The uptake of energy from radiation by the tissue or medium through which it passes.Ī naturally occurring metal a contrast material.Ī unidirectional emission of electromagnetic radiation or particles.Ī method of examining blood vessels utilizing X-rays and injection of iodine-rich contrast material.Ī measure of ionization in air caused by X-rays or gamma rays only. Structures demonstrated by an echo-free region surrounded by a well-defined margin or border ![]() Uses sonographer’s findings to interpret images and reach diagnosisĪn echogenic structure with varying internal echoes that represent biliary ducts and branches of the hepatic and portal veinsĪ needle is used to withdraw amniotic fluid within the uterus for genetic analysis Produces images of diagnostic quality for interpretation and diagnosis by the radiologist “blips” seen on a monitor the height of these blips represents the intensity of the returning echoĮliminates air trapped between the fact of the transducer and the skin surfaceĪ barrier to the high-frequency sound waves of ultrasound The distance between the corresponding points on an ultrasound wave Ultrasound images that demonstrate motion or change within a structure in real timeĪcoustic energy that is reflected from a structure back towards the transducerĪcoustic energy that travels through a medium Highly reflective structures as compared with surrounding structuresĪn anatomic structure or region of the body that produces fewer echoes than normal The number of ultrasound waves per second _ doppler detects changes in velocity and direction of blood seen as different shades of colourĪn anatomic structure or region of the body that highly reflects sound energy Sound waves that are reflected by internal structures back to the transducerĪn anatomic structure or region of the body that does not produce any echoesĪn echo that does not represent a real object and/or anatomic structureĪspect of acoustic energy that is reflected back toward the sourceĮchoes converted into bright dots that vary in intensity according to strength of the echo Serves as a sender and receiver of the ultrasound signalĪ _ scan produces an image that resembles an axial CT scan. In 1877, Pierre Curie and brother Jacques Curie, both of whom are French physicists, demonstrate the first _ effect.This effect is how ultrasound transducers emit and recieve sound waves.Īn imaging technique that uses high-frequency sound waves to produce images of organs and structures in the bodyĭetects frequency and velocity shits of a moving structure In 1977, the first human MRI was done lasting how many hours? Brownell suggested using the radiation emitted by positron annihilation to improve the quality of brain images by increasing sensitivity and resolution. This modality is recognized in 1976 as a screening tool by the American Cancer Society.ġ982 brought on this system to organize imaging studies. In 1949, a radiologist introduced a _ technique to flatten the breast for Mammography. ![]() In 1971, CT scanners were intially installed to scan this body part.ġ936: A radioactive _ is used to treat human disease for the first time, marking the birth of nuclear medicine (Ultrasound uses this tool to scan patients.) ![]() In 1915, Paul Langevin, a physicist, invented the hydrophone to detect objects at the bottom of the sea. ![]() In 1922 this Registry was founded, which we are all a part of today. Beatrice Merrigan was the first ever certified _ _ through the ARRT. In 1882, this man discovered the rotating magnetic field in Hungary. In 1979, Allan Cormack and Godfrey Houndfield were awarded a Nobel Prize in Medicine for the invention of this. In 1914, this woman invented vehicles to carry x-ray equipment into the battlefield.
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