MRI Safety
People who passed minimum safety education as they work in zone 3.
What is Level 1 personnel?
The symbol is given to the main magnetic field or longitudinal magnetization.
What is Bo?
On a T2 image, CSF appears ____.
What is bright or hyperintense?
The pulse sequence that uses 180- 90- 180 RF pulses.
What is Inversion Recovery?
The anterior most lobe of the brain,
What is the frontal lobe?
The two MR zones that are restricted access.
What are zones 3 and 4?
Nuclei spin on their own axis. When placed in a strong magnetic field, a secondary spin occur and it is called _____.
What is Precession?
The amount of T2 weighting is control by _____ parameter.
What is echo time (TE)?
The pulse sequence that is used to null the signal from fluid.
What is FLAIR?
the name of the view along the X-axis.
What is sagittal view?
The term used to describe visual disturbances that occur when the retina is stimulated by the gradient magnetic field.
What is magneto-phosphenes?
The gyromagnetic ratio of hydrogen.
What is 42.57MHz/T?
The time from the one excitation RF pulse to the next excitation RF pulse is called _______.
What is Repetition time (TR)?
In a Gradient Echo Pulse sequence, _____ is used to excite the magnetic moments.
What is a variable flip angle?
the largest part of the brain that is divided into left and right hemisphere.
What is the cerebrum?
This terminology is defined as the amount of power deposited by the RF in a certain amount of tissue
What is SAR?
Magnetic moments that are on the same precessional path are said to be ______.
What is In-phase?
T2 is the time required for the transverse magnetization to fall to approximately _____ of its maximum initial value.
What is 37%?
These parameters are used to create spin echo T1-weighted images.
What is short TR and short TE?
This is located closer to the temporal lobes and must be included when performing a seizure brain.
What is the hippocampus?
If a patient complains of tingling on their skin it is most likely due to this.
What is peripheral nerve stimulation (PNS)?
Another name for T2 decay
What is spin-spin relaxation?
T1 is the time required for the longitudinal magnetization to grow from zero to ____ amount of its maximum value.
What is 63%?
This term describes the signal that follows the application of the initial 90 degree RF pulse.
What is FID?
condition where the lower part of the brain pushes into the spinal cord.
What is Arnold-Chiari malformation?