Simultaneous segmentation and anatomical labeling of the cerebral vasculature.

We present a novel algorithm for the simultaneous segmentation and anatomical labeling of the cerebral vasculature. Unlike existing approaches that first attempt to obtain a good segmentation and then perform labeling, we optimize for both by simultaneously taking into account the image evidence and the prior knowledge about the geometry and connectivity of the vasculature. This is achieved by first constructing an overcomplete graph capturing the vasculature, and then selecting and labeling the subset of edges that most likely represents the true vasculature.

Simultaneous segmentation and anatomical labeling of the cerebral vasculature.

We present a novel algorithm for the simultaneous segmentation and anatomical labeling of the cerebral vasculature. The method first constructs an overcomplete graph capturing the vasculature. It then selects and labels the subset of edges that most likely represents the true vasculature.

Anatomical labeling of the circle of willis using maximum a posteriori graph matching.

A new method for anatomically labeling the vasculature is presented and applied to the Circle of Willis. Our method converts the segmented vasculature into a graph that is matched with an annotated graph atlas in a maximum a posteriori (MAP) way. The MAP matching is formulated as a quadratic binary programming problem which can be solved efficiently.

Study of perfusion in and around cerebral contusions by means of computed tomography.

Background: Several authors have found low absolute values of cerebral blood flow (CBF) in both contusion core and pericontusional parenchyma ofhead-injured patients by means of Xenon Computed Tomography (CT). Perfusion CT has become available as a new and validated tool for studying CBF in patients. The aim of the present study was to assess the relation between volume expansion of contusions and pericontusional CBF measured by perfusion CT.

Acquired uterine vascular malformations: radiological and clinical outcome after transcatheter embolotherapy.

The purpose of this retrospective study is to assess the radiological and clinical outcome of transcatheter embolization of acquired uterine vascular malformations in patients presenting with secondary postpartum or postabortion vaginal hemorrhage. In a cohort of 17 patients (mean age: 29.7 years; standard deviation: 4.

Hemorrhagic complications after nephron-sparing surgery: angiographic diagnosis and management by transcatheter embolization.

Objective: Nephron-sparing surgery has become an accepted treatment technique for renal cell carcinoma in properly selected patients. Although rare, major postoperative hemorrhage can occur and is usually accompanied by gross hematuria with or without acute flank pain at the site of prior surgery. In this retrospective study, the immediate radiologic and clinical success and the long-term follow-up of transcatheter embolization are evaluated.

Early and long-term clinical and radiological follow-up results of expanded-polytetrafluoroethylene-covered stent-grafts for transjugular intrahepatic portosystemic shunt procedures.

The purpose of this study was to assess the therapeutic efficacy and immediate and long-term safety of expanded-tetrafluoroethylene covered stent-grafts for transjugular intrahepatic portosystemic shunts in patients with portal hypertension-related complications. A cohort of 56 patients suffering from severe portal hypertension-related complications underwent implantation of an expanded-polytetrafluoroethylene-covered stent-graft. All patients suffered from severe liver cirrhosis graded Child-Pugh A (n=8; 16%), B (n=13; 21%) or C (n=35; 63%).

Dural arteriovenous fistula as a late complication of upper cervical spine fracture. Case report.

The authors report an unusual case of a dural arteriovenous fistula (DAVF) in the cervical spine after a C1-2 fracture. The patient presented with a delayed epidural hematoma and quadriparesis. The DAVF was successfully treated by coil embolization and the patient made a full recovery.

Imaging features of multifocal primary rhabdoid tumour of the central nervous system with meningeal and spinal metastases.

We present a 1-year-old boy with histologically proven multifocal rhabdoid tumour of the brain with meningeal and spinal metastasis. Although very rare and without specific radiological features, the possibility of rhabdoid tumour should be kept in mind when imaging paediatric intracranial and spinal neoplasms.

Angiomatosis in the neck and mediastinum: an example of low-flow vascular malformations.

A rare case of multiple low-flow vascular malformations in the larynx, neck and mediastinum - reported as angiomatosis in the literature - is described. Sonography, CT, angiography and MRI were performed in our case, followed by laryngoscopy with biopsies to establish the diagnosis. The radiological features and a review of relevant literature are briefly discussed.

MRI demonstration of orbital lipolysis in anorexia nervosa.

The purpose of this article is to describe the orbital changes due to lipolysis in anorexia nervosa. We examined a cachectic patient with MR imaging using T1-weighted images before and after contrast enhancement. Orbital fat edema has been observed in extreme forms of cachexia and the CT and MR findings have recently been reported.