mediastinal teratomas are usually asymptomatic tumors, located most commonly in the anterior mediastinum. very rarely, such tumors may rupture into the tracheobronchial tree, lung, pleura or pericardium. computed tomography (ct) is helpful in the diagnosis and differentiation of ruptured and unruptured tumors. we report a case of ruptured anterior mediastinal teratoma in a 20-year-old female pr...

conclusions both eps and er residents either missed or falsely called a significant number of pathologies in their interpretations. the interpretations of eps and er residents were more sensitive and more specific, respectively. these findings revealed the need for increased training time in head ct reading for residents and the necessity of attending continuing medical education workshops for ...

introduction: motion artifacts are a common problem in pediatric radiographic studies and are a common indication for pediatric procedural sedation. this study aimed to compare the combination of oral midazolam and ketamine (omk) with oral midazolam alone (om) as procedural sedatives among children undergoing computed tomography (ct) imaging. methods: the study population was comprised of six-m...

Current computed tomography (CT) scanners, including micro-CT scanners, utilize a point x-ray source. As we target higher and higher spatial resolutions, the reduced x-ray focal spot size limits the temporal and contrast resolutions achievable. To overcome this limitation, in this paper we propose to use a line-shaped x-ray source so that many more photons can be generated, given a data acquisi...

X-ray tube arcing in computed tomography scanners causes poor image quality. During the time that the X-ray tube recovers to full voltage after an arc, image data is being collected. Normally this data, acquired at less than full voltage, is discarded and interpolation is performed over the arc duration. We have developed an algorithm that corrects for improper tube voltage, allowing previously...

hydatid disease (hd) is a parasitic infection that is most commonly caused by the larval stage of echinococcus granulosus. unusual location for this disease can cause diagnostic and therapeutic problems. we herein report a case of sacrococcygeal hd at an unusual location in a 30-year-old woman. she was evaluated using computed tomography (ct) imaging and magnetic resonance imaging (mri) after t...

gorlin-goltz syndrome (ggs) consists of ectodermal and mesodermal abnormalities. in this case report we will investigate lower extremity lesions of ggs. a 52-year-old man with ggs underwent skull and lower extremity computer tomography. radiographic findings included cervical spondylosis, transparent areas with slurred margins, and cerebral falx calcification. tibial and fibular specific cortic...

primary small cell carcinoma of the ureter is an extremely rare disease, only several cases have been reported worldwide so far. we report a 70-year-old woman who was examined with intravenous urography and abdominal computed tomography and was diagnosed as small cell carcinoma confirmed by pathology. we describe and discuss the urography and computed tomography findings of this case.

introduction one of the central questions in radiological protection is the magnitude of the risks from low doses of radiation, related to the justification and optimization of the diagnostic medical exposures. therefore, the aim of this study was to estimate the cancer incidence and mortality risks in children of different ages, sizes, and ethnicities undergoing computed tomography examination...

background: a solitary necrotic nodule (snn) of the liver is an uncommon lesion, which is different from primary and metastatic liver cancers. objectives: to analyze the classification, ct and mr manifestation, and the pathological basis of solitary necrotic nodule of the liver (snn) in order to evaluate ct and mri as a diagnosing tool. patients and methods: this study included 29 patients with...