MRSO Safety Test with Questions Solved 100% Correct
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Course
MRSO
Institution
MRSO
90 degree RF - Answer The amount of energy used to tilt hydrogen from longitudinal
magnetism into the transverse axis
180 degree RF - Answer The amount of energy used to move hydrogen 180 degrees.
This is used in a spin echo sequence to regain phase coherency.
Bsub1 - Answer The unit used to de...
MRSO Safety Test with Questions Solved
100% Correct
90 degree RF - Answer The amount of energy used to tilt hydrogen from longitudinal
magnetism into the transverse axis
180 degree RF - Answer The amount of energy used to move hydrogen 180 degrees.
This is used in a spin echo sequence to regain phase coherency.
Bsub1 - Answer The unit used to describe the time-varying RF magnetic field
E Fields - Answer The electrical field is a result when a conductive material is exposed to
a changing magnetic field
First controlled mode - Answer This is a mode where the maximum regulated limit of
SAR is allowed during acquisition. This is limited to 4w/kg for the whole body.
Flip angle - Answer A variable RF pulse that will tilt hydrogen away from the longitudinal
axis less than 90 degrees
Frequency - Answer The rate that something is repeated over a period of time
Hertz - Answer The amount of waveforms in a second
Larmor equation - Answer The equation used to identify the center frequency at a
specific static magnetic field strength.
, Longitudinal recovery - Answer The period of time after an excitation pulse where
magnetism returns to equilibrium magnetism
Non-ionizing - Answer A form of energy that does not cause biological damage to tissues
Normal mode - Answer This is a standard mode of operation where SAR for the whole
body is kept to 2 w/kg
Parallel imaging - Answer This is a technique where 2 or more coils can be used in
tandem to collect multiple lines of K space at the same time
Receive only coil - Answer A receiver coil that only detects signal emitted from the
patient
Radio Waves - Answer The range of frequencies that are used in MRI to produce
resonance
Reflective burns - Answer This is a burning where RF is reflected back to the patient
producing burning
Resonance - Answer The transverse of energy from one thing to another by means of
two or more things oscillating at the same frequency.
Resonant Burns - Answer This is a type of burn where resonance is produced in an
implant or in equipment on patient, which will produce induction. The e-fields produced
will cause burning.
Proximity Burns - Answer This is a type of burning where tissues in the near field get
burned.
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