Bildgebung = Imaging最新文献_第10页

Medullary nephrocalcinosis: sonographic findings in adult patients. 髓质肾钙质沉着症:成人患者的超声表现。

Bildgebung = Imaging Pub Date : 1995-03-01

J Riehl, B Schneider, D Bongartz, H G Sieberth

引用次数: 0

Clinical significance of sonographic findings in outpatient clinics. 门诊超声表现的临床意义。

Bildgebung = Imaging Pub Date : 1994-12-01

S Hollerbach, E Frick, F Kullmann, G Lock, V Gross, J Schölmerich

{"title":"Clinical significance of sonographic findings in outpatient clinics.","authors":"S Hollerbach, E Frick, F Kullmann, G Lock, V Gross, J Schölmerich","doi":"","DOIUrl":"","url":null,"abstract":"In the literature substantial controversy exists about the clinical significance of abdominal screening procedures. Therefore, the aim of our prospective study was to determine the clinical relevance and the differences of sonographic findings in both symptomatic and asymptomatic screening outpatients. We therefore systematically analyzed the sonographic findings in 200 consecutive patients of a medical outpatient unit. The patients were divided into 2 subgroups: group I consisted of 128 patients without specific clinical symptoms in the abdomen (screening group); group II included 72 patients with abdominal symptoms and therefore well-defined sonographic requests. The consequences drawn from the sonographic results were analyzed separately for both patient groups. All findings were subdivided into relevant, prospectively relevant or not relevant, depending on their individual influence on the patients' course. In all cases the entire abdomen and basal parts of the thorax were examined. In the 1st group (n = 128/93 findings) 6 findings (6.5%) were relevant, 24 (26%) prospectively relevant and 63 not relevant (67.5%). In contrast, the 2nd group (n = 72/68 findings) contained 13 relevant (19%), 27 prospectively relevant (40%) and 28 not relevant sonographic findings (41%). The differences between group I and II were statistically significant for the relevant findings (2p < 0.05) and the not relevant findings (2p < 0.01). In conclusion, abdominal ultrasonography provides--even for the screening of the outpatient population--in up to 30% additional clinically acute or prospectively relevant information. Therefore, it completes the physical examination adding a substantial amount of clinical information to the medical record of outpatients.","PeriodicalId":77035,"journal":{"name":"Bildgebung = Imaging","volume":"61 4","pages":"242-7"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18847838","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

[Diagnosis of the breast tumor entity with "vocal fremitus" in ultrasound diagnosis]. 【超声诊断乳腺肿瘤实体伴“声带松脱”的诊断】。

Bildgebung = Imaging Pub Date : 1994-12-01

C Sohn, A Baudendistel, G Bastert

{"title":"[Diagnosis of the breast tumor entity with \"vocal fremitus\" in ultrasound diagnosis].","authors":"C Sohn, A Baudendistel, G Bastert","doi":"","DOIUrl":"","url":null,"abstract":"In the published study a totally new method for the diagnosis of malign and benign tumors of the female breast is presented. During sonographic examinations with the maximum entropy method we found out, purely by chance, that artifacts produced by vibrations of the thorax can be used to differentiate malignant from benign lesions. These artifacts in form of small colour pixels can be provoked by the vocal fremitus of the internal medicine or by humming a deep sound. In case of malignancy, the colour artifacts are visible inside of the tumor, in benign lesions, however, only in the surrounding tissue. On the preoperative day, 95 patients were examined with the method described above. In 91% of the cases the diagnosis of the dignity corresponded with the histological results. Seven times a benign lesion was classified as a malignant tumor and twice malignancy was not correctly diagnosed. Our explanation of these phenomena is the following: Benign lesions of the female breast show a displacing growth and a definable boundary. Thus the vibrations are damped and not conducted into the tumor. In contrast, malignant lesions grow invasively into the surrounding tissue. Consequently, the vibrations can be conducted into the center of the tumor by this dissemination.","PeriodicalId":77035,"journal":{"name":"Bildgebung = Imaging","volume":"61 4","pages":"291-4"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18540741","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

