hydrogen density

hydrogen density

An MRI term for the concentration of hydrogen atoms in water or in certain fat molecules within tissue. Initial MR signal amplitudes are directly related to the H+ density in the imaged tissue.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
The match was evident when the hydrogen density in interstellar space was of the order of magnitude of one atom per cubic centimeter.
This is particularly due to the gravimetric and volumetric hydrogen density requirements in order to achieve a 300 mile cruising range.
(4) to within 0.01 % from 220 K to 1000 K with pressures up to 70 MPa, and from 255 K to 1000 K with pressures up to 120 MPa, although the estimated uncertainty of the resulting hydrogen density is 0.04%.
The telescope called the Canadian Hydrogen Intensity Mapping Experiment, or CHIME, uses the digitized signals it collects to create a three dimensional map of hydrogen density to measure the expansion of the universe, (https://chime-experiment.ca/location) according to the CHIME website.
Beginning with the hydrogen density at the initial temperature and pressure, the tank is sized and the wall and dome thicknesses are calculated to estimate the composite tank mass and volume.