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1.
目的:通过分析脑动静脉畸形和海绵状血管瘤的的3D-TOF MRA及SWI磁共振表现,探讨3D-TOF MRA及SWI对脑血管畸形的诊断价值。方法:对我院收治的44例血管畸形进行高场磁共振成像,并加扫3D-TOF MRA及SWI序列,其中26例海绵状血管瘤、18例动静脉畸形。通过分析SW I和3D-TOF-MRA技术对脑血管畸形的显示情况,比较二者对脑血管畸形的检出率以及细微特征的鉴别能力等。结果:3D-TOF MRA可以清晰显示动静脉畸形的部位、大小、输入动脉的来源、输出静脉的去向等;海绵状血管瘤MRA检查均未见异常供血动脉,病灶内无异常流空信号。SWI可清晰显示海绵状血管瘤,病灶的数目及范围较常规序列增大;SWI只能显示动静脉畸形迂曲的小静脉,但不能直观显示畸形血管团的全貌及输入动脉等粗大血管的情况。结论:3D-TOF MRA技术对于AVM之类高流速低阻力的血管畸形的显示具有独特的价值,而SWI技术则对于海绵状血管瘤等小血管或低流速的血管畸形的显示具有明显的优势。  相似文献   

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目的探讨磁敏感加权成像(SWI)序列在诊断脑部疾病中的临床应用价值。方法回顾性分析45例经临床随访、数字减影血管造影(DSA)或手术病理证实的脑部疾病患者的磁共振成像(MRI)资料。MRI检查包括T1WI、T2WI、T2-磁共振成像液体衰减反转恢复序列(FLAIR)、SWI。分析各种疾病的影像学表现,评价SWI在诊断脑部疾病中的优劣。结果海绵状血管瘤19例,SWI检出19例,检出率100%;T1WI序列检出8例,检出率42%。动静脉畸形出血12例,SWI序列、T2-FLAIR及T2WI序列检出12例,检出率均为100%,T1WI序列检出10例,检出率83%,SWI与其他序列对比无明显差别。静脉窦血栓检出3例,SWI除检出静脉窦血栓外,还可以显示周围引流静脉。急性脑梗死6例,其中3例SWI显示有出血,常规T1WI检查序列仅1例显示。脑肿瘤5例,其中3例SWI较T1WI、T2WI更好地显示其内出血和周围引流静脉。结论SWI能够清晰显示血流缓慢的静脉血管及微小出血灶,在显示病灶的内部结构方面也有独特的优势,能发现常规MRI不能显示的信息。  相似文献   

3.
磁敏感加权成像在脑血管畸形疾病中的应用   总被引:5,自引:0,他引:5  
目的 评价磁敏感加权成像在诊断脑血管畸形性疾病中的应用价值.方法 58例脑血管畸形(海绵状血管瘤、动静脉血管畸形及静脉血管畸形)患者行1.5T MRI检查,包括SE序列,SWI序列,部分还包括MRI增强、DWI、T2*WI、MRA和MRV.SWI所得到图像资料经过工作站进行后处理,获得SWI磁化率加权图、SWI MinIP图和SWI相位图.将所有资料进行对比分析,比较SWI相对于常规序列在脑血管畸形疾病中的诊断价值.结果 30例海绵状血管瘤患者SWI的磁化率加权图像特点表现为完全低信号6个,另24个表现为低信号中伴点状、斑状等或高信号,周围环绕较宽低信号,出现明显的"铁环征".病变范围的显示较常规序列范围大.在14例动静脉血管畸形中,SWI较常规序列多发现7例动静脉血管畸形(AVM),有10例同时显示供血动脉及引流静脉.在14例静脉血管畸形中,SWI较常规序列多发现病变8处,并能同时显示更多细小髓静脉及引流静脉.结论 SWI能够较常规扫描序列更好的对脑血管畸形,尤其是不典型的海绵状血管瘤做出诊断.  相似文献   

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目的探讨磁敏感加权成像(SWI)在常见脑血管性疾病中的应用价值。资料与方法回顾性分析经临床随访及数字减影血管造影(DSA)证实的26例脑血管疾病患者的MRI资料,与常规T1WI、T2WI、T2-FLAIR序列进行比较,分析各种脑血管性疾病在SWI上的影像学表现,评价SWI在诊断脑血管性疾病中的优势。结果海绵状血管瘤8例,常规MRI检出病灶11处,SWI共发现病灶37处,病灶在SWI图上以低信号为主,部分病灶内可见点状高信号;动静脉畸形2例,SWI对动静脉畸形的血管团及引流静脉能够清晰显示,但对其供血动脉显示欠佳;静脉畸形3例,常规MRI仅显示较粗大的流空血管,SWI清晰显示周围小畸形血管。脑梗死10例,SWI显示2例急性期脑梗死灶内的微小出血灶,常规MRI无异常发现。脑血管淀粉样变性3例,SWI对其引起的微小出血灶及血肿能清晰显示。结论 SWI能够清晰显示低血流量畸形血管及微小出血灶,为MRI诊断脑血管疾病提供更加详细、准确的信息。  相似文献   

