Radiology Terminology

Deciphering Radiology One Term at a Time

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
There are 31 names in this directory beginning with the letter E.
echocardiogram
This test uses a small transducer that produces high-frequency sound waves, which create detailed images of the heart.
edema
An accumulation of an excessive amount of watery fluid in cells, tissues, or serous cavities.
electrocardiogram
Also called EKG or ECG. A test that records the electrical activity of the heart; it is used to help diagnose certain heart abnormalities.
electromagnetic radiation
Radiation consisting of electric and magnetic waves that travel at the speed of light, such as light, radio waves, gamma rays and x-rays.
electronic detector
The part of a digital imaging system that captures and converts x-rays as they pass through a patient into digital signals which are in turn sent to a computer to produce images.
electronic media
Storage media in PCs and removable/transportable digital media such as magnetic tapes or disks, CDs, pen, flash drives, optical disks, or digital memory cards; or transmission media such as the intranet, dial-up lines, and/or private networks.
electronic medical information
Patient information, including radiological images, lab test results, medications, clinical history, etc., stored on electronic media.
embolic agent
A material used to block off blood flow through a vessel.
embolization
The movement of a blood clot, piece of tissue, or pocket of air or gas from where it forms through the bloodstream until it lodges in place, cutting off the flow of blood with its oxygen and tissue nutrients. Catheter embolization is the deliberate introduction of foreign ("embolic") material such as gelatin sponge or metal coils to stop bleeding or cut off blood flowing to a tumor or arteriovenous malformation.
embolus, pl. emboli
A plug, composed of a detached blood clot, mass of bacteria or other tissue, air or other foreign body, completely or partially blocking a vessel.
embryo
In humans, the developing organism from conception until approximately the end of the second month; developmental stages from this time to birth are commonly designated as fetal.
empyema
An abscess or infection in the space between the lung and the chest wall (pleural space).
encephalitis
An acute inflammation of the brain caused by a viral infection.
encephalography
Radiographic representation of the brain.
encephalopathy
An alteration of normal brain function that can lead to confusion.
encryption
The process of transforming or coding information to make it unreadable to anyone except those possessing special knowledge or the key to decrypt the data.
endocrine gland
1. A gland that produces and secretes hormones into the blood or lymph nodes, exerting powerful effects on specific tissues throughout the body. 2. An organ consisting of specialized cells that produces and sends hormones into the bloodstream, affecting various processes throughout the body.
endoluminal
Referring to the inside.
endometrium
The mucous membrane that forms the inner layer of the uterine wall; the thickness of the endometrium undergoes marked changes with the menstrual cycle.
endorectal MRI
A magnetic resonance imaging (MRI) performed from the inside of the rectum.
endoscope
An illuminated optical instrument used to examine inside the body.
endoscopy
The use of an illuminated optical instrument to visualize the interior of the body and its organs.
endovaginal
Within the vagina (the genital canal in the female, extending from the uterus to the vulva).
endovaginal ultrasonography
Pelvic ultrasonography using a probe inserted into the vagina.
endovenous
Within the vein.
enzyme
A protein that regulates chemical changes in other substances.
epidural analgesia
Injection of a local anesthetic into the epidural space of the spine to prevent or eliminate pelvic pain.
esophagitis
Inflammation of the esophagus, the tube-like structure connecting the throat with the stomach.
esophagoscope
A long, narrow tube with a light and lens that is used for examining the throat and esophagus.
esophagus
The "food tube" which connects the mouth to the stomach.
excisional biopsy
A type of surgical biopsy in which an entire lesion or abnormal group of cells and tissue as well as a surrounding margin of normal-appearing tissue are removed.