Items tagged “physics”
132 results found
Article
Gamma decay
Gamma decay refers to the release of a gamma (γ) ray photon, a form of high energy electromagnetic radiation, due to radioactive decay of a nucleus. Typically, the energy spectra is in the ~100 keV to ~10 MeV range 1.
Gamma decay
Gamma decay is a mode of radioactive decay. It differs from alph...
Case
X-ray tube diagrams
Published
13 Jul 2020
22% complete
Diagram
Case
Cross-excitation artifact (MRI)
Published
15 Jun 2021
77% complete
MRI
Article
Bernoulli equation (physics)
The Bernoulli equation utilizes the assumptions delineated in the law of conservation of energy to calculate a pressure gradient between two points from a velocity 1. In its simplified form, discussed below, it is often used to quantify severity of valvular derangements in echocardiography.
Phy...
Article
Double emulsion film
Double emulsion film is a type of x-ray film that contains emulsion on both sides of the base. They have a thin layer of emulsion on both sides to absorb light from the front and back of the intensifying screen. Both emulsions contribute to the overall radiographic density of the film. They usua...
Article
Coandă effect (physics)
The Coanda effect refers to the phenomenon by which a narrow jet of liquid (or air) passing through an orifice directly in sequence with a solid (especially convex) surface will deviate from its path and adhere to this curved surface, following its shape in parallel.
The mechanism is thought to...
Case
Intensifying screen layers
Published
09 Apr 2023
29% complete
Diagram
Article
Characteristic curve
The characteristic curve, also known as the H and D curve, is a representation of the response of a screen film radiograph to light. The characteristic curve represents the change in optical density (OD) of the screen film in response to changing exposures (incident x-rays on the screen film).
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Case
X-ray film layers
Published
23 Apr 2023
29% complete
Diagram
Case
Gamma camera structure
Published
19 Aug 2023
22% complete
Article
Intravoxel incoherent motion
Intravoxel incoherent motion (IVIM) is a technique used in diffusion MRI to measure translational movements of water molecules within a voxel.
IVIM-based perfusion MRI does not require the injection of any tracer or contrast agent. IVIM is a concept and method used in diffusion MRI to assess ...
Case
Beam hardening streaking artefact
Published
30 Dec 2023
95% complete
CT
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