[Complication after Embolization of an AVM with Onyx].

Report on a 34-year-old woman with an arteriovenous malformation (AVM) in the area of the right hippocampus. On the basis of an interdisciplinary indication for step-by-step embolization of the AVM, the first partial embolization with Onyx occurred successfully and without complications. 10 days later, the second partial embolization also turned out well, but during retraction of the microcatheter an exit of Onyx happened into the guiding catheter in spite of continuous aspiration.

Short TE single-voxel 1H-MR spectroscopy of hippocampal structures in healthy adults at 1.5 Tesla--how reproducible are the results?

The purpose of our study was to evaluate inter- and intra-subject variability and scan-rescan reproducibility of single-voxel 1H-MR spectroscopy (1H-MRS) in hippocampal structures at 1.5 T field strength. Thirty healthy adults were studied bilaterally by optimized, standardized short echo time single-voxel 1H-MRS (PRESS, TE=30 ms, TR=3000 ms, oblique voxel orientation, voxel size 2 cm3).

Internal carotid artery injury during functional endoscopic sinus surgery and its management.

Rupture of the internal carotid artery (ICA) during functional endoscopic sinus surgery (FESS) is a rare complication, which can potentially result in death. Only a few cases have been reported in the literature thus far. We present four cases with an ICA bleeding during sphenoidotomy.

[Multimodal computed tomography in acute cerebral infarction. Experience with a standardized protocol in 100 patients].

Computed tomography (CT) is the standard method of brain imaging in acute stroke. To an experienced examiner, nonenhanced CT will exclude hemorrhage and may indicate early ischemic signs. Reliable description of an ischemic area and the underlying vascular disease is not possible in the acute phase but is possible, particularly within the first hours, when therapeutic decisions on matters such as systemic thrombolysis are to be made.

Three-dimensional visualization of neurovascular relationships in the posterior fossa: technique and clinical application.

Object: The goal of this study was to describe the authors' technique for three-dimensional (3D) visualization of neurovascular relationships in the posterior fossa at the surface of the brainstem. This technique is based on the processing of high-resolution magnetic resonance (MR) imaging data. The principles and technical details involved in the accurate simultaneous visualization of vessels and cranial nerves as tiny structures are presented using explicit and implicit segmentation as well as volume rendering.