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 23 names in this directory beginning with the letter N.
narcotic
A substance that is used medically to relive pain and/or produce a state of drowsiness or sleep.
nasal cavity
A system of air channels connecting the nose with the back of the throat.
natural background exposure
Radiation is a natural part of life. It has existed since the beginning of time and is an integral part of the universe in which we live. Life as we know it on earth has evolved in the presence of radiation. Radiation comes to us from many sources both natural and man-made. These sources include cosmic radiation from outer space, radiation from the soil and buildings, and natural isotopes in our own bodies. Cosmic radiation and terrestrial radiation vary with location.
necrosis
The death of living tissue.
needle aspiration
The removal of living tissue for microscopic examination by suction through a fine needle attached to a syringe. The procedure is used primarily to obtain cells from a lesion containing fluid.
needle biopsy
Removal of tissue or suspensions of cells from living patients through a small needle for diagnostic examination.
neoadjuvant treatment
A treatment given prior to the main or primary treatment.
neonatal intensive care unit (NICU)
An intensive care unit containing specialized equipment to treat and care for premature or critically ill newborn babies.
nephrogenic
Of or related to the kidney.
nephropathy
Damage to or disease of the kidney.
nerve fibers
Also called axons. Threadlike extensions from a nerve cell.
neuro-oncologist
A doctor who specializes in diagnosing and treating brain tumors and other tumors of the nervous system.
neuroendovascular treatments
Procedures in which miniature instruments or a catheter containing medications are inserted into a blood vessel in the brain to treat vascular disease or abnormalities.
neurologic
Pertaining to the nervous system and its disorders.
neurologist
A physician who specializes in the diagnosis and treatment of diseases and conditions related to the brain and nervous system.
neuron
Also called a nerve cell. A specialized cell in the brain and nervous system that receives and sends electrical impulses through networks of connections.
neuroradiology
The clinical subspecialty concerned with the diagnostic radiology of diseases of the central nervous system, head, and neck.
neurostimulators
Devices that are implanted into the spine and connected to internal or external generators to stimulate the nerves as a means of disrupting pain signals or causing organs to function more efficiently.
nodule
A small, solid lump. A lump can be benign or malignant.
non-Hodgkin lymphoma
One of two major categories of lymphoma, a cancer of the blood, that begins in either the B cells or T cells of the immune system.
nonradiologic
Not related to radiology.
nonrepudiation
Nonrepudiation ensures that a party cannot argue the validity of a statement or contract, that a transferred message has been sent and received by the parties claiming to have sent and received the message; methods include digital signature, the use of public and private keys, and auditing of all user activity.
NSAID
A non-steroidal anti-inflammatory drug that reduces swelling and pain, such as aspirin and ibuprofen.