MRSO UPDATED CORE MAIN TEST QUESTIONS
AND ANSWERS SURE A+
✔✔Slew Rate - ✔✔The speed at which the gradient coils can change the gradient
magnetic field.
✔✔90 Degree RF - ✔✔The amount of energy used to tilt the hydrogen from longitudinal
magnetism into the transverse axis.
✔✔180 Degree RF - ✔✔The amount of energy used to tilt the hydrogen from
longitudinal magnetism 180 degrees.
Used in a Spin Echo sequence to regain phase coherency.
✔✔Bsub1 - ✔✔The unit used to describe the time-varying RF magnetic field.
✔✔E-fields - ✔✔The electrical field is a result when a conductive material is exposed to
a changing magnetic field.
✔✔Electromagnetic Spectrum - ✔✔The spectrum of frequencies that identify the
amount and form of energy found at a specific frequency.
, ✔✔Faraday's Law of Induction - ✔✔This describes how electrical current are produced
in the presence of alternating magnetic field.
✔✔Far Field - ✔✔The area in our gantry furthest from the RF transmitter.
✔✔Near Field - ✔✔The area in our gantry closest to the RF transmitter.
✔✔First Controlled Mode - ✔✔This is a mode where maximum regulated limit of SAR is
allowed during acquisition.
Limited to 4W/kg for whole body.
✔✔Flip Angle - ✔✔A variable RF pulse that will tilt hydrogen away from the longitudinal
axis less than 90 degrees.
✔✔Hertz - ✔✔The amount of waveform in a second.
✔✔Larmor Equation - ✔✔The equation used to identify the center frequency at a
specific static magnetic field strength.
Precessional frequency = gyromagnetic ration x B0
✔✔Longitudinal Recovery - ✔✔The period of time after an excitation pulse where
magnetism returns to equilibrium magnetism.
✔✔Loop Burns - ✔✔This is a type of burning where electrical current is induced in a
patient and forced through a small contact area causing a burn.
✔✔Non-Ionizing - ✔✔A form of energy that does not cause biological damage to
tissues.
✔✔Normal Mode - ✔✔This is a standard mode of operation where SAR for the whole
body is limited to 2W/kg and 3.2 Wkg for the Head.
✔✔Parallel Imaging - ✔✔This is a technique where 2 or more coils can be used in
tandem to collect multiple lines of K space at a time.
✔✔Radio Waves - ✔✔the range of frequencies that are used in MRI to produce
resonance.
✔✔Receive Only Coil - ✔✔A Coil that only detects signal emitted from the patient.
✔✔Reflective Burns - ✔✔This is a burning where RF is reflected back to the patient
producing burning.
AND ANSWERS SURE A+
✔✔Slew Rate - ✔✔The speed at which the gradient coils can change the gradient
magnetic field.
✔✔90 Degree RF - ✔✔The amount of energy used to tilt the hydrogen from longitudinal
magnetism into the transverse axis.
✔✔180 Degree RF - ✔✔The amount of energy used to tilt the hydrogen from
longitudinal magnetism 180 degrees.
Used in a Spin Echo sequence to regain phase coherency.
✔✔Bsub1 - ✔✔The unit used to describe the time-varying RF magnetic field.
✔✔E-fields - ✔✔The electrical field is a result when a conductive material is exposed to
a changing magnetic field.
✔✔Electromagnetic Spectrum - ✔✔The spectrum of frequencies that identify the
amount and form of energy found at a specific frequency.
, ✔✔Faraday's Law of Induction - ✔✔This describes how electrical current are produced
in the presence of alternating magnetic field.
✔✔Far Field - ✔✔The area in our gantry furthest from the RF transmitter.
✔✔Near Field - ✔✔The area in our gantry closest to the RF transmitter.
✔✔First Controlled Mode - ✔✔This is a mode where maximum regulated limit of SAR is
allowed during acquisition.
Limited to 4W/kg for whole body.
✔✔Flip Angle - ✔✔A variable RF pulse that will tilt hydrogen away from the longitudinal
axis less than 90 degrees.
✔✔Hertz - ✔✔The amount of waveform in a second.
✔✔Larmor Equation - ✔✔The equation used to identify the center frequency at a
specific static magnetic field strength.
Precessional frequency = gyromagnetic ration x B0
✔✔Longitudinal Recovery - ✔✔The period of time after an excitation pulse where
magnetism returns to equilibrium magnetism.
✔✔Loop Burns - ✔✔This is a type of burning where electrical current is induced in a
patient and forced through a small contact area causing a burn.
✔✔Non-Ionizing - ✔✔A form of energy that does not cause biological damage to
tissues.
✔✔Normal Mode - ✔✔This is a standard mode of operation where SAR for the whole
body is limited to 2W/kg and 3.2 Wkg for the Head.
✔✔Parallel Imaging - ✔✔This is a technique where 2 or more coils can be used in
tandem to collect multiple lines of K space at a time.
✔✔Radio Waves - ✔✔the range of frequencies that are used in MRI to produce
resonance.
✔✔Receive Only Coil - ✔✔A Coil that only detects signal emitted from the patient.
✔✔Reflective Burns - ✔✔This is a burning where RF is reflected back to the patient
producing burning.
