Aktuelle Radiologie最新文献_第2页

[Interventional methods in breast diagnosis. Histological vs. cytological evaluation of core cut biopsies of the breast]. 乳腺诊断中的介入方法。乳腺核心切片的组织学与细胞学评价[j]。

Aktuelle Radiologie Pub Date : 1998-11-01

K Hagedorn, S Krämer, M Mitze, C Breuel, R Schulz-Wendtland, W Bautz, N Lang

{"title":"[Interventional methods in breast diagnosis. Histological vs. cytological evaluation of core cut biopsies of the breast].","authors":"K Hagedorn, S Krämer, M Mitze, C Breuel, R Schulz-Wendtland, W Bautz, N Lang","doi":"","DOIUrl":"","url":null,"abstract":"High speed core cut biopsies of breast tumors, sonographically or stereotactically guided, allow an histological examination of the tumor without surgery. It can be used prior to operation for the confirmation of a breast cancer and it can avoid unnecessary breast surgery in benign tumors. Unfortunately, only some centers are equipped with a pathology unit that allows an immediate histological examination. But often these institutes are provided with an experienced cystologist. Thus, the question arises if a cytology taken from the core cut biopsy is as reliable as an histological examination. In a prospective study we performed unroll-cytologies in core cut biopsies of 173 breast tumors in 169 patients consisting of 122 malignant and 51 benign tumors. Histology of core cut biopsies was proven by operational histology in all malignant and in 5 benign tumors. Histology of core cut biopsies could not be judged in 2 cases (lymphoma, gallert carcinoma). Cytological slide preparations were technically inadequate in 4 cases. The false negative rate of histology was 1/120 and 27/120 in cytology. Histology compared with cytology showed the following results: sensitivity 99.2% versus 77.5%, specificity 100% versus 95.9%, positive predictive value: 100% vs. 97.8%, negative predictive value: 98.1% vs. 63.5%, and accuracy: 99.4% vs. 82.8%. The sensitivity of cytology was much worse than that of histology of core cut biopsies. Thus, in our opinion cytology can provide a quick diagnostic orientation, but it cannot replace the more reliable histological examination. Diagnostic or therapeutic decisions should be based upon the more reliable histological results.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"8 6","pages":"278-82"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20802043","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

[Clinical use of a new analytical method for the determination of bone density by means of quantitative computer tomography]. [定量计算机断层扫描测定骨密度新方法的临床应用]。

Aktuelle Radiologie Pub Date : 1998-11-01

F Herbig, K J Lehmann, G Weisser, S J Diehl, M Georgi

{"title":"[Clinical use of a new analytical method for the determination of bone density by means of quantitative computer tomography].","authors":"F Herbig, K J Lehmann, G Weisser, S J Diehl, M Georgi","doi":"","DOIUrl":"","url":null,"abstract":"Aim: Evaluation of the clinical suitability of a new analytical method for the determination of bone mineral density (BMD) by means of SEQCT as well as a comparison with the established method.Methods: In order to verify the stability of both systems, phantom measurements were performed on a lumbal spine torso as well as on 78 patients. 44 patients were examined by means of the established method and 34 according to the new method. Parallel measurements were possible in 15 patients.Results: The phantom measurements proved a high stability of both methods. Regarding the absolute BMD the new method resulted in higher BMD values. This result was confirmed by parallel measurements in 15 patients. The new method demonstrated increased suitability due to less time consuming preparations. Dose reduced scan parameters could not be achieved in all patients, so that the time saving effect could not be considered. In these cases manual settings were required.Conclusion: A substitution of the established method for BMD measurement by means of SEQCT with the new method seems to be possible. However, the results will have to be corrected by the percentage of deviation from the default value of the quality phantom.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"8 6","pages":"283-7"},"PeriodicalIF":0.0,"publicationDate":"1998-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20802044","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

