasm revealed by DSA. In general, most discrepancies between CTA and DSA were in the detection of mild and moderate vasospasm. We found that the consistency between multislice CTA and DSA was greater for mild (100%, n=3) or moderate (100%, n=3) vasospasm than none (n=1) or marked vasospasm (n=1). However, it was unclear whether multislice CTA was more specific for a proximal location (A1, M1, PCA) or distal location (A2, M2) for evaluation of cerebral arteries. Multislice CTA can detect angiographic vasospasm after SAH with an accuracy similar to that of DSA. Multislice CTA is highly sensitive, specific and accurate in detecting mild and moderate cerebral vasospasm. It is less accurate for detecting no vasospasm and marked vasospasm. Therefore, the authors propose that multislice CTA be considered as a useful tool for the detection and management of intracranial vasospasm after SAH.  相似文献   

19.
Chappell ET  Moure FC  Good MC 《Neurosurgery》2003,52(3):624-31; discussion 630-1
OBJECTIVE: To compare a novel diagnostic radiological technique, computed tomographic angiography (CTA), with the standard method, namely digital subtraction angiography (DSA), in the diagnosis of cerebral aneurysms. METHODS: A comprehensive search of the world literature on CTA was performed. Articles that reported on prospective comparisons of CTA and DSA in the evaluation of patients suspected of harboring cerebral aneurysms were selected for data extraction. Suitable statistical methods were applied to the extracted data for meta-analysis. RESULTS: Twenty-one references met the criteria for use in the meta-analysis. Unweighted calculations based on data for 1251 patients resulted in a sensitivity of 0.933 (93.3%; range, 75.4-100%) and a specificity of 0.878 (87.8%; range, 0-100%). When the studies were weighted for the number of patients in each study, the sensitivity decreased slightly, to 0.927 (92.7%), and the specificity decreased more substantially, to 0.772 (77.2%). CONCLUSION: On the basis of this meta-analysis, DSA remains the standard method. However, many who use CTA have reported it to be as good as or better than DSA in the diagnosis and treatment of cerebral aneurysms, as well as being of less risk and discomfort to their patients and easier and less expensive to perform.  相似文献   

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