[Whole-body MRT studies--the results of the "Multicenter study on the evaluation of magnetic resonance tomography"].

In a nation-wide multicentre study, the use of MRI was examined in its clinical context and in relation to other imaging methods and as a routine examination. It was found that examinations of the brain and spine were predominant. MRI is accurate for certain problems affecting the extremities, the pelvis and the liver.

[Evaluating magnetic resonance tomography studies of the extremities--results of a multicenter study for evaluating nuclear magnetic resonance tomography].

MR examinations of the extremities occupy the first place in whole body examinations via MR. Highest accuracy quotas in this area with an average of 93.8% were obtained for tumours, trauma and necroses of the bones.

[Obstacles to the routine use of magnetic resonance imaging--results of a multicenter study for evaluating nuclear magnetic resonance tomography].

Within the framework of this study, the factors that impair the value of MR scans were also investigated and analysed. It was found that artifacts occurred in a large number of examinations that exercised a negative effect on the results. Artifacts are particularly seen in the thorax (54%) and upper abdomen (57%), but they have also been reported in 23% of the CNS examinations.

[NMR studies of the whole body--results of a multicenter study for evaluating nuclear magnetic resonance tomography].

Within the framework of a national multi-centre study the spectrum of application and the ranking of magnetic resonance tomography were investigated. Although scans of the brain and vertebral column still dominate the scene, it has become evident that whole body scanning via MR can be very accurate for certain indications. This is particularly true for examinations of gynaecological diseases (95%) and for lesions of the liver (97%).

Quantification and classification of echographic findings in the thyroid gland by computerized B-mode texture analysis.

Computerized B-mode image analysis was investigated in a pilot study to establish quantitative criteria for thyroid echography and to demonstrate the diagnostic accuracy of the procedure in thyroid disease. The ten per cent percentile of grey level distribution and entropy proved to be the most efficient statistical parameters. Computerized ultrasound detected all nodular lesions with an overall accuracy of about 85%.