Mediastinal epidermoid cyst is a rare condition that is considered as a congenital disorder. Various manifestations from asymptomatic cases to serious symptoms may be found in these patients. However, some cases may be diagnosed incidentally. Here, we report an old man with recurrent pneumonia who demonstrated symptoms of respiratory distress and chest pain. The high resolution computed tomogra...

In this paper, we address bronchi segmentation in high resolution computerized tomography (HRCT) in order to estimate the bronchial caliber. The method developed is based on mathematical morphology theory, and relies on morphological filtering, marking techniques derived from the concept of connection cost, and conditional watershed. In order to evaluate the robustness of the segmentation and t...

In this article we present a 53-year-old lady, who had progressive indurated skin lesions on her both forearms since 3 months ago, without skin discoloration. Chest x-ray showed parahilar lymphadenopathy, in high resolution CT (HRCT) scan evaluation multiple lymph nodes in upper and middle mediastinum were reported. Angiotensin converting enzyme (ACE) level was increased to 81 (normal 5-5...

We have developed an algorithm for the rigid-body registration of a 3D CT to a set of C-arm images by matching them to computed cone-beam projections of the CT (DRRs). We precomputed rescaled versions (pyramid) of the CT volume and of the C-arm images. We perform the registration of the CT to the C-arm images starting from their coarsest resolution until we reach some finer resolution that offe...

combined pet/ct scanners now play a major role in medicine for in vivo imaging in oncology, cardiology, neurology, and psychiatry. as the performance of a scanner depends not only on the scintillating material but also on the scanner design, with regards to the advent of newer scanners, there is a need to optimize acquisition protocols as well as to compare scanner performances on an objective ...

purpose: to compare the efficacy of intravitreal clindamycin and dexamethasone with classic treatment for ocular toxoplasmosis. methods: in this prospective, randomized single-masked clinical trial a total of 68 patients with active ocular toxoplasmosis were assigned randomly to 2 treatment groups: 34 in the intravitreal clindamycin plus dexamethasone (ivcd) group and 34 in the classic treatmen...

To satisfy the heterogeneous needs of X-ray CT users, flexible solutions are required both from the hardware and software point of view. The use of synchrotrons and microfocus X-ray sources present complementary approaches being characterized by different properties in terms of achievable spatial resolution, field of view and image contrast. The main aim of this event was to bring together expe...