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目的:探讨磁敏感加权成像(SWI)技术在脑静脉性血管畸形中的诊断价值。方法:对18例静脉性血管畸形患者的影像资料进行回顾性分析。18例患者均进行了常规MRI平扫及SWI检查.其中6例同时行MRGd—DTPA增强扫描,5例行CT平扫。结果:MRI平扫部分(14/18例)可显示扩张的引流静脉及髓静脉;而SWI可显示全部的引流静脉及扩张的髓静脉,呈典型“水母头”样改变.4例同时显示了静脉畸形同一部位伴发的海绵状血管瘤。结论:SWI无需注射对比剂,能够清晰地显示静脉畸形以及伴发的隐匿性血管畸形,可以作为脑静脉性血管畸形首选的检查方法。  相似文献   

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目的:探讨磁敏感加权成像在脊髓出血性病变中的应用价值。方法:32例脊髓出血性病变患者(病变组)和16例健康志愿者(对照组)行3.0T磁敏感加权成像(SWI)、二维扰相梯度回波T2*加权(2D-MERGE T2*WI)、FSE T1WI及FSE T2WI扫描。32例病例均经临床随访及病理证实,包括脊髓挫裂伤20例、脊髓动静脉畸形6例、脊髓海绵状血管瘤2例、脊髓星形细胞瘤伴出血4例。比较分析SWI及2D-MERGE T2*WI、常规FSE T2WI对脊髓出血性病变检出的敏感度和特异度。结果:20例脊髓挫裂伤患者常规FSE T2WI均显示水肿征象,其中4例脊髓挫裂伤在SWI、2D-MERGET2*WI、常规FSE T1WI及FSE T2WI均未见出血征象,8例脊髓挫裂伤仅在SWI显示出血征象,另外8例脊髓挫裂伤、6例脊髓动静脉畸形、2例脊髓海绵状血管瘤和4例脊髓星形细胞瘤伴出血在SWI显示低信号出血征象较2D-MERGET2*WI及常规FSE T2WI更敏感。结论:3.0T磁敏感加权成像检出脊髓出血性病变比常规MRI更敏感,可作为脊髓出血性病变MRI检查重要的补充序列。  相似文献   

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目的:探讨磁敏感加权成像在脊髓出血性病变中的应用价值.方法:32例脊髓出血性病变患者(病变组)和16例健康志愿者(对照组)行3.0T磁敏感加权成像(SWI)、二维扰相梯度回波T2*加权(2D-MERGE T2*WI)、FSE T1WI及FSE T2WI扫描.32例病例均经临床随访及病理证实,包括脊髓挫裂伤20例、脊髓动静脉畸形6例、脊髓海绵状血管瘤2例、脊髓星形细胞瘤伴出血4例.比较分析SWI及2D-MERGE T2*WI、常规FSE T2WI对脊髓出血性病变检出的敏感度和特异度.结果:20例脊髓挫裂伤患者常规FSE T2WI均显示水肿征象,其中4例脊髓挫裂伤在SWI、2D-MERGE T2*WI、常规FSE T1 WI及FSE T2WI均未见出血征象,8例脊髓挫裂伤仅在SWI显示出血征象,另外8例脊髓挫裂伤、6例脊髓动静脉畸形、2例脊髓海绵状血管瘤和4例脊髓星形细胞瘤伴出血在SWI显示低信号出血征象较2D-MERGET2*WI及常规FSE T2WI更敏感.结论:3.0T磁敏感加权成像检出脊髓出血性病变比常规MRI更敏感.可作为脊髓出血性病变MRI检查重要的补充序列.  相似文献   

8.
磁敏感成像诊断脑血管畸形   总被引:2,自引:0,他引:2       下载免费PDF全文
朱丽丽  杨春  李绍东  徐凯   《放射学实践》2010,25(2):146-149
目的:探讨磁敏感成像对海绵状血管瘤和静脉畸形等脑血管畸形的诊断价值。方法:回顾分析23例经手术病理证实的海绵状血管瘤和静脉畸形患者的磁敏感成像后处理图像及常规T1 WI、T2WI及增强T1WI图像。结果:23例脑血管畸形中海绵状血管瘤18例、静脉畸形5例。常规MRI和磁敏感成像均显示18例海绵状血管瘤的出血灶,磁敏感成像上14例呈“铁环”征,常规MRI仅9例见此征象,磁敏感成像显示出血范围较常规MRI大;5例静脉畸形磁敏感成像均显示引流静脉及髓静脉呈条状低信号,髓静脉呈特征性的“海蛇头”状分布,常规MRI仅2例显示此征。结论:磁敏感成像能敏感地显示出血、微出血及细小静脉,与常规MRI结合可显著提高海绵状血管瘤和静脉畸形的检出率。  相似文献   

