Basic Principles Flashcards
How often should the cryogen level be checked?
daily
What is the best imaging modality for soft tissue?
Magnetic Resonance Imaging
Which imaging modality uses ionizing radiation, cross-sectional, from multiple points of view?
CT
Why would MRI be used instead of X-ray or CT?
MRI generates a large variety of contrast
Who develops the law of magnet induction?
Faraday
Which imaging modality uses ionizing radiation?
x-ray
Who develops the first magnet?
Damadian
What creates all the noise?
gradients (Lauterbur)
What is the main magnet’s issue?
projectiles
What is the most commonly used imaging modality?
x-ray
What is PET?
a medical imaging procedure that uses a radioactive isotope attached to glucose
What is RF’s main issue?
burns
What does a moving/changing magnetic create?
current conductor
Which imaging modality uses transducer on patient’s?
ultrasound
When do MRI tech press the “quench” button?
only when it’s life or death
What do MRI tech do when there’s natural disaster?
turn off the power, not “quench”
Who regulates medical meds and machines?
FDA
What do MRI tech do when there’s flood/electrical fire?
press emergency button
What happens when the patient is having cardiac arrest on the MRI table?
get them out first
Why would CT be used instead of MRI?
it’s fast, best for blood vessels
Does the RF have ionizing radiation?
no. it has non-ionizing radiation
What is the fringe field in the context of MRI?
the stray magnetic field outside the bore of the magnet.
What can the fringe field do?
pull ferromagnetic objects
How many protons does hydrogen have?
1 proton
How many neutrons does hydrogen have?
0
How many electrons does hydrogen have?
1
What is the basic hydrogen atom - a single proton circled by a single electron?
protium
What is it called when an atom has same number of protons but different number or neutrons?
isotope
