CT angiography is a low-risk technique with a low level of invasiveness that is useful in following up known aneurysms. The 3D reconstruction yields further topographic information that helps in the planning of endovascular or surgical intervention. The facility for rotating the reconstructed vessels and displaying them from different angles is of particular value in cases difficult to assess at angiography.
At the University of Tübingen a Linac based stereotactic system for radiosurgery has been used since 1991. The floorstand system (SRS 200, Phillips) developed at Gainsville is used in combination with a Cosman Roberts Weels system by Radionics. The floorstand enables the gantry to be rotated vertically and the table to be rotated in the horizontal plane. Additionally, patient's movements are reduced by the fixation of the stereotactic ring to the stereotactic floorstand. We report our experience with the first 50 patients treated between December 1991 and June 1995. The patients were treated with an interdisciplinary approach. This cooperation eases the transition from radiosurgery to other methods such as embolization, operation, and other radiooncologic treatment options.
Oculomotor nerve palsies involving only the internal eye muscles are extremely rare. The authors report a 33-year-old female who presented with isolated pupillary and ciliary dysfunction that eventually turned into a typical third nerve palsy. In I 979 she developed a tonically dilated pupil with preserved, but reduced accommodation. In I 993 she began to develop diplopia on eccentric gaze direction. The pupil had become dilated and completely immobile and the ciliary muscle was paralytic. Eye motility abnormalities were consistent with a mild third nerve paresis and there was an elevation of the upper eyelid on adduction (primary misdirected regeneration). MRI revealed a parasellar mass lesion, probably a neurinoma, arising from the right oculomotor nerve. The authors decided not to treat this slowly growing tumor. Phone 49707 I 294786 Fax 497071 295038 Oral Presentation at the Meeting of the International Neuro-ophthalmological Society. June 5 -9~ "394 in Freiburg/Gemany Key words tor nerve; cranial nerves; primary aberrant regeneration Third nerve palsy; pupil; tonic pupil; tumor of the oculomo-Oculomotor nerve paresis starting as isolated internal ophthalmoplegia 2 I I Neuroophthalmology Downloaded from informahealthcare.com by McMaster University on 01/05/15 For personal use only.
Pre-treatment CT examinations of 333 patients with squamous carcinomas in the head and neck region have been analysed. Two hundred and six patients had lymph-node metastases and lymph-node staging was ascertained. The criteria for metastatic involvement were lymph node size greater than 15 mm. and changes in structure (inhomogeneity, central hypodensity and ring enhancement). CT had a sensitivity of 93% and accuracy of 89%. This was better than palpation (sensitivity 64%, accuracy 72%). CT can be regarded as a reliable basis for treatment planning.
High zoom factors for MRT of the shoulder joint can lead to disturbing artifacts. The use of special saturation coils can improve longitudinal magnetisation of the central image, making it possible to produce artifact-free images of the shoulder with high resolution. Two normals and 20 patients with the rotator cuff syndrome, as well as other inflammatory and neoplastic processes, have been examined. The findings have been correlated with those of arthrography, arthro-sonography, bone scintigraphy, CT and simple radiographic examination. The MRT findings were compared with the other imaging techniques and the results are discussed. MRT proved superior to other techniques, particularly in the elucidation of soft tissue abnormalities in the rotator cuff syndrome.
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