WorksheetsRAD 245 Exam 2 Review
Total questions: 20
Worksheet time: 20mins
Which element does MRI use the magnetic properties of?
Oxygen
Carbon
Hydrogen
Pottasium
In MRI, which electromagnetic wave is used to cause resonation in hydrogen atoms?
Ultra-Violet waves
Radiowaves
Microwaves
Gamma rays
Different tissues can be identified in MRI because they return to longitudinal alignment and emit radio waves at:
different rates
different angles
identical wavelengths
similar patterns
What CT generation is commonly used today?
3rd Generation CT
2nd Generation CT
Electron Beam CT
1st Generation CT
Images in 3rd generation CT scan scanners are obtained using the rotate-translate (stop and go) action.
TRUE
FALSE
Which technology was essential for the development of third and fourth generation scanners?
Slip-rings
Detector arrays
RF coils
Dose modulators
A pulse sequence using a long TR and long TE will result in:
T2 weighting
T1 weighting
PD weighting
DP weighting
According to the Hounsfield Unit scale, air will have a CT number of:
0
-1000
+1000
-250
Which scanner generation utilized a fixed array of detectors?
4th gen
3rd gen
2nd gen
1st gen
Which of the following utilize a form of electromagnet?
Permanent magnet systems
Resistive magnet systems
Superconductive magnet systems
Open magnet systems
Static magnetic field strengths in MRI are measured in:
Tesla
Watts
Ohms
Grouss
CT is sometimes preferred over radiography due to its:
contrast resolution
freedom from superimposition
low patient dose
low cost to the patient
Arthrography is routinely performed prior to __ or __ imaging.
CT, MRI
CT, US
MRI, US
CT, IR
Which of the following is NOT a joint routinely imaged using arthrography?
Sacroiliac joint
Hip joint
Knee joint
Shoulder joint
Arthrography can be performed using double-contrast methods with:
iodinated contrast and air
iodinated contrast and oil
gadolinium contrast and saline
gadolinium contrast and silver sulfide
What tissue weighting is this image?
T1
T2
PD
Gradient echo
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?
5 gauss line
50 gauss line
5 tesla line
50 tesla line
Which modality is ideal for diagnosing disease in the central nervous system?
MRI
Arthrography
CT
US
Which of the following are forms of 3D post-processing utilized in CT?
shaded surface display
volume rendering
velocity encoding
maximum intensity projection
Computed tomography scanners utilized for cardiac imaging must have excellent:
temporal resolution, allowing them to obtain images rapidly and prevent motion artifacts
spatial resolution, allowing them to obtain images rapidly and prevent motion artifacts
temporal resolution, allowing them to obtain images slowly and prevent distortion
spatial resolution, allowing them to obtain images continuously and prevent distortion
