The rapid widening of the mediastinal shadow is a very common radiological sign of acute aortic dissection1 2 and can suggest this condition in the proper clinical setting.3 In the presence of pericardial effusion, "bottle shape" configuration of the cardiac silhouette,4 straightening ofits contours,5 and acute cardiophrenic angles5 6 have been emphasised. Broadening of the mediastinal shadow h...

Primary bone lymphoma is an uncommon tumour accounting for approximately 4-5% of extra nodal lymphoma and less than 1% of all Non-Hodgkin's lymphoma. The radiographic appearance of primary bone lymphoma is variable. As lesions frequently resemble other disease processes namely chronic osteomyelitis and metastases, further imaging evaluation and histopathological examination allow early identifi...

Computed tomographic (CT) scann ing is very accurate in the recog nition of intracerebral hemorrhage. However, when radiographic contrast material has been administered, there may be confus ion between an unsuspected hematoma and an enhancing brain lesion . We recently encountered two cases of spontaneous hemorrhage occurring during the enhancement phase of the CT examination immediately after ...

Automatic segmentation of bone contours in knee x-ray images is investigated as a step towards reliable, quantitative radiographic analysis of osteoarthritis for diagnosis and assessment of progression. A double contour active shape model is proposed in order to simultaneously segment anterior and posterior contours of the tibial plateaux. Several features are compared for modelling local appea...

The correct interpretation of chest film on cardiac patients is very important. The most important feature is the radiographic appearance of the pulmonary vascularity. Four different patterns of pulmonary vascularity are considered: normal, decreased, increased and uneven. The different diseases associated with each type are mentioned. From the pulmonary vascular pattern one can deduct hemodyna...

The Subdural Evacuating Port System is a new device intended to simplify the treatment of subacute/chronic subdural hematomas. The appearance of the winged canula positioned with its tip in the diploic space overlying the subdural space should allow the radiologist to identify it correctly. Its radiographic features are described here to help the radiologist comment on appropriate placement, an...

The telangiectatic osteosarcoma (TGS), an extremely lytic and hemorrhagic variant of the osteosarcoma, presents in the same age group and location as a classical osteosarcoma but has a radiographic appearance almost identical to that of an aggressive aneurismal bone cyst, making diagnosis more complex. Here we are reporting a rare case of biopsy proven telangiectatic osteosarcoma in distal tibi...

Blastomycosis is endemic in river valley areas of the southeastern and Midwestern United States. Pulmonary manifestations include chronic cough and pleuritic pain. Radiographic appearance of the infection can mimic bronchogenic lung carcinoma. Pleural effusion is rarely associated with this pulmonary infection, and empyema has not been previously reported. We report a case of pulmonary and pleu...

Automatic segmentation of bone contours in knee x-ray images is investigated as a step towards reliable, quantitative radiographic analysis of osteoarthritis for diagnosis and assessment of progression. A double contour active shape model is proposed in order to simultaneously segment anterior and posterior contours of the tibial plateaux. Several features are compared for modelling local appea...

Two cases of intussusception of the appendix are reported--one caused by adenocarcinoma and adenomatous polyp and the other by an endometrioma. Appendiceal intussusception and adenocarcinoma are both uncommon entities and this is the first report of the two occurring concomitantly. Due to variable symptoms, the correct diagnosis of appendiceal intussusception has rarely been made preoperatively...