نتایج جستجو برای: ct scanning
تعداد نتایج: 279445 فیلتر نتایج به سال:
OBJECTIVES Novel imaging modalities are currently available for the noninvasive evaluation of the tracheobronchial tree. This study was undertaken to compare the diagnostic potentials of conventional CT scanning, super high-resolution CT (SHR-CT) scanning, and virtual bronchoscopy (VB) directly with fiberoptic bronchoscopy (FB) for the detection of tracheobronchial neoplasms. DESIGN Prospecti...
Given the steep trajectory of evolution in multidetector CT technology and its complexity, dose reduction efforts require knowledge of interplay between CT scanning parameters and their impact on radiation dose and image quality in CT examinations. We describe the effects of modifying primary scanning factors such as tube current, tube potential, and pitch factor (applicable to helical CT scann...
In this chapter we will review the use of x-ray computed tomography (CT) scanning in the field of archaeology. The story will be told in roughly chronological order, starting with the first reported use of a CT scanner in the field of archaeology and then look at some some possibilities for the future. Since the introduction of the x-ray CT scanner in the 1970’s the quality of the images has st...
Laryngocoele is a well known but uncommon condition in Otolaryngology. CT scanning is superior to other imaging modalities in establishing the diagnosis, delineating the anatomy and aiding in the management. A case is presented with a review of the literature.
Concerns have been raised over alleged overuse of CT scanning and inappropriate selection of scanning methods, all of which expose patients to unnecessary radiation. Thus, it is important to identify clinical situations in which techniques with lower radiation dose such as plain radiography or no radiation such as MRI and occasionally ultrasonography can be chosen over CT scanning. This article...
Background: Computed tomography (CT) scanning has become essential in the early diagnostic phase of trauma care because of its high diagnostic accuracy. The introduction of multi-slice CT scanners and infrastructural improvements made total-body CT scanning technically feasible and its usage is currently becoming common practice in several trauma centers. However, literature provides limited ev...
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