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...

Introduction: Our aim was to determine the incidence and spectrum of significant alternate or incidental diagnoses established or suggested on spiral computed tomography (CT) in a large series of patients with suspected renal colic. Materials and Methods: Records of all patients that had undergone spiral CT (5-mm to 7-mm slice thickness) for acute flank pain during a 5-year period were reviewed...

Material-method: twenty-two patients, aged 22-67 are presented. They were admitted in the outpatient department of our hospital with clinical and laboratory findings suggestive of acute appendicitis. All patients were examined by CT after the oral administration of contrast material. The imaging findings were confirmed intraoperatively. Results: a common imaging finding in all patients that wer...

INTRODUCTION This paper evaluates the usefulness of spiral CT and conventional radiographs in the assessment of cervical spine injuries in polytrauma patients. The data are used as a basis for determining a precise and quick method for the assessment of the severity of cervical spine injuries that is also possibly least inconvenient for the patient.This approach is important due to the high ris...

In spiral computed tomography (CT), dose is always inversely proportional to pitch. However, the relationship between noise and pitch (and hence noise and dose) depends on the scanner type (single vs multi-detector row) and reconstruction mode (cardiac vs noncardiac). In single detector row spiral CT, noise is independent of pitch. Conversely, in noncardiac multi-detector row CT, noise depends ...

OBJECTIVE To compare the clinical utility of the different imaging techniques used for the evaluation of tracheobronchial diseases. MATERIALS AND METHODS Forty-one patients with tracheobronchial diseases [tuberculosis (n = 18), bronchogenic carcinoma (n = 10), congenital abnormality (n = 3), post-operative stenosis (n = 2), and others (n = 8)] underwent chest radiography and spiral CT. Two se...

PURPOSE The purpose of this study was to determine the utility of spiral CT in the diagnosis of brain death. METHODS Spiral CT was evaluated prospectively in 14 brain-dead patients and in 11 healthy subjects. A two-phase protocol was used. Twenty seconds after intravenous injection of a nonionic iodinized contrast medium, the CT table was drawn through the gantry at a rate of 10 mm/s while sc...

Conventional CT scan the scan is taken slice by slice and after each slice the scan stops and moves down to the next slice eg, from the top of the abdomen down to the pelvis. This requires patients to hold their breath to avoid movement artefact. Spiral/helical CT scan this is a continuous scan which is taken in a spiral fashion. It is a much quicker process and the scanned images are contiguous.

Conventional CT scan the scan is taken slice by slice and after each slice the scan stops and moves down to the next slice eg, from the top of the abdomen down to the pelvis. This requires patients to hold their breath to avoid movement artefact. Spiral/helical CT scan this is a continuous scan which is taken in a spiral fashion. It is a much quicker process and the scanned images are contiguous.

A sound knowledge of the normal tooth morphology and its numerous variations is essential to the success of endodontic therapy. While extra canals and lateral canals are routinely encountered and documented, there also exists the rare possibility of a fewer number of canals than normal. Early detection of such an occurrence is critical to the prevention of iatrogenic errors during endodontic tr...