Objectives: Presence/absence of cervical lymph node metastasis plays a critical role in prognosis and survival of patients with oral squamous cell carcinoma (SCC). This study was designed to assess the diagnostic accuracy of computed tomography (CT) scan for detection of cervical lymph node metastasis in oral SCC in comparison with histopathological analysis after neck dissection Methods: In...

methods multidetector ct-scan and explorative laparotomy of the patients with blunt abdominal trauma were assessed retrospectively. characteristics of the injuries were categorized on the basis of the american association for the surgery of trauma (aast) grading system and the findings were analyzed using kappa test. results the findings of 35 patients were analyzed. according to the kappa test...

Post stroke dementia is one of the most common complications of stroke that is preventable and relatively treatable too. The purpose of the study is comparison between the positive findings in brain CT scan and brain perfusion SPECT. 15 patients who were complicated by dementia after cerebrovascular accident and also 5 patients as a control group enrolled in this study. Brain CT scan and ...

This research aims at developing a fully automatic ComputerAssisted Diagnosis (CAD) system for lung cancer screening using chest spiral CT scans. One thousand subjects are enrolled in a chest cancer screening program in Louisville, KY, USA, which aims at quantification of the effectiveness of low dose spiral CT scans for early diagnosis of lung cancer, and evaluating its possible impact on impr...

Pleuramesothelioma is a malignant tumor of the pleura. It evolves from pleural thickenings which are a typical long-term effect of asbestos exposure. A diagnosis is performed by examining CT scans acquired from the patient’s lung. The analysis of the image data is a very time-consuming task and is subject to strong interand intra-reader variances. To objectivize the analysis and to speed-up the...

Fast variance prediction for iteratively-reconstructed helical CT images is useful for analysis of resulting images and potentially for dynamic dose adjustment during a scan. Previous methods require impractical computation times to approximate the image variance; other methods are able to approximate variance quickly but only for specific CT geometries, excluding 3D helical CT. In this paper w...

Perfusable tissue index (PTI) is a marker of myocardial viability and requires acquisition of transmission, [O]CO and [O]H2O scans. The aim of this study was to generate parametric PTI images from a [O]H2O PET/CT scan without an additional [O]CO scan. Methods: Data from 20 patients undergoing both [O]H2O and [ O]CO scans were used, assessing correlation between PTI based on [O]CO (PTICO) and on...

conclusions performing routine chest and abdominopelvic ct-scan in conscious blunt trauma patients decreases the hospitalization time but has no effect on patient complications and final outcome. using a selective approach and performing ct-scan only for symptomatic patients, would be an appropriate option to decrease radiation dose and facility overuse. nevertheless, the concern of missing occ...

BACKGROUND Injury to facial soft tissues as a complication of skeleton fractures is an important problem among patients with facial trauma. The aim of this work was to assess the value of multiplanar and three-dimensional (3D) reconstruction computed tomography (CT) images obtained by using multi-detector row technology in spiral data acquisition in patients with facial injuries of soft tissue....