Alternative imaging assignment

Question 1

Which of the following imaging modalities produces images without the use of radiation

Answer 1

Ultrasound

Question 2

What element is found within the transducer of an ultrasound machine?

Answer 2

Piezoelectric ceramics

Question 3

What happens to crystals within the ultrasound transducer when strong, short electrical pulses strike them?

Answer 3

They vibrate

Question 4

Approximately how many shades of grey are incorporated into the display of an image obtained through ultrasound?

Answer 4

256

Question 5

What is the correct definition of the abbreviation B-mode in ultrasound

Answer 5

Brightness

Question 6

Which of the following best describes the use for doppler ultrasound?

Answer 6

Doppler is used to image the flow of blood and other liquids as well as to measure their velocity

Question 7

When using color-flow doppler in ultrasound, what do the displayed red and blue colors mean?

Answer 7

The colors show blood flow; blue indicates flow away, red indicates flow toward

Question 8

Which of the following frequencies will allow for the deepest level of penetration in ultrasound

Answer 8

4 MHz

Question 9

Which of the following is the proper way to disinfect an ultrasound probe?

Answer 9

Wipe with glutaraldehyde-based disinfectant

Question 10

Which of the following ultrasound artifacts will likely be produced when the sound wave strikes a metal object or a pocket of air?

Answer 10

Comet tail

Question 11

Which of the following is the correct definition for the ultrasound term hypoechoic?

Answer 11

Dark gray

Question 12

Which of the following can the piezoelectric crystal within an ultrasound probe do?

Answer 12

Change shape in the intercostal region, which transducer would be ideal

Question 13

To perform an ultrasound in the intercostal region, which transducer would be ideal?

Answer 13

Microconvex probe

Question 14

When scanning in the sagittal plane, where is the cranial aspect of the patients body displayed on the ultrasound monitor?

Answer 14

Left side of the monitor

Question 15

What is the speed of sound through air?

Answer 15

330 m/s

Question 16

Which of the following correctly describes a CT image?

Answer 16

3 dimensional image
a matrix of voxels

Question 17

A computed tomography x-ray can rotate how many degrees

Answer 17

360

Question 18

Which of the following best describes the word tomography.

Answer 18

Cut or section

Question 19

Modern CT scanners use multi-slice technology and are able to acquire image slices thinner than which of the following sizes?

Answer 19

1 mm

Question 20

Pitch refers to in CT imaging

Answer 20

A ratio between the table movement in mm and the CT slice thickness

Question 21

Which imaging modality is superior for demonstrating the brain and spinal cord

Answer 21

MRI

Question 22

What is the major safely concern with MRI machines

Answer 22

The potential projectile effect with metallic objects within the vicinity of the machine

Question 23

Which of the following is the most common medical magnet

Answer 23

Superconducting magnets

Question 24

What does MRI require to highlight injections, tumors, or vascular disease?

Answer 24

Gadolinium

Question 25

Which of the following factors should all personnel understand about MRI machines?

Answer 25

Every patient/employee should be screened for safety purposes
No loose metallic objects can be near the machine
It consists of a strong magnetic field