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目的:探讨高分辨磁敏感成像(HR-SWI)在脑部血管畸形中的应用价值。方法:对45例脑血管畸形的患者行常规MR序列和HRSWI扫描。其中8例同时行MRA检查,31例行增强检查。结果:45例患者均在HR-SWI上清晰显示畸形血管,其中海绵状血管瘤26例,动静脉畸形5例,静脉瘤11例,Sturge-Weber综合征3例。结论:SWI显示血管畸形更清晰,明显优于常规序列,可为临床提供更多有用的信息并有助于脑血管畸形的确诊。  相似文献   

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目的 探讨CT、MRI检查在脑血管畸形诊断中的价值.方法 回顾性分析25例经临床或病理诊断的脑血管畸形CT和MRI资料,比较CT和常规MRI序列(T1 WI、T2 WI、FLAIR)、MRA及MRI磁敏感加权成像(susceptibility weighted imaging,SWI)的影像表现、检出率,判断其诊断价值.结果 25例病例中动静脉畸形16例、海绵状血管瘤7例和静脉畸形2例.16例动静脉畸形中3例CT平扫未见异常,13例CT平扫表现为边界不清的混杂密度影和迂曲扩张的血管影.而常规MRI和MRA上均可见扩张迂曲的异常血管团影.在SWI上均可见斑点状、迂曲的条状低信号影.7例海绵状血管瘤4例为单发,3例为多发,共检出病灶73个.CT平扫检出5例19个病灶.常规MRI检出51个病灶,“桑椹”状高低混杂信号及“铁环征”较具有特征性.在SWI像上检出病灶73个,其中69个为低信号,4个为以低信号为主的混杂信号.2例静脉畸形均为单发,CT平扫、常规MRI检查均无特异性表现,SWI表现为放射状异常信号影聚集,呈“水母头”征.结论 CT检查对合并急性出血、钙化的病灶敏感,但对无出血、无钙化及微出血的小病灶检出率低,定性困难.MRI常规序列结合SWI序列扫描能提供更多、更准确的信息,为诊断脑血管畸形的最佳检查方法.  相似文献   

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The Knee injury and Osteoarthritis Outcome Score (KOOS) is a self-administered instrument measuring outcome after knee injury at impairment, disability, and handicap level in five subscales. Reliability, validity, and responsiveness of a Swedish version was assessed in 142 patients who underwent arthroscopy because of injury to the menisci, anterior cruciate ligament, or cartilage of the knee. The clinimetric properties were found to be good and comparable to the American version of the KOOS. Comparison to the Short Form-36 and the Lysholm knee scoring scale revealed expected correlations and construct validity. Item by item, symptoms and functional limitations were compared between diagnostic groups. High responsiveness was found three months after arthroscopic partial meniscectomy for all subscales but Activities of Daily Living.  相似文献   

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Objective To investigate endovascular treatment of traumatic direct carotid-cavernous fistulas (CCF) and their complications such as pseudoaneurysms. Methods: Over a five-year period, 22 patients with traumatic direct CCFs were treated endovascularly in our institution. Thirteen patients were treated once with the result of CCF occluded, 8 twice and 1 three times. Treatment modalities included balloon occlusion of the CCF, sacrifice of the ipsilateral internal carotid artery with detachable balloon, coll embolization of the cavernous sinus and secondary pseudoaneurysms, and covered-stem management of the pseudoaneurysms. Results All the direct CCFs were successfully managed endovascularly. Four patients developed a pseudoaneurysm after the occlusion of the CCF with an incidence of pseudoaneurysm formation of 18.2% (4/22). A total number of 8 patients experienced permanent occlusion of the ICA with a rate of ICA occlusion reaching 36.4% (8/22). Followed up through telephone consultation from 6 months to 5 years, all did well with no recurrence of CCF symptoms and signs. Conclusion Traumatic direct CCFs can be successfully managed with endovascular means. The pseudoaneurysms secondary to the occlusion of the CCFs can be occluded with stent-assisted coiling and implantation of covered stents.  相似文献   

15.
Introduction Ankle sprains are the most common musculo-skeletal injury that occurs in athletes,particularly in sports that require jumping and landing on one foot such as soccer,and basketball(1-4).These injuries often result in significant time loss from participation,long-term disability,and have a major impact on health care costs and resources(5-8).  相似文献   

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Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.  相似文献   

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Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to  相似文献   

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KEY POINTS ·High-intensity interval training(HIT)is characterized by repeated sessions of relatively brief,intermittent exercise.often performed with an“a11 out”effort or at an intensity close to that which elicits peak oxygen uptake(i.e.,≥90%of VO2 peak).  相似文献   

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The ultrasonographic diagnosis of pneumothorax is based on the analysis of artifacts. It is possible to confirm or rule out pneumothorax by combining the following signs: lung sliding, the A and B lines, and the lung point. One fundamental advantage of lung ultrasonography is its easy access in any critical situation, especially in patients in the intensive care unit. For this reason, chest ultrasonography can be used as an alternative to plain-film X-rays and computed tomography in critical patients and in patients with normal plain films in whom pneumothorax is strongly suspected, as well as to evaluate the extent of the pneumothorax and monitor its evolution.  相似文献   

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