[Iodine delivery rate in catheter angiography under pressure conditions in manual injection]. [人工注射压力条件下导管血管造影碘输送率]。

Aktuelle Radiologie Pub Date : 1998-09-01

H P Busch, K P Stocker

{"title":"[Iodine delivery rate in catheter angiography under pressure conditions in manual injection].","authors":"H P Busch, K P Stocker","doi":"","DOIUrl":"","url":null,"abstract":"Purpose: The aim of this study was to record the flow-rate and to calculate the \"iodine delivery rate\" (IDR) of contrast media of various viscosities when the contrast media are injected by hand.Methods: Five different catheters for coronary angiography were tested with the injection system Medrad Mark V Plus. Injections were performed with pressures of 100, 200 and 400 PSI. The contrast media examined were Imeron 350, Imeron 400, Omnipaque 350 and Ultravist 370. The IDR was calculated on the basis of the measured flow rate and the Iodine content of the contrast medium.Results: As was expected, the IDR was higher as the pressure increased. In addition to the Iodine content the viscosity of the contrast medium is a very important factor for the IDR. At both 100 PSI and 200 PSI the increase of the IDR was higher with Imeron 350 than with Imeron 400. The comparison of contrast media with identical Iodine contents but differing viscosities (Imeron 350, Omnipaque 350) clearly showed that the IDR depended on viscosity.Conclusion: The \"iodine delivery rate\" is a decisive factor in the opacification of arterial vessels. Both Iodine content and viscosity of a contrast medium are important for the IDR. Because of the low pressure at manual injection, contrast media with low viscosities should be used. A further possibility to increase the IDR is warming-up the contrast medium to body temperature.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"8 5","pages":"232-5"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20712356","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 changes following cement-free implantation of hip prostheses. 5-year follow-up and clinical experience with the cement-free hip prosthesis Autophor-900-S]. 无骨水泥人工髋关节植入后的放射学改变。无骨水泥人工髋关节5年随访及临床经验[j]。

Aktuelle Radiologie Pub Date : 1998-09-01

K Wilhelm, R Conrad, H Reich, H Zieger, H Schild

{"title":"[Radiologic changes following cement-free implantation of hip prostheses. 5-year follow-up and clinical experience with the cement-free hip prosthesis Autophor-900-S].","authors":"K Wilhelm, R Conrad, H Reich, H Zieger, H Schild","doi":"","DOIUrl":"","url":null,"abstract":"Purpose: To evaluate early reliable radiographic signs of loosening in cementless total hip arthroplasty compared to clinical follow-up.Methods: Within a time interval of 5 years 89 patients with 101 hips underwent total hip arthroplasty using the Autophor 900 S-prosthesis. Clinical and radiographic follow-up were first performed retrospectively followed by a prospective investigation.Results: Radiographic evaluation showed prosthesis fixation in 93%. Loosening of the prosthesis was identified in 4 cases of the acetabular component and in 4 cases of the femoral stem. Pain was associated with radiographically detectable loosening of the cementless arthroplastic components in only two cases.Conclusion: Within a follow-up period of up to five years, loosening of cementless total hip arthroplasty occurs in about 7%. The most reliable radiographic signs of loosening are complete radiolucent zones wider than 2 mm at the bone-component interface, progressive subsidence, migration, or tilt of the component. Pain and movement disorders are not specific symptoms and do not necessarily indicate a loosening of the prosthesis.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"8 5","pages":"225-31"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20712355","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

[Effect of collimation and pitch on radiation exposure and image quality in spiral CT of the thorax]. [胸部螺旋CT准直和俯仰对辐射暴露和图像质量的影响]。

