Aktuelle Radiologie最新文献_第7页

[Dura thickening adjacent to intracranial, para-dural space-occupying lesions in MRI. Histologic correlation]. 硬脑膜增厚毗邻颅内，硬脑膜旁占位性病变MRI。组织学相关)。

Aktuelle Radiologie Pub Date : 1997-11-01

A Hutzelmann, S Palmié, M Freund, R Buhl, M Heller

{"title":"[Dura thickening adjacent to intracranial, para-dural space-occupying lesions in MRI. Histologic correlation].","authors":"A Hutzelmann, S Palmié, M Freund, R Buhl, M Heller","doi":"","DOIUrl":"","url":null,"abstract":"Purpose: With intracranial tumors a flat, contrast-enhancing, probably dural structure adjacent to the tumor can occasionally be observed on gadolinium-DTPA enhanced MR images. Thers we have attempted to evaluate a tumor infiltration of these enhancement on MRI.Material and methods: This study included 50 patients, 19 patients had a dural thickening at the tumor base (13 meningiomas and 6 metastases), while 31 patient did not (12 meningiomas and 19 metastases). Studies included plane T2-weighted spin echo (SE) images as well as T1-weighted axial, coronal, or sagittal plains with and without contrast agent. Histopathological examinations, were done on the tumor base adjacent to the dura mater.Results: 7 of 12 meningiomas showed a meningeal thickening on MRI with histopathologically proven tumor infiltration as did also 5 of 6 metastases. But 3 of 12 meningiomas and 15 of 19 metastases without dural thickening at the tumor base also showed tumor invasion into the dura mater.Conclusion: MR imaging is still not able to determine whether or not there is a dural infiltration of the tumors base because there was no correlation between MR images and histopathologic results. In conclusion, metastases adjacent to the dura infiltrate the dura mater in a higher percentage than meningiomas.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"7 6","pages":"305-8"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20391662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Virtual CT colonoscopy. Examination technique, limitations and perspectives]. 虚拟CT结肠镜检查。检查技术，限制和观点]。

Aktuelle Radiologie Pub Date : 1997-11-01

P Springer, A Dessl, S M Giacomuzzi, Stöhr, A Stöger, G Bodner, W Buchberger

{"title":"[Virtual CT colonoscopy. Examination technique, limitations and perspectives].","authors":"P Springer, A Dessl, S M Giacomuzzi, Stöhr, A Stöger, G Bodner, W Buchberger","doi":"","DOIUrl":"","url":null,"abstract":"Virtual CT-colonoscopy is a post-processing method which allows for reconstruction of inner bowel surface structures from helical CT datasets. The reconstructed images simulate the views which are known from fiberoptic endoscopy. Since colorectal cancer is the second main cause of death in USA and Europe today and since recent screening recommendations are often ignored by the public, a non-invasive or minimal-invasive procedure for colonic evaluation would offer some benefits. Virtual CT-colonoscopy generally involves three essential steps: patient preparation with cleansing of the bowel and administration of an air enema, helical CT-examination by using appropriate scan parameters, and interactive 3D rendering of the volume data-set. Although recent studies have demonstrated that polypoid lesions of about 5 mm size are well detectable and although virtual colonoscopy offers many advantages over fiberoptic endoscopy, some technical and clinical limitations must still be noted. Thus, the current inability of virtual colonoscopy to provide texture and color leads to problems in identifying flat lesions; the presence of retained or adherent fecal matter may result to false positive diagnosis and collapsed segments of bowel may cause problems as they cannot subsequently be evaluated during image reconstruction. Virtual endoscopy is still in its infancy and further technical and clinical developments are necessary. Virtual CT-colonoscopy may then prove to be equal or superior to colonoscopy in sensitivity and specificity for polyp detection and be able to reduce the number of unnecessary colonoscopic procedures.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"7 6","pages":"301-4"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20391661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Recommendations for standardized radiologic follow-up of thrust plate endoprosthesis]. [推力钢板内假体标准化放射学随访建议]。

Aktuelle Radiologie Pub Date : 1997-11-01

G Gruber, J Wricke, H Stürz

{"title":"[Recommendations for standardized radiologic follow-up of thrust plate endoprosthesis].","authors":"G Gruber, J Wricke, H Stürz","doi":"","DOIUrl":"","url":null,"abstract":"The thrust-plate endoprosthesis (TPE) is a cementless, total endoprosthetic replacement of the coxal femur with metaphysical anchorage. A combination of the TPE with an endoprosthetic cup component, which is also cementless, is recommended based on the concept of the TPE. The TPE requires a special radiological technique. In radiological follow-up examinations, the positioning area of the TPE, particularly on the resected femoral neck, is especially important. A gap-free, level positioning of the implant on the resected and flat-ground femoral neck is ideal. In order to be able to exactly judge the positioning area, the bony area and the TPE that lies on it should have no overlap in the anterio-posterior optical path of the X-ray and must be hit exactly orthogonally by the central X-ray beam. As radiological examinations of human femoral preparations show, this succeeds best with an inner rotation positioning of the femur from 10 to 20 degrees. According to our experience, especially in freshly operated patients, the positioning of the legs with the femur in a slightly abducted position (about 10-20 degrees) is better tolerated. Only when the positioning of the TPE cannot be exactly judged with the above-mentioned examination method should the examiner use an X-ray image intensifier. Experience has shown that this is only necessary in exceptional cases. In the present examination, the special problems of radiological examination of the TPE are discussed. Recommendations for standardized radiological examinations, as well as findings following TPE implantation, are given.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"7 6","pages":"312-6"},"PeriodicalIF":0.0,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20391664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Radiologic imaging of MALT lymphoma. (Comparison between stomach roentgen image, computerized tomography and magnetic resonance tomography]. MALT淋巴瘤的影像学分析。(胃x线图像、计算机体层摄影和磁共振体层摄影的比较)。

Aktuelle Radiologie Pub Date : 1997-11-01

J Thiele, J P Schneider, F Schmidt, H G Schulz

引用次数: 0

[Unusual computerized tomography and magnetic resonance imaging of cerebellar metastasis]. [小脑转移的异常计算机断层和磁共振成像]。

Aktuelle Radiologie Pub Date : 1997-11-01

B Vinz, R Grote, C Bartels, S Reissberg

引用次数: 0

[Indications and outcome effectiveness of transpopliteal angioplasty]. [转位血管成形术的适应症和疗效]。

Aktuelle Radiologie Pub Date : 1997-11-01

S A Beyer-Enke, R Adamus, R Loose, E Zeitler