Proton-density Fat-suppressed
Proton-density Fat-suppressed - Related Videos
01:13
Acid Suppressive Drugs for Peptic Ulcer Disease: Proton Pump Inhibitors
0 Views •
2024
Peptic ulcers, often induced by H. pylori infections or NSAID usage, arise from disruptions in the delicate balance of gastric acid production. Peptic ulcers stem from heightened gastric acid levels due to H. pylori infections or NSAID use. The protective mucus layer diminishes in the presence of these factors, allowing gastric acid to erode the stomach lining and form ulcers. Gastric acid, a potent cocktail of hydrogen and chloride ions, is produced in specialized parietal cells within the...
09:40
Proton Exchange Membrane Fuel Cells
0 Views •
2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University The United States consumes a large amount of energy – the current rate is around 97.5 quadrillion BTUs annually. The vast majority (90%) of this energy comes from non-renewable fuel sources. This energy is used for electricity (39%), transportation (28%), industry (22%), and residential/commercial use (11%). As the world has a limited supply of these non-renewable sources, the United States (among others) is...
08:34
The Measurement and Treatment of Suppression in Amblyopia
0 Views •
Cited by 54 •
2012
Amblyopia is a developmental disorder of the visual cortex that is often accompanied by strong suppression of one eye. We present a new technique for measuring and treating interocular suppression in patients with amblyopia that can be deployed using virtual reality goggles or a portable iPod Touch device.
07:19
Determining the Density of a Solid and Liquid
0 Views •
2023
Source: Laboratory of Dr. Michael Evans — Georgia Institute of Technology The ratio of the mass of a substance to its volume is known as the mass density or, simply, the density of the substance. Density is expressed in units of mass per volume, such as g/mL or kg/m3. Because the density of a substance does not depend on the amount of substance present, density is an “intensive property”. To measure the density of a sample of material, both the mass and volume of the sample must be determined.
05:57
Fat Preference: A Novel Model of Eating Behavior in Rats
0 Views •
Cited by 9 •
2014
Dietary fat content influences both energy intake and body fat composition in mammals. By examining rats’ preference for high fat food in a series of choice experiments, it is possible to test genetic differences and pharmacological interventions on their preference for high fat food.
FAQs
A relatively long repetition time reduces the influence of T1 relaxation, while a short echo time limits T2-related contrast. Together, these timing choices make signal differences more dependent on mobile hydrogen proton concentration. This approach helps the sequence display tissue composition and abnormalities without strongly emphasizing either major relaxation mechanism.
The frequency-selective radiofrequency pulse targets the signal associated with fatty tissue before image acquisition. Reducing that signal increases the visual distinction between fat and structures containing fluid or other mobile protons. As a result, edema, cartilage, tendons, ligaments, and related soft-tissue abnormalities can become more conspicuous on the acquired images.
Proton-density emphasis prioritizes differences in mobile hydrogen proton concentration while the chosen timing minimizes T1 and T2 weighting. This produces a contrast approach that is distinct from sequences designed primarily around relaxation differences. In musculoskeletal imaging, that balance supports detailed assessment of soft tissues whose abnormalities may be subtle or structurally localized.
The sequence is especially useful for examining cartilage, tendons, ligaments, fluid-containing regions, and areas of soft-tissue edema. Suppressing fatty signal improves the visibility of these structures and their abnormalities. This makes the technique valuable when the clinical question concerns internal derangements or subtle structural injury rather than only gross changes in anatomy.
Proton-density Fat-suppressed imaging can support evaluation when trauma, inflammation, or a subtle structural injury is suspected. Its contrast improves visualization of fluid and edema against surrounding fatty tissue, helping reveal abnormalities that may be difficult to appreciate when fat remains prominent. The sequence therefore contributes useful soft-tissue information within a broader musculoskeletal MRI examination.
By reducing fatty signal and emphasizing mobile-proton differences, the images can show abnormalities involving cartilage, tendons, ligaments, and related soft tissues. That information helps characterize internal derangements and small structural changes in musculoskeletal anatomy. Its value lies in improving the visibility of tissue injury, inflammation, or edema rather than providing a standalone diagnosis.