One-hundred-and-twenty-eight-section dual X-ray source computed tomography (CT) systems have been introduced into clinical practice and have been shown to increase temporal resolution. Higher temporal resolution allows low-dose spiral mode at a high pitch factor during CT coronary angiography. We evaluated radiation dose and physical image qualities in CT coronary angiography by applying high-p...

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....

OBJECTIVE To prospectively evaluate the diagnostic accuracy of spiral computed tomography (CT) versus ventilation/perfusion (V/Q) scanning in the examination of patients clinically suspected of having pulmonary embolism (PE). PATIENTS AND METHODS Sixty-three patients, presenting to the emergency department and departments of radiology and nuclear medicine of a large hospital, highly suspected...

OBJECTIVE Pulmonary embolism is a major cause of maternal death. The work up for suspected pulmonary embolism is complex, with many potential diagnostic options. We performed a cost analysis to evaluate which of several diagnostic strategies was the most cost-effective with the least number of deaths from pulmonary embolism. STUDY DESIGN We created a decision tree to evaluate the following st...

A 39 year old man presents with a swelling in his neck that has been progressively enlarging over the last few months. 1. What clinical tests would you perform to assess him? 2. The swelling moves upwards when the tongue is protruded. What is the likely cause, and how common is this condition? 3. Describe the embryological origin of the thyroid and its significance in this case. A representativ...

We report a case of 50-year-old man who was presented with recurrent episodes of left sided hemiparesis. CT scan and MRI brain revealed a large intraventricular fatty lesion. Histopathological examination showed a picture of angiolipoma.

BACKGROUND Chronic otitis media (COM) can be treated with tympanoplasty with or without mastoidectomy. In patients who have undergone middle ear surgery, three-dimensional spiral computed tomography (CT) scan plays an important role in optimizing surgical planning. OBJECTIVES This study was performed to compare the findings of three-dimensional reconstructed spiral and conventional CT scan of...