Image contrast definition

Image contrast means the amount of radiographic density difference between adjacent areas resulting from a fixed amount of attentuation difference or light exposure difference.
Sample 1Sample 2Sample 3
Image contrast means the amount of radiographic density difference between adjacent areas re- sulting from a fixed amount of attenuation difference or light exposure difference.
Sample 1Sample 2Sample 3

Examples of Image contrast in a sentence

  • Image contrast shall permit differentiation of subtle tissue density differences.

  • Image contrast due to phase var- iations reduces more slowly than absorption contrast as photon energy increases thus suggesting that X-ray radiography could in the future be performed with a significantly reduced radiation dose.

  • Image contrast used in G is lower with respect to the one used in E.

  • Image contrast for: (a) steel plates of thickness varying from 2 mm, 3 mm, 4 mm, 5mm and 6 mm behind 100 mm, 200 mm 300 mm and 330 mm thick steel plates; (b) steel wires of length 250 mm, dia varying from 2 mm, 3 mm, 4 mm, 5mm & 6 mm behind 100 mm, 200 mm, 300 mm and 330 mm thick steel plates.

  • Image contrast and brightness shall be adjusted to minimize perceptible differences within and between adjacent images.

  • Image contrast within the correlation windows was expected to be as low as 0.5% for some of the proposed landing sites so even small dust particles could be a potential problem.Several different strategies were considered to mitigate the effect of dust artifacts on the DIMES algorithm.

  • A ROI, approximately 25 × 25- pixels was extracted from an occlusal surface area of sound enamel and a region within the composite and averaged to calculate the mean intensity from the respective regions Is and Ic. Image contrast was calculated using the equation (Ic-Is)/Ic. The image contrast varies from 0 to 1 with 1 being very high contrast and 0 having no contrast.

  • Image contrast immersion method for measuring refractive index applied to spider silks.

  • Instead, there could be a transition zone with intermediate objects such as arcades, light wells etc.

  • The Mayo QC team will perform the following measurements on the phantom data: Gradient Linearity Measurements, Signal to Noise measurements, Image contrast, Inhomogeneity, and RF Power measurements.

Related to Image contrast

  • embedded generator means a generator who is not a market participant and whose generation facility is connected to a distribution system of a distributor, but does not include a generator who consumes more electricity than it generates;

  • Single tomogram system means a CT x-ray system which obtains x-ray transmission data during a scan to produce a single tomogram.

  • Grab sample means an individual sample collected in less than 15 minutes in conjunction with an instantaneous flow measurement.

  • Switched Access Detail Usage Data means a category 1101xx record as defined in the EMI iconectiv Practice BR 010-200-010.

  • Fluoroscopic imaging assembly means a subsystem in which X-ray photons produce a visual image. It includes the image receptor(s) such as the image intensifier and spot-film device, electrical interlocks, if any, and structural material providing linkage between the image receptor and diagnostic source assembly.

  • Substrate means the surface onto which a coating is applied or into which a coating is impregnated.

  • Open type traction battery means a liquid type battery requiring refilling with water and generating hydrogen gas released to the atmosphere.

  • X-ray high-voltage generator means a device which transforms electrical energy from the potential supplied by the x-ray control to the tube operating potential. The device may also include means for transforming alternating current to direct current, filament transformers for the x-ray tube(s), high-voltage switches, electrical protective devices, and other appropriate elements.

  • Diameter at breast height (dbh) means the diameter of a tree at 4 1/2 feet above the ground measured from the uphill side.

  • Cabinet x-ray system means an x-ray system with the x-ray tube installed in an enclosure independent of existing architectural structures except the floor on which it may be placed. The cabinet x-ray system is intended to contain at least that portion of a material being irradiated, provide radiation attenuation, and exclude personnel from its interior during generation of radiation. Included are all x-ray systems designed primarily for the inspection of carry-on baggage at airline, railroad, and bus terminals, and in similar facilities. An x-ray tube used within a shielded part of a building, or x-ray equipment that may temporarily or occasionally incorporate portable shielding, is not considered a cabinet x-ray system.

  • Multiple tomogram system means a computed tomography X-ray system which obtains X-ray transmission data simultaneously during a single scan to produce more than one tomogram.

  • Process weight means the total weight of all materials introduced into any source operation. Solid fuels charged will be considered as part of the process weight, but liquid and gaseous fuels and combustion air will not.

  • Yearly (1/Year) sampling frequency means the sampling shall be done in the month of September, unless specifically identified otherwise in the effluent limitations and monitoring requirements table.

  • Sampler means a person who is employed by or is an owner of a licensed laboratory, grower, or processor and is authorized by that employer to collect samples in accordance with the testing laboratory's standard operating procedures and these Rules.

  • Customer-generator means a user of a net metering system.

  • Composite sample means a combination of individual samples of wastewater taken at 1 hour intervals, for eight (8) hours (or for the duration of discharge, whichever is less), to minimize the effect of variability of the individual samples. Individual samples must be of equal volume. (Example: one (1) liter per hour.)

  • Carrier Access Billing System (“CABS”) is the system which is defined in a document prepared under the direction of the Billing Committee of the OBF. The CABS document is published by Telcordia in Volumes 1, 1A, 2, 3, 3A, 4 and 5 as Special Reports SR-OPT-001868, SR-OPT-0011869, SR-OPT-001871, SR-OPT- 001872, SR-OPT-001873, SR-OPT-001874, and SR-OPT-001875, respectively, and contains the recommended guidelines for the billing of access and other connectivity services. Sprint’s carrier access billing system is its Carrier Access Support System (CASS). CASS mirrors the requirements of CABS.

  • Compression Ignition Engine means an internal combustion engine with operating characteristics significantly similar to the theoretical diesel combustion cycle. The regulation of power by controlling fuel supply in lieu of a throttle is indicative of a compression ignition engine.