[Texture analysis: a new method for evaluating ultrasound imaged lesions of the breast]. 纹理分析:一种评价乳腺超声成像病变的新方法。

Bildgebung = Imaging Pub Date : 1994-12-01

W Bader, S Böhmer, W R Otto, F Degenhardt, J Schneider

{"title":"[Texture analysis: a new method for evaluating ultrasound imaged lesions of the breast].","authors":"W Bader, S Böhmer, W R Otto, F Degenhardt, J Schneider","doi":"","DOIUrl":"","url":null,"abstract":"Echogenicity and echostructure in sonomammography are essential criteria to determine the malignancy of a breast tumor. Looking for a correlation between echostructure of an ultrasound image and its histopathology a texture analysis was performed. Ultrasonic examinations were carried out by means of a 7.5-MHz linear scanner under standardized conditions. 71 mammasonographic findings were documented by video tape, each tumor in 2 dimensions. In a second step 'the region of interest', that means the whole tumor area, was marked and statistically analyzed by a dedicated computer system. The values of 23 first- and second-order statistical texture parameters were compared with the histopathology of the tumor. They include grey level histogram, Fourier analysis and cooccurrence matrix. The most important results were obtained in the histogram analysis. An obvious distinction could be worked out concerning carcinomas, adenomas, mastopathic tumors, and fat necrosis. Except the difference between carcinomas and adenomas this distinction was statistically significant. Fourier analysis and coocurrence matrix significantly separate fibrocystic lesions, fat necrosis, scars, and cystic structures from malignant tumors. Furthermore the maximum value method was used to compare the different parameters with regard to their capability of discriminating benign and malignant tumors. The extreme values of 100% were mostly observed in the case of seromas and scars. A significant difference was found by histological grading of carcinomas, too. Highly differenciated carcinomas show capability of results comparable to those of adenomas. By means of a computer texture analysis program it is possible to find a correlation between echostructure and histopathology of breast tumors.(ABSTRACT TRUNCATED AT 250 WORDS)","PeriodicalId":77035,"journal":{"name":"Bildgebung = Imaging","volume":"61 4","pages":"284-90"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18847165","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

Diagnostic evaluation and surgical management of the aberrant right subclavian artery. 右锁骨下动脉异常的诊断、评价及手术治疗。

Bildgebung = Imaging Pub Date : 1994-12-01

J Harms, T Vogel, J Ennker, R Felix, R Hetzer

引用次数: 0

[Comparison of CT and MRI methods in diagnosis of tumors of the para- and retropharyngeal space and temporal bone]. [CT与MRI诊断咽旁、咽后间隙及颞骨肿瘤的比较]。

Bildgebung = Imaging Pub Date : 1994-12-01

P Held, A Breit

{"title":"[Comparison of CT and MRI methods in diagnosis of tumors of the para- and retropharyngeal space and temporal bone].","authors":"P Held, A Breit","doi":"","DOIUrl":"","url":null,"abstract":"The aim of this paper was to compare the diagnostic value of computed tomography (CT) and magnetic resonance imaging (MRI) in the evaluation of malignant tumors of the temporal bone, of paragangliomas of the glomus tympanicum and jugulare as well as of malignant tumors of the para- and retropharyngeal space. 67 patients with tumors of the temporal bone--28 cases with malignant tumors and 39 cases with paragangliomas--were examined with MRI and CT. MRI had true-positive findings in nearly 93, CT in 89% of the patients with malignant tumors of the temporal bone. MRI is therefore recommended as the primary imaging investigation of malignant tumors of the temporal bone. Whereas the temporal bone is best visualized by high-resolution CT with thin slices, the tumor extension--especially cranial spread into the middle and posterior cranial fossa and caudal spread into the infratemporal fossa--is better detected on MRI. Enhanced T1-weighted spin-echo images with fat-signal suppression are most suitable for this purpose. Using 3D sequences, partial volume effects can be avoided with an attainable slice thickness of 0.8-1.0 mm. Furthermore, arbitrary slices--very helpful when studying the complex anatomy of the skull base--can be calculated from a 3D data set. MRI had true-positive findings in 97, CT in nearly 90% of the patients with paragangliomas. Furthermore, the response of paragangliomas to radiotherapy can be more accurately assessed on MR--independent of and before volumetric changes.(ABSTRACT TRUNCATED AT 250 WORDS)","PeriodicalId":77035,"journal":{"name":"Bildgebung = Imaging","volume":"61 4","pages":"263-71"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18847162","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

