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A high-density range means that the scanner is able to record shadow details and brightness details in one scan. Density of film is measured on a base 10 log scale and varies between 0.0 (transparent) and 5.0, about 16 stops. [65] Density range is the space taken up in the 0 to 5 scale, and Dmin and Dmax denote where the least dense and most ...
A high-density line-scan solid state detector is composed of a photostimulable barium fluorobromide doped with europium (BaFBr:Eu) or caesium bromide (CsBr) phosphor. The phosphor detector records the X-ray energy during exposure and is scanned by a laser diode to excite the stored energy which is released and read out by a digital image ...
A real-time scanner using digital fringe projection and phase-shifting technique (certain kinds of structured light methods) was developed, to capture, reconstruct, and render high-density details of dynamically deformable objects (such as facial expressions) at 40 frames per second. [27] Recently, another scanner has been developed.
Low-dose high-resolution (1.25 mm) chest CT. HRCT is performed using a conventional CT scanner. However, imaging parameters are chosen so as to maximize spatial resolution: [1] a narrow slice width is used (usually 1–2 mm), a high spatial resolution image reconstruction algorithm is used, field of view is minimized, so as to minimize the size of each pixel, and other scan factors (e.g. focal ...
It was the cheapest scanner on the market to scan in 30-bit color at the time of its release. [42] The ScanJet 3c also increased the maximum native resolution of the scanning element to 600 dpi. [43] [44] The ScanJet's hardware PDI is capable of upscaling the 600-dpi image to simulate up to 4800 dpi.
This appears as "blurring" of edges. It is due to the scanner being unable to differentiate between a small amount of high-density material (e.g., bone) and a larger amount of lower density (e.g., cartilage). [130] The reconstruction assumes that the X-ray attenuation within each voxel is homogeneous; this may not be the case at sharp edges.
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