The knowledge of the relationship that links radiation dose and image quality is a prerequisite to any optimization of medical diagnostic radiology. Image quality depends, on the one hand, on the physical parameters such as contrast, resolution, and noise, and on the other hand, on characteristics of the observer that assesses the image. While the role of… (More)
A mode-locked titanium-sapphire laser with 15 fs pulse width is used to determine the temporal profile of the ultrashort electron bunches in the linear TESLA Test accelerator. The experimental setup is described and first results are presented on the synchronization of the Ti:Sa laser with the radio frequency of the supercon-ducting accelerator and on the… (More)
BACKGROUND Spinal dural arteriovenous fistulae (SDAVF) are rare but remain the most common type of spinal vascular malformations. Treatment options for SDAVF include endovascular embolization, microsurgical dissection or a combination of both. But the optimal treatment paradigm has yet to be defined and may well be an individualized interdisciplinary… (More)
OBJECTIVE The correlation between the severity of neurological deficit of patients with symptomatic spinal metastases and short-term, postoperative, functional improvements after surgery is unclear. The aim of this clinical trial was to determine the influence of neurological deficit severity on short-term functional outcomes after surgery, and to devise… (More)
OBJECTIVE Despite modern microsurgical techniques and interdisciplinary treatment options, intramedullary spinal cord tumors often lead to profound neurological deficits. Some patients may search for non-scientific or unconventional therapeutic options to treat the symptoms induced by the tumor itself or arising from treatment. The extent of non-scientific… (More)
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