pulmonary embolism is considered as a great masquerader due to its frequent nonspecific signs and symptoms. typically pulmonary embolism is under-diagnosed or over-diagnosed. in this study a patient with pulmonary embolism is reported in which the patient exhibited two unusual manifestations namely; right upper quadrant abdominal pain and st-t elevation in anterior precordial leads. due to the ...

introduction : one of the key factors in successful endodontic therapy is to adequately fill the root canals. the aim of this in vitro study was to compare the quality of four different root canal obturation techniques: cold lateral condensation (clc), warm vertical condensation (wvc), obtura ii (oii) and gutta flow (gf) by using micro-computed tomography (micro ct). materials and methods: a to...

In this paper, the three-dimensional geometry of the human cochlea is modeled by the helico-spiral seashell model. The 3-D helico-spiral model, the generalized representation of the Archimedian spiral model, provides a framework for measuring cochlear features based on consistent estimation of model parameters. Nonlinear least square minimization based algorithms are developed for the identific...

The introduction of spiral technology to computed tomography (CT) scanners in the late 1980s has revolutionised the field ofCT. Spiral CT offers definite practical benefits over conventional scanners and has expanded the role of CT through the development of new scanning techniques. CT scanning now rivals magnetic resonance imaging in many areas of investigation, and for some situations is the ...

L ast year, the New England Journal of Medicine ran a lead article reporting that patients with lung cancer had a 10-year survival approaching 90% if detected by screening spiral computed tomography. The publication garnered considerable media attention, and some felt that its findings provided a persuasive case for the immediate initiation of lung cancer screening. We strongly disagree. In thi...

We present the case of a 28-year-old woman admitted to our department with respiratory distress, profound hypotension, and tenderness in the left upper abdominal quadrant and left calf. Ultrasound examination revealed left lower extremity thrombus as well as a floating thrombus in the right atrium attached to a patent foramen ovale. Spiral computed tomography revealed bilateral pulmonary artery...

In this chapter we will study the differential structure of discrete images in detail. This is the structure described by the local multi-scale derivatives of the image. We start with the development of a toolkit for the definitions of heightlines, local coordinate systems and independence of our choice of coordinates. << FrontEndVision`FEV`; Off@General::spellD; Show@Import@"Spiral CT abdomen....

We evaluated exposed-radiation doses on dual-source cardiac computed tomography (CT) examinations with prospective electrocardiogram (ECG)-gated fast dual spiral scans. After placing dosimeters at locations corresponding to each of the thoracic organs, prospective ECG-gated fast dual spirals and retrospective ECG-gated dual spiral scans were performed to measure the absorbed dose of each organ....

BACKGROUND AND PURPOSE Both initial hematoma volume and hematoma growth are independent predictors of clinical outcomes and mortality among intracerebral hemorrhage patients. The purpose of this study was to evaluate the accuracy of different computed tomography image acquisition protocols and hematoma volume measurement techniques. METHODS We used plastic and cadaveric phantoms to determine ...