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RAD 245 Exam 2 Review

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

Which element does MRI use the magnetic properties of?

a)

Oxygen

b)

Carbon

c)

Hydrogen

d)

Pottasium

2.

In MRI, which electromagnetic wave is used to cause resonation in hydrogen atoms?

a)

Ultra-Violet waves

b)

Radiowaves

c)

Microwaves

d)

Gamma rays

3.

Different tissues can be identified in MRI because they return to longitudinal alignment and emit radio waves at:

a)

different rates

b)

different angles

c)

identical wavelengths

d)

similar patterns

4.

What CT generation is commonly used today?

a)

3rd Generation CT

b)

2nd Generation CT

c)

Electron Beam CT

d)

1st Generation CT

5.

Images in 3rd generation CT scan scanners are obtained using the rotate-translate (stop and go) action.

a)

TRUE

b)

FALSE

6.

Which technology was essential for the development of third and fourth generation scanners?

a)

Slip-rings

b)

Detector arrays

c)

RF coils

d)

Dose modulators

7.

A pulse sequence using a long TR and long TE will result in:

a)

T2 weighting

b)

T1 weighting

c)

PD weighting

d)

DP weighting

8.

According to the Hounsfield Unit scale, air will have a CT number of:

a)

0

b)

-1000

c)

+1000

d)

-250

9.

Which scanner generation utilized a fixed array of detectors?

a)

4th gen

b)

3rd gen

c)

2nd gen

d)

1st gen

10.

Which of the following utilize a form of electromagnet?

a)

Permanent magnet systems

b)

Resistive magnet systems

c)

Superconductive magnet systems

d)

Open magnet systems

11.

Static magnetic field strengths in MRI are measured in:

a)

Tesla

b)

Watts

c)

Ohms

d)

Grouss

12.

CT is sometimes preferred over radiography due to its:

a)

contrast resolution

b)

freedom from superimposition

c)

low patient dose

d)

low cost to the patient

13.

Arthrography is routinely performed prior to __ or __ imaging.

a)

CT, MRI

b)

CT, US

c)

MRI, US

d)

CT, IR

14.

Which of the following is NOT a joint routinely imaged using arthrography?

a)

Sacroiliac joint

b)

Hip joint

c)

Knee joint

d)

Shoulder joint

15.

Arthrography can be performed using double-contrast methods with:

a)

iodinated contrast and air

b)

iodinated contrast and oil

c)

gadolinium contrast and saline

d)

gadolinium contrast and silver sulfide

16.

What tissue weighting is this image?

a)

T1

b)

T2

c)

PD

d)

Gradient echo

17.

What is the line at which the magnetic field is considered to be strong enough to interfere with electronic devices and cause torque on ferrous objects?

a)

5 gauss line

b)

50 gauss line

c)

5 tesla line

d)

50 tesla line

18.

Which modality is ideal for diagnosing disease in the central nervous system?

a)

MRI

b)

Arthrography

c)

CT

d)

US

19.

Which of the following are forms of 3D post-processing utilized in CT?

a)

shaded surface display

b)

volume rendering

c)

velocity encoding

d)

maximum intensity projection

20.

Computed tomography scanners utilized for cardiac imaging must have excellent:

a)

temporal resolution, allowing them to obtain images rapidly and prevent motion artifacts

b)

spatial resolution, allowing them to obtain images rapidly and prevent motion artifacts

c)

temporal resolution, allowing them to obtain images slowly and prevent distortion

d)

spatial resolution, allowing them to obtain images continuously and prevent distortion