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MRSO FINAL EXAM ()
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Exam of 50 pages for the course MRSO at MRSO (MRSO FINAL EXAM ())
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MRSO FINAL EXAM WITH QUESTIONS AND ANSWERSElectrical fields can only be produced in objects that are what?
A. Plastic
B. Exposed to RF fields
C. Small
D. Ferromagnetic <<<answers>>>>B. Exposed to RF fields
Which of the following is used to estimate body heating?
A. SAR
B. Decibels
C. Hertz
D. Watts <<<answers>>>>A. SAR
A form of energy that does not cause biological damage to
tissues. <<<answers>>>>Non-Ionization
This is a standard mode of operation where SAR for the whole
body is kept to 2 W/kg <<<answers>>>>Normal Mode
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.
<<<answers>>>>Parallel Imaging
, MRSO FINAL EXAM WITH QUESTIONS AND ANSWERS
The range of frequencies that are used in MRI to produce
resonance. <<<answers>>>>Radio waves
A receiver coil that only detects signal emitted from the patient.
<<<answers>>>>Receive Only Coil
This is a burning where RF is reflected back to the patient
producing burning. <<<answers>>>>Reflective Burns
This is a type of burn where resonance is produced in an implant
or in equipment on a patient, which will produce induction. The
e-efields produced will cause burning.
<<<answers>>>>Resonant Burns
This is a type of burning where tissues in the near field get
burned. <<<answers>>>>Proximity Burn
This is a mode reserved for research or for testing where the
SAR can operate above the maximum regulated limit.
<<<answers>>>>Second Controlled Mode
This is used to measure the amount of patient heating produced
in a patient during acquisition. It is measured in Watts/kg.
<<<answers>>>>Specific Absorption Rate
, MRSO FINAL EXAM WITH QUESTIONS AND ANSWERS
The body releases sweat through pores, so evaporation can
occur. This evaporative cooling can help lower body
temperature. <<<answers>>>>Thermoregulatory Mechanisms:
Evaporation
Energy can be transferred from one source to another. By
placing a cold source on our patient, flowing blood can be
cooled lowering a patient's body temperaure.
<<<answers>>>>Thermoregulatory Mechanisms: Conduction
Heat radiates from a heat source to a cooler area. By passing a
cool air over a patient, heat can move away from the patient
lowering their body temperature.
<<<answers>>>>Thermoregulatory Mechanisms: Convection
Heat will flow away from a patient body.
<<<answers>>>>Thermoregulatory Mechanisms: Radiation
A receiver coil that produces RF energy and detects signal from
the patient. <<<answers>>>>Transmit-Receive Coil
The period of time after an excitation pulse where magnetism is
lost in the transverse axis. <<<answers>>>>Transverse Decay
, MRSO FINAL EXAM WITH QUESTIONS AND ANSWERS
The distance from one amplitude in a frequency to the next.
<<<answers>>>>Wavelength
Using a fan to cool a patient is an example of which of the
following?
A. Conduction
B. Evaporation
C. Radiation
D. Convection <<<answers>>>>D. Convection
A patient comes down from the unit as an in-patient. The patient
went to radiography to have a chest x-ray before coming to
MRI. She needs to have a cervical MRI for severe pain. It is
suspected that she may have a herniated disc. She checked to
pacemaker, dentures and tattoos. You are scanning the patient's
cervical spine in a 3.0T unit, with a receive only coil. What do
you do next?
A. Cancel the exam
B. Review the x-ray with the radiologist
C. Order an abdomen x-ray
D. Scan the patient on a 1.5T unit. <<<answers>>>>B. Review
the x-ray with the radiologist.
The ACR guidance policy of 2013 does what?
A. Defines MR personnel.
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