[Densitometry in suspected preclinical osteoporosis: quantitative computerized tomography versus dual energy roentgen absorptiometry]. [疑似临床前骨质疏松症的密度测量:定量计算机断层扫描与双能x线吸收仪]。

Bildgebung = Imaging Pub Date : 1994-12-01

C Frahm, J Link, K Hakelberg, H D Weiss, J Rademaker

{"title":"[Densitometry in suspected preclinical osteoporosis: quantitative computerized tomography versus dual energy roentgen absorptiometry].","authors":"C Frahm, J Link, K Hakelberg, H D Weiss, J Rademaker","doi":"","DOIUrl":"","url":null,"abstract":"The bone mineral density of 85 patients with suspicion of a preclinical osteoporosis was measured at the lumbar spine by using quantitative computed tomography (QCT) in single-energy technique (SEQCT) and dual-energy technique (DEQCT) as well as by using dual-energy X-ray absorptiometry (DEXA). Additionally, the bone density of 63 of these patients was measured at the left femoral neck using DEXA. DEQCT und DEXA of the lumbar spine showed only a moderate correlation (R = 0.75) and differed considerably concerning the classification of the patients as normals or individuals with a mineral deficit when compared with age-matched normals (relative mineral deficit). The DEXA proved to be susceptible to degenerative alterations of the lumbar spine. Because of the extremely low dose of radiation and the good reproducibility the DEXA could nevertheless be recommended as a method for the long-time progress control especially for younger patients. SEQCT and DEQCT showed a very strong correlation (R = 0.98). The SEQCT with its lower dose of radiation should be sufficient for a long-time progress control and in many cases also for the initial diagnostics. Significant but only moderate correlations were found between the bone density at the femoral neck and the DEXA or DEQCT results (R = 0.68 respectively R = 0.63) for the lumbar spine, so that the linear regression did not render any useable approximations. Sufficiently exact information about the mineralization status of a certain skeletal site can only be obtained by direct measurement.","PeriodicalId":77035,"journal":{"name":"Bildgebung = Imaging","volume":"61 4","pages":"256-62"},"PeriodicalIF":0.0,"publicationDate":"1994-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18847161","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

[Computer assisted analysis of the morphology of cutaneous capillaries in human intravital microscopy]. [人体活体显微镜下皮肤毛细血管形态的计算机辅助分析]。

Bildgebung = Imaging Pub Date : 1994-12-01

F Jung, H P Nüttgens, R Klass, H Kiesewetter, E Wenzel

引用次数: 0

[Simplified percutaneous transluminal angioplasty by a new kind of guide wire--initial experiences]. 一种新型导丝简化经皮腔内血管成形术——初步经验。

Bildgebung = Imaging Pub Date : 1994-12-01

J Hallermeier, N Rupp, M Englmaier

引用次数: 0

[Comparison of computerized tomography and B-image ultrasound in imaging diagnosis of the mediastinum]. [计算机体层摄影与b超影像诊断纵隔的比较]。

Bildgebung = Imaging Pub Date : 1994-12-01

B Betsch, R Berndt, M V Knopp, A Schmähl, U Trost, S Delorme

引用次数: 0