48 Introduction to Medical Terminology
Copyright Goodheart-Willcox Co., Inc.
48 Introduction to Medical Terminology
Copyright Goodheart-Willcox Co., Inc.
Test/Procedure Defi nition
bone marrow aspiration Process involving the use of a syringe
and needle to withdraw bone marrow
liquid; used in medical procedures such
as stem-cell transplant.
bone scan A nuclear scanning test that identifi es
bone fractures, tumors, or infections.
computerized tomography
(tuh-MAH-gruh-fee) or
computed tomography
(CT)
Process in which radiographic images of
a specifi c section of the body are taken
from multiple angles and then analyzed
by a computer to identify bone injury
or disease. CT scans provide more
detailed imagery than standard X-rays
(Figure 2.31).
lumbar puncture Spinal tap; needle aspiration of
spinal canal fl uid in the lumbar area
(Figure 2.32).
magnetic resonance
imaging (MRI)
A noninvasive scanning test that involves
use of an electromagnetic fi eld and radio
waves to visualize soft-tissue structures.
rheumatoid factor (RF) A blood test performed to diagnose
rheumatoid arthritis.
X-ray Radiographic image used to diagnose
skeletal changes in the body.
Figure 2.31 Anatomy of a CT scan.
Rotating X-ray source
Fan-shaped X-ray beam
Rotating X-ray detectors
CT scan machine
Patient lies on
motorized platform
Motorized platform
Direction of rotation
Computerized tomography
scans are made by rotating an
X-ray beam around the patient.
The CT scanner images the
body in a series of “slices” that
a computer then stitches
together to create 3-D views.
Cerebrospinal fluid
Spinal needle is inserted
between 3rd and 4th
lumbar vertebrae.
Figure 2.32 Lumbar puncture.