Magnetic Marvels & Radio Riddles
This is the "R" in "MRI"
What is resonance?
This coil is located closest to the person being scanned, and is also called the head coil
What is the RF (or transmit-receive) coil?
The time required for the longitudinal magnetization to recover to 63% of its maximum value
What is T1?
This is the main danger associated with MRI scans
What is metal?
The main field coil generates this primary, longitudinal magnetic field through the bore of the scanner
What is B0?
The time required for the transverse magnetization to decay to 37% of its initial value
What is T2?
This pulse causes the longitudinal magnetization to flip into the X-Y plane, creating a transverse magnetization
What is a 90-degree RF pulse?
These coils are used to vary the magnetic field along a linear axis for slice selection and phase/frequency encoding
What are gradient coils?
The image-weighted created when you use a short TE and a short TR
What is T1-weighting?
This equation states that the precession frequency becomes higher when the magnetic field strength increases
What is the larmor equation?
MR coils transmit and receive energy/waves in what frequency of the electromagnetic spectrum?
What are radio waves?
Increasing the echo-time results in more of this contrast
What is T2 weighting?
The time between the first RF pulse and when we measure the signal/echo
What is the echo-time (TE)?
These coils are responsible for the loud noises during an MRI scan
What are gradient coils?
This substance has a short T1 and a short T2
What is fat?