نتایج جستجو برای: spiral computed tomography
تعداد نتایج: 284108 فیلتر نتایج به سال:
With the introduction of conebeam computed tomography (CBCT) in the early 2000s, oral and maxillofacial radiology fully entered the modern world of 3-dimensional (3D) radiographic imaging. Although conventional or medical computed tomography (CT) had been available since the 1970s, with few exceptions, it had not been widely used in dentistry. In the early days of conventional CT, the machines ...
PURPOSE Evaluation of a new software tool for generation of simulated low-dose computed tomography (CT) images from an original higher dose scan. MATERIALS AND METHODS Original CT scan data (100 mAs, 80 mAs, 60 mAs, 40 mAs, 20 mAs, 10 mAs; 100 kV) of a swine were acquired (approved by the regional governmental commission for animal protection). Simulations of CT acquisition with a lower dose ...
Computed Tomography (CT) with three-dimensional reconstructions was studied in cranio-facial deformities. The pre-operative and follow-up study of cranio-facial deformities can be performed with spiral CT. With this modality quantitative information can be provided in order to measure the entity of airway obstruction and the result of procedure affecting bone structures.
One strategy was compression ultrasonography, followed by anticoagulation in case of positive results (high probability ventilation-perfusion (VQ) scans) or by VQ scan or spiral computed tomography (CT) in case of negative results. Low probability VQ scans resulted in no treatment, whereas high probability VQ scans resulted in anticoagulation. Intermediate tests were followed by a second test (...
Postoperative hypoxemia can be a challenging diagnostic and management dilemma for the clinician. We present here a case of postoperative hypoxemia following laparoscopic gastric bypass surgery secondary to presumed pulmonary embolism complicated with a patent foramen ovale. The diagnostic pitfalls associated with a negative spiral computed tomography scan and the impact of coexisting medical c...
tion has been widely used for managing coronary artery occlusive disease. However, the risk of in-stent restenosis is about 10-40%, as determined on the angiographic follow-up at 6 months, and this remains a clinical issue in cardiology (1-3). Early identification of in-stent restenosis is important to reduce the number of recurrent ischemic episodes and to prevent myocardial infarction, thereb...
One strategy was compression ultrasonography, followed by anticoagulation in case of positive results (high probability ventilation-perfusion (VQ) scans) or by VQ scan or spiral computed tomography (CT) in case of negative results. Low probability VQ scans resulted in no treatment, whereas high probability VQ scans resulted in anticoagulation. Intermediate tests were followed by a second test (...
Until recently, conventional magnetic resonance (MR) imaging of the pancreas was limited by motion artifacts (respiratory, vascular, and bowel peristaltic) and poor spatial resolution. Recent technique innovations in MR imaging hardware and software (fast imaging) have allowed these problems to be overcome with acquisition images similar to those obtained with spiral computed tomography (CT) (F...
During this presentation, the most current post processing techniques available for CT angiography will be reviewed. The audience will understand the application of these tools for optimal image interpretation. Imaging and workflow protocols will be introduced, with the emphasis on improving patient care, as part of a multidisciplinary team.
UNLABELLED Cone-beam CT is an exciting development in dental and maxillofacial imaging. This article gives an overview of the subject and discusses some of the implications for dental practitioners. CLINICAL RELEVANCE Dentists should be aware of technological advances that potentially are going to have major implications on their practice. They should have knowledge of the indications, limita...
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