نتایج جستجو برای: spiral ct scan
تعداد نتایج: 200166 فیلتر نتایج به سال:
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...
PURPOSE To compare conventional and spiral CT studies of the larynx. METHODS Ten patients had both conventional and spiral CT studies of the neck using 5-mm section collimation and 5-mm increments. The spiral scans also were reconstructed at 2-mm increments. Five patients had two spiral CT larynx studies with 5-mm and 2-mm collimation. Two observers independently rated the visibility of laryn...
Although spiral computed tomography (CT) has certain advantages in other anatomic sites, particularly the thorax (1), abdomen (2, 3), and larynx (4), its advantages over conventional CT imaging in the orbit have been shown in only several clinical scenarios. Use of spiral CT in pediatric craniocervical imaging has been reported recently, with the advantages of shorter scanning time, less motion...
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....
Aim: To assess the response of clinicians and patient towards various imaging modalities used in diagnostic evaluation of dental implant therapy. Materials and Methods: 200 clinicians with more than 5 years of experience in implant dentistry were selected in study. Every clinician was requested to judge accessibility, maneuverability, accuracy, reproducibility, reliability, ease of understandin...
BACKGROUND Quantitative lung computed tomography (CT) provides fundamental information about lung aeration in critically ill patients. We tested a scanning protocol combining reduced number of CT slices and tube current, comparing quantitative analysis and radiation exposure to conventional CT. METHODS In pigs, CT scans were performed during breath hold in a model of lung injury with three di...
Background: Acute Necrotizing Mediastinitis (ANM) is a lethal disease that without antibiotic therapy and surgical Intervention has a mortality rate about 40% in best medical centers. With development of imaging technology (spiral CT- Scan) and shortening in time of diagnosis and surgery, the outcome and prognosis of the patients are improved. The surgical modalities are trans- cervical and tra...
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