Background: In intensity modulated radiation therapy, cone beam computed tomography (CT) has been used to evaluate patients prior to treatment. This study conducted a comparative evaluation of the image reconstruction ability of the clinically used half-fan bowtie filter and the full-fan bowtie filter. Materals and Methods: A CT simulation marker was inserted inside a human phantom, and the pel...

Abstract Aims and objectives: Pneumothorax is a common finding after trauma and with a wide range of clinical manifestations, from a concealed pneumothorax detectable only by a CT scan accidentally, to a potentially fatal tension pneumothorax. Pneumothorax can gradually progress to tension pneumothorax and become an emergency, consequently, a timely diagnosis is essential. Most traumatic patie...

background: computed tomography (ct) scan is one the most useful devices in chest imaging. ct scan can be used in mediastinal abnormality, lungs, and pleural evaluations. according to the high prevalence and different causes of pulmonary nodules, we designed this study to evaluate the prevalence and the types of pulmonary nodules in noncancerous patients who underwent chest multi-detector ct (m...

The interpretation of ultrasonic B-Scan images can be a time consuming process, its success is also very dependant on operator skill sand experience [1]. Removal of the image background will potentially improve its quality and hence improve operator diagnosis. An automatic background noise removal algorithm is proposed enabling the highlighting of defects and aiding the operator in the location...

hepatosplenic candidiasis is a fungal infection, which mostly affects patientswith hematologic malignancies such as leukemia. the pathogenesis of thisinfection is not clear yet, and the liver is the most commonly affected organ.diagnosis of hepatosplenic candidiasis can be only established via biopsy,since computed tomography (ct) scan, ultrasonography, and magneticresonance imaging (mri) yield...

background: this prospective study was conducted to evaluate and compare the efficacies of nasopharyngoscopy and ct scan in the diagnosis of local failure of external beam radiotherapy (ebrt) for nasopharyngeal carcinoma. methods: total 52 patients of histopathologically proven nasopharyngeal carcinoma treated with external beam radiotherapy (ebrt), were included in this study. for every patien...