Ch 14 Diagnostic Imaging Terms/ Procedures

Question 1

anteroposterior view

Answer 1

positioning the patient so that the x-rays pass through the body from the anterior side to the posterior side

Question 2

barium (Ba)

Answer 2

soft metallic element from the earth used as a radiopaque X-ray dye

Question 3

film

Answer 3

Thin sheet of cellulose material coated with a light-sensitive substance that is used in taking photographs. There is a special photographic film that is sensitive to X-rays

Question 4

film badge

Answer 4

Badge containing film that is sensitive to X-rays. This is worn by all personnel in radiology to measure the amount of X-rays to which they are exposed

Question 5

lateral view

Answer 5

positioning of the patient so that the side of the body faces the X-ray machine

Question 6

oblique view

Answer 6

positioning of the patient so that the X-rays pass through the body on an angle

Question 7

posteroanterior view

Answer 7

positioning of the patient so that the X-rays pass through the body from the posterior side to the anterior side

Question 8

radiography

Answer 8

making of X-ray pictures

Question 9

radioisotope

Answer 9

radioactive form of an element

Question 10

radiologist

Answer 10

physician who uses images to diagnose abnormalities and radiant energy to treat various conditions such as cancer

Question 11

radiolucent

Answer 11

structures that allow X-rays to pass through; expose the photographic plate and appear as black areas on the X-rays

Question 12

radiopaque

Answer 12

structures that are impenetrable to X-rays, appearing as a light area on the X-ray

Question 13

roentgen

Answer 13

unit for describing an exposure dose of radiation

Question 14

scan

Answer 14

recording on a photographic plate the emission of radioactive waves after a substance has been injected into the body

Question 15

shield

Answer 15

device use to protect against radiation

Question 16

tagging

Answer 16

attaching a radioactive material to a chemical, and tracing it as it moves through the body

Question 17

uptake

Answer 17

absorption of radioactive material and medicines into an organ or tissue

Question 18

X-ray

Answer 18

high-energy wave that can penetrate most solid matter and present the image on photographic film

Question 19

computed tomography scan (CT scan)

Answer 19

imaging technique that is able to produce a cross-sectional view of the body. X-ray pictures are taken at multiple angles through the body. A computer then uses all these images to construct a composite cross section.

Question 20

contrast studies

Answer 20

radiopaque substance is injected or swallowed. X-rays are then taken that will outline the body structure containing the radiopaque substance. ex. angiograms and myelograms

Question 21

Doppler ultrasonography

Answer 21

use of ultrasound to record the velocity of blood flowing through blood vessels. used to detect blood clots and blood vessel obstructions

Question 22

fluoroscopy

Answer 22

X-rays strike a fluorescing screen rather than a photographic plate, causing it to glow. The glowing screen changes from minute to minute; therefore the movement, such as the heart beating or the digestive tract moving, can be seen.

Question 23

magnetic resonance imaging (MRI)

Answer 23

use of electromagnetic energy to produce an image of soft tissues in any plane of the body. Atoms behave differently when placed in a strong magnetic field. When the body is exposed to this magnetic field the nuclei of the body’s atoms emit radio-frequency signals that can be used to create an image.

Question 24

nuclear medicine

Answer 24

use of radioactive substances to diagnose diseases. A radioactive substance known to accumulate in certain body tissues is injected or inhaled. After waiting for the substance to travel to the body area of interest, the radioactivity level is recorded. aka a scan

Question 25

positron emission tomography (PET)

Answer 25

Image is produced following the injection of radioactive glucose. The glucose will accumulate in areas of high metabolic activity. Therefore, this process will highlight areas that are consuming a large quantity of glucose. This may show an active area of the brain or a tumor.

Question 26

radiology

Answer 26

use of high-energy radiation, X-rays, to expose a photographic plate. The image is a black- and -white picture with radiopaque structures such as bone appearing white and radiolucent tissue such as muscles appearing dark

Question 27

ultrasound

Answer 27

use of high-frequency sound waves to produce an image. Sound waves directed into the body from a transducer will bounce off internal structures and echo back to the transducer. The speed of the echo is dependent on the density of the tissue. A computer is able to correlate speed of echo with density and produce an image. used to visualize internal organs, heart valves, and fetuses.