A Ringelstein

Learn More
To investigate dual-energy CT of hypervascular liver lesions in patients with HCC. Forty patients with hepatocellular carcinomas were investigated with abdominal dual-energy CT. In each patient unenhanced and contrast-enhanced imaging with arterial und portovenous delay were performed. Hypervascular lesions were documented on arterial phase 80-kVp images,(More)
OBJECTIVE Diffuse axonal injury (DAI) is a specific type of traumatic brain injury caused by shearing forces leading to widespread tearing of axons and small vessels. Traumatic microbleeds (TMBs) are regarded as a radiological marker for DAI. This study aims to compare DAI-associated TMBs at 3 Tesla (T) and 7 T susceptibility weighted imaging (SWI) to(More)
PURPOSE To evaluate noncontrast material-enhanced steady-state free precession (SSFP) magnetic resonance (MR) angiography in the assessment of transplant renal arteries (RAs) by using digital subtraction angiography (DSA) as the reference standard. MATERIALS AND METHODS This prospective study was approved by the institutional review board; written(More)
BACKGROUND We are the first to report one-staged resection of a spinal metastasis from malignant cranial hemangiopericytoma after preoperative Onyx™-20 embolization by direct percutaneous puncture.Spinal metastases from cranial hemangiopericytoma are extremely rare. Surgical morbidity of these highly vascularized tumours results mainly from excessive blood(More)
Immune reconstitution inflammatory syndrome (IRIS) after HAART may become manifest in form of aseptic severe leucoencephalopathy. All HIV-1-positive patients in this case series had widespread laboratory tests and follow-up MRI in order to investigate the course and the underlying pathophysiology of IRIS-associated leucoencephalopathy. All patients were(More)
BACKGROUND AND PURPOSE To assess patient radiation exposure in comprehensive stroke imaging using multidetector row CT (MDCT) combining standard CT of the head, cerebral perfusion (CTP), and CT angiography (CTA) studies. METHODS Examination protocols for CT and CTA of cerebral and cervical vessels, as well as CTP were simulated using a Somatom Sensation(More)
BACKGROUND AND PURPOSE Inflammation contributes to brain damage caused by ischemic stroke. Ultrasmall superparamagnetic iron oxide (USPIO)-enhanced MRI allows noninvasive monitoring of macrophage recruitment into ischemic brain lesions. In this study, we determined the extent of USPIO enhancement during early stages of ischemic stroke. METHODS Twelve(More)
OBJECTIVE The aim of this study was to analyze our clinical and neurological results of surgically treated patients suffering from cervical spondylodiscitis with focusing particularly on the surgical methods used and to review the literature. PATIENTS AND METHODS We present a series of 21 patients operated with cervical spondylodiscitis between 1998 and(More)
BACKGROUND Magnetic resonance imaging (MRI) is an indispensable tool in the diagnostic work-up of multiple sclerosis (MS). To date, guidelines suggest MRI protocols containing axial dual-echo, unenhanced and post-contrast T1-weighted sequences. Especially the usage of dual-echo sequences has markedly improved the ability of MRI to detect cortical and(More)