نتایج جستجو برای: 3d imaging
تعداد نتایج: 623466 فیلتر نتایج به سال:
Introduction: Geometric distortion is a major shortcoming of magnetic resonance imaging (MRI), which has an important influence on the accuracy of volumetric measurements, an important parameter in neurology and oncology. Our goal is to design and construct a new three- dimensional phantom using a 3D printer in order to measure geometric distortion and its reproducibility in...
BACKGROUND Three-dimensional (3D) imaging mass spectrometry (MS) is an analytical chemistry technique for the 3D molecular analysis of a tissue specimen, entire organ, or microbial colonies on an agar plate. 3D-imaging MS has unique advantages over existing 3D imaging techniques, offers novel perspectives for understanding the spatial organization of biological processes, and has growing potent...
This article is intended to provide an overview of various aspects of clinical PET/CT. These include discussions of: (i) Important areas of clinical application; (ii) Opportunities in clinical research; (iii) Scanner and operating-mode considerations (e.g. BGO vs. LSO, LYSO or GSO scanners, 2D vs. 3D imaging). (iv) Study-specific considerations (e.g. patient preparation and positioning is...
This article reviews the various methods of three-dimensional (3D) imaging in orthodontics including the origin and history. Various technologies of 3D imaging applicable to the field of orthodontics such as Structured light ,Stereophotogrammetry, 3D Facial Morphometry, Dynamic stereometry, Laser scanning,Magnetic resonance imaging, Computed tomograghy, Cone beam computerized tomography.Present...
BACKGROUND Improved delineation of vascular structures is a common indication for cardiovascular magnetic resonance (CMR) in children and requires high spatial resolution. Currently, pre-contrast 3D, respiratory navigated, T2-prepared, fat saturated imaging with a bSSFP readout (3D bSSFP) is commonly used; however, these images can be limited by blood pool inhomogeneity and exaggeration of meta...
Background Improved delineation of vascular structures, including coronary arteries and pulmonary veins, is a common indication for CMR imaging in children and requires high spatial resolution given small structure sizes. Currently, pre-contrast 3D, respiratory navigated, T2 prepared, fat saturated imaging with a bSSFP readout (3D bSSFP) is commonly used; however, these images can have limitati...
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