RAD 245 Exam 2 Review

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