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Intramedullary abscesses of the spinal cord are uncommon. Most of them occur in association with heart, pulmonary or urogenital infections. We report two cases of intramedullary spinal cord abscesses secondary to congenital dermal sinus. Only 14 cases of such an association have previously been reported. In our cases, dermal sinus was associated with an(More)
BACKGROUND Patients with nevoid basal cell carcinoma syndrome (NBCCS) are believed to be predisposed to develop early-onset neoplasms including medulloblastomas (MB). The desmoplastic subtype of MB is associated most commonly with NBCCS. The goals of this study were to demonstrate the relation between desmoplastic MB and NBCCS and to evaluate the(More)
OBJECTIVE To compare 3D time-of-flight MR angiography (TOF-MRA) at 3 Tesla (3T) with digital subtraction angiography (DSA) for the evaluation of intracranial aneurysm occlusion after endovascular coiling. METHODS In a prospective study, 51 consecutive patients (25 females, 26 males; median age, 51 years) with 51 saccular aneurysms treated with(More)
OBJECTIVE Movements of brain tissue during neurosurgical procedures reduce the effectiveness of using pre-operative images for intra-operative surgical guidance. In this paper, we explore the use of acquiring intra-operative ultrasound (US) images for the quantification of and correction for non-linear brain deformations. MATERIALS AND METHODS We will(More)
In this paper, we outline a way to improve computer-assisted neurosurgery using surgical models along with patient-specific models built from multimodal images. We propose a methodological framework for surgical models that include the definition of a surgical ontology, the development of software for describing surgical procedures based on this ontology(More)
Any variations in the origin of the ophthalmic a. are uncommon and well-explained by the comparative anatomy and human embryology. A unique case is reported of an ophthalmic a. arising from the middle meningeal a. associated with an occlusion of the central retinal a. Embryologic variations which can give such an unusual origin are discussed. Although this(More)
This paper describes an interactive system for the semantic annotation of brain magnetic resonance images. The system uses both a numerical atlas and symbolic knowledge of brain anatomical structures depicted using the Semantic Web standards. This knowledge is combined with graphical data, automatically extracted from the images by imaging tools. The(More)
Ultrasound (US) imaging is often proposed as an interoperative imaging modality. This use nearly always requires that the collected data be registered to preoperative data of another modality. Existing intensity-based registration approaches all begin by reconstructing a 3D US volume from the collected 2D slices. We propose to directly register the set of(More)
BACKGROUND Up to now, extra-dural haematomas (EDH) in elderly patients have been known for their poor prognosis and few studies have focused on the particularity of EDH in the elderly. Most clinical studies relating to EDH have generally focused on its occurrence in children and the middle-aged, grouping people of over 50 and 60 years together as the(More)
PURPOSE Anterior iliac crest bone is a widely used donor site for bone harvesting. It provides an autologous bone graft consisting of cancellous bone that can be packed or cortical bone with greater structural support. Uses include spinal fusion and fracture non-union surgery. Although its use is common, dedicated anatomical and radiological studies(More)