Aktuelle Radiologie Pub Date : 1998-09-01

J Barkhausen, F Stöblen, R D Müller, U Streubühr, K Ewen

{"title":"[Effect of collimation and pitch on radiation exposure and image quality in spiral CT of the thorax].","authors":"J Barkhausen, F Stöblen, R D Müller, U Streubühr, K Ewen","doi":"","DOIUrl":"","url":null,"abstract":"Purpose: The aim of the study was to optimize the scan parameters for spiral-CT of the thorax.Methods: Using a Somatom AR-SP (Siemens AG, Erlangen) CT-unit, four different scanning protocols (collimation/table feed) were compared: A (5/10), B (10/10), C (10/15), D (10/20). High contrast resolution in the xy-plane and in the z-direction were investigated with special phantoms. Noise levels were measured using a water phantom, the radiation exposure of lung parenchyma was investigated using an Alderson-Rande-Phantom. An anthropoid chest phantom was scanned to compare the image quality of the four protocols.Results: Protocol A showed the best resolution in the z-direction; the resolution in the xy-plane was equal for all protocols. Image noise in the center of the water phantom was 58 HU for protocol A and 40 HU for the other three. The following equivalent organ dose were measured for lung parenchyma: A 14 mSv, B 29 mSv, C 20 mSv, D 14 mSv.Conclusion: Scanning protocols with small collimation and a pitch of 2 are characterised by low radiation exposure and excellent resolution in the z-direction. These parameters seem to be most suitable for lung scanning.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"8 5","pages":"220-4"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20712465","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

[Spontaneous splenic and renal rupture in polyarteritis nodosa]. 结节性多动脉炎自发性脾、肾破裂。

Aktuelle Radiologie Pub Date : 1998-09-01

M Siebels, K Andrassy, G Nöldge, R Sanwald

引用次数: 0

[Quality assurance of image documentation systems. Acceptance test, constancy control]. [图像文件系统的质量保证。验收测试，恒常性控制]。

Aktuelle Radiologie Pub Date : 1998-09-01

R Weberling

引用次数: 0

[Diagnosis and therapy of Budd-Chiari syndrome]. 【Budd-Chiari综合征的诊断与治疗】。

Aktuelle Radiologie Pub Date : 1998-09-01

R Bachmann, H Strunk, K A Brensing, U Hofer, H Schild

{"title":"[Diagnosis and therapy of Budd-Chiari syndrome].","authors":"R Bachmann, H Strunk, K A Brensing, U Hofer, H Schild","doi":"","DOIUrl":"","url":null,"abstract":"Purpose: Budd-Chiari syndrome is a fairly uncommon disease in Europe. This often leads to its late diagnosis. The syndrome is characterised by portal hypertension and splanchnic congestion due to obstruction of hepatic venous outflow. This paper describes the treatment of three patients with Budd-Chiari syndrome by interventional therapeutic techniques and discusses alternative treatment modalities.Patients and methods: The first patient presented with veno-occlusive disease and was treated by the placement of a transjugular intrahepatic portosystemic stent-shunt. The second patient showed an occlusion of the major hepatic veins. After percutaneous recanalisation, a stent was placed in the right hepatic vein which remained patient. The third patient had a membranous obstruction of the right hepatic vein which was treated by percutaneous balloon dilatation.Results: In all patients the clinical symptoms resolved completely after treatment and no complications were encountered.Conclusions: The authors conclude that interventional therapeutic techniques offer a wide variety of possibilities for the treatment of patients with Budd-Chiari syndrome and are safe, effective and relatively inexpensive. However, further studies are required to assess the long-term results and survival rates of these patients.","PeriodicalId":76986,"journal":{"name":"Aktuelle Radiologie","volume":"8 5","pages":"213-9"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20712464","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

[Bullet embolism in the right pulmonary artery]. [右肺动脉子弹栓塞]。

Aktuelle Radiologie Pub Date : 1998-07-01

R Schöpf, D Lungenschmid, D Hagen

引用次数: 0

[Radiation protection in the European Community and in Germany]. [欧洲共同体和德国的辐射防护]。

Aktuelle Radiologie Pub Date : 1998-07-01

T Schmidt

引用次数: 0