In medical imaging, an anti-scatter grid is a device for limiting the amount of scattered radiation reaching the detector, thereby improving the quality of diagnostic medical x-ray images.
Example: An anti-scatter grid was used by the technologist for the exam.
en: grille anti-diffusion
attenuation
noun
The reduction of the force, effect, or value of something.
Example: Estimating the Thickness of the Crystal The ATTENUATION of a collimated beam of radiation of flux passing through a medium of thickness t and emerging with flux is governed by the equation Equation 9 where , the ATTENUATION coefficient, is characteristic of the absorber and the photon energy.
en: atténuation
calcification
noun
The hardening of tissue or other material by the deposition of or conversion into calcium carbonate or some other insoluble calcium compounds.
Example: In the latter, creamy necrotic material may exude from the cut surface of the breast and may allow mammographical detection if CALCIFICATION has occurred.
en: calcification
collimation
noun
The restriction of the X-ray beam to a specific area of interest using lead shutters.
A contrast agent (or contrast medium) is a substance used to increase the contrast of structures or fluids within the body in medical imaging.
Example: The patient drank contrast before the scan.
en: agent de contraste
dosimeters
noun
A device used to measure an absorbed dose of ionizing radiation.
Example: Dosimeters helps ensure radiation safety in medical imaging.
en: dosimètres
Fluoroscopy
noun
Fluoroscopy is an imaging technique that uses X-rays to obtain real-time moving images of the interior of an object.
Example: The doctor used fluoroscopy to guide the catheter during the procedure.
en: Fluoroscopie
kilovolts
noun
The maximum voltage applied to the X-ray tube, which controls the energy and penetration of the X-ray beam.
Example: Increasing the kilovolts allows X-rays to penetrate thicker body parts.
en: kilovolts
magnetic resonance imaging MRI
noun
Magnetic Resonance Imaging (MRI) is a non-invasive imaging technology that produces three dimensional detailed anatomical images.
Example: The promising research supporting the use of MRI for screening was also examined and hopefully this will provide a method for assessing younger high-risk populations in the future.
en: imagerie par résonance magnétique (IRM)
myelogram
noun
Myelography is a type of radiographic examination that uses a contrast medium to detect pathology of the spinal cord, including the location of a spinal cord injury, cysts, and tumors.
Example: A myelogram was performed to detect any compression or blockage in the spine.
en: myélogramme
pixel
noun
A minute area of illumination on a display screen, one of many from which an image is composed.
Example: More pixels improve image detail.
en: pixel
radiolucent
adjective
Transparent to X-rays.
Example: Air is radiolucent, so it appears black on an X-ray.
en: radiotransparent
radiopaque
adjective
(of a substance) opaque to X-rays or similar radiation.
Example: Metal implants appear radiopaque on radiographs.
en: radio-opaque
scattered Radiation
noun
A form of secondary, lower-energy ionizing radiation produced when a primary X-ray beam interacts with matter (usually a patient's body) and deflects in multiple directions.
Example: Scattered radiation is bad for image quality.
en: rayonnement diffusé
tomography
noun
A technique for displaying a representation of a cross section through a human body or other solid object using X-rays or ultrasound.
Example: Combining PET and CT (computed TOMOGRAPHY using X-rays) been an important development.