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Biomedical subjects

K Lehner

Publications and source records attributed to K Lehner.

At least 37 records · Page 2Linked to original sources
PubMed1990

[Imaging of epiphyseolysis of the femur head in the magnetic resonance tomogram].

The diagnosis of epiphyseolysis of the femoral head in its early stages is often unclear when using conventional radiography. In order to obtain additional information, we examined seven patients by means of MRT. In all cases the T1-weighted sequences showed widened, ill-defined epiphyseal plates. The epiphyseal displacement was shown accurately by sections of the sagittal plane. T2-weighted sequences showed the presence of an effusion in the hip joints of five patients. In all patients there was increased signal intensity in the metaphysis and in the femoral neck and head. The increased signal intensity appears to be an early sign for the presence of an epiphyseolysis.

Adolescent↗
PubMed1990

[Magnetic resonance tomography of the shoulder. Possibilities of over interpretation of normal findings].

In order to test the criteria for abnormalities of the shoulder as seen on MR, 30 normal shoulders were examined. The examination included T1, proton and T2-weighted SE sequences and T2*-weighted FE sequences, using transverse, oblique coronary and oblique sagittal planes. In 57% there was increased signal intensity in the tendon of the rotator cuff; this might have been interpreted as a rupture of the cuff or tendinitis. Anatomical examination suggests that the finding is due to a normal layer between the long head of the biceps and the tendon joint complex. The anterior glenoid labrum could not be clearly delineated in 57% and the posterior labrum in 5%. In two cases there was a superior, postero-lateral defect in the head of the humerus. The currently accepted criteria for the MRT diagnosis of shoulder abnormalities need to be critically re-evaluated.

Adolescent↗
PubMed1988

[Value of MR for the diagnosis, differential diagnosis and therapy follow-up of Perthes' disease].

59 children were examined by MR, including 31 with Perthes' disease, 7 with subluxating Perthes' disease and 12 with hip pain of unknown origin; the results were compared with conventional radiological findings. MR was superior for the early recognition and for the exact determination of the extent and localisation of juvenile femoral epiphyseal necrosis. It was also of great help in differential diagnosis. It appears to be a suitable method for judging the effect of therapy at an early stage.

Adolescent↗
PubMed1988

[Indirect lymphography: indications, technic, clinical results].

Indirect lymphography with iotrolan makes it possible to demonstrate the lymphatic pathways with minimal invasiveness. This opens up new possibilities in the differential diagnosis of chronic swelling of the extremities. The typical radiological appearances make it possible to diagnose various types of lymphoedema and lymphangiomatous malformations. The method also promises to be useful in elucidating the pathogenesis of various types of swelling of the extremities.

Adolescent↗
PubMed1988

[Imaging of osteoid osteoma by MR tomography].

We report the demonstration of eight osteoid osteomas by means of magnetic resonance imaging (MRI). The nidus could be depicted showing intermediate signal intensity in T1-weighted and intermediate or increased signal intensity in T2-weighted sequences. It was embedded in thickened bone cortex, which demonstrated a signal-free zone. A different pattern was found in a subchondral osteoid osteoma of the talar dome, in which neither nidus nor sclerotic margin could be delineated. MRI is a valuable diagnostic tool in osteoid osteomas and may provide important information in addition to conventional imaging methods.

Adolescent↗