THE TECHNICAL PROBLEMS IN COMPUTED TOMOGRAPHY (CT)

Computed Tomography (CT) Perfusion in Abdominal Cancer: Technical Aspects

Computed Tomography (CT) Perfusion is an evolving method to visualize perfusion in organs and tissue. With the introduction of multidetector CT scanners, it is now possible to cover up to 16 cm in one rotation, and thereby making it possible to scan entire organs such as the liver with a fixed table position. Advances in reconstruction algorithms make it possible to reduce the radiation dose fo...

Lung Lesions Biopsy in Children by Computed Tomography (CT) Fluoroscopy Guided Versus Conventional CT Scan Guided

Abstract Background Computed tomography (CT)-guided biopsy of the lung is a well-established method of diagnosis. The aim of this study was to determine the success rate of fluoroscopic CT (FCT) and conventional CT (CCT) in needle navigation biopsies from the lung lesions. Materials and Methods A total of 78 patients were prospectively enrolled to receive CT-guided biopsy with (group I, n=2...

Mathematical Problems in Computed Tomography

Thorax organ dose estimation in computed tomography based on patient CT data using Monte Carlo simulation

Background:  This study presents patient specific and organ dose estimation in computed tomography (CT) imaging of thorax directly from patient CT image using Monte Carlo simulation.  Patient's CT image is considered as the patient specific phantom and the best representative of patient physical index in order to calculate specific organ dose. Materials and Methods: EGSnrc /BEAMnr...

The Clinical Applications of Single-photon Emission Computed Tomography and Computed Tomography (spect/ct) in Oncology

The accurate evaluation of a tumor’s stage is one of the most important steps for successful treatment. Radionuclide imaging, now widely used, is useful because it may reflect not only morphological characteristics but also metabolic activities. Conventional imaging techniques can provide anatomical information, necessary for the accurate detection and localization of structural and morphologic...