Parameters
Typically, an MRI image's resolution is controlled by this.
What is Matrix?
This artifact occurs when you increase slice thickness "too much".
What is Partial Volume Averaging?
Reducing our FOV, causes our Signal-to-Noise to do this.
What is decreasing SNR?
What is the top of the head?
When setting up for most iMRI intraOp procedures, we do this to warm up the MRI scanner table hours before the patient is transferred on to our MRI table.
What is use a "bear hugger" to warm the surface of the table?
This parameter is largely responsible for the T2-weighting of an MRI Image
What is TE (Time to Echo)?
This type of sequence, most common in Neuro and MSK imaging, is a common solution for motion artifacts.
What is PROPELLER imaging?
When selecting a coil for any exam where multiple coils are an option, it is best to select these coils.
What is smaller coils with higher channels?
When scanning an abdomen / pelvis tumor protocol, this can be a "backup sequence" to the Cor Vol T2 RTr.
What is a BH SSFSE T2, ST=4, SS=-2?
Who are everyone?
This parameter is a combination of acquisitions.
What is NEX (Number of Excitations)?
When scanning a Pancreas (Freq, Dir,: R>L), in order to reduce the pulsatile motion from the abdominal aorta, we would place a saturation band in this location relative to the prescribed slices.
What is superior to the prescribed slices?
When an awake patient with a sporadic breathing waveform cannot properly perform the required breathing instructions and RTr is not producing high quality images this is your best bet.
What is Navigation? or What is Manual Trigger (SSFSE)?
what is DTI, 3D T1 and T2 CUBE?
When scanning a fetus, the mother should take a valium at this time before the first image is acquired.
What is 15 minutes before acquiring the first MR image?
When scanning an axial plane of the thoracic spine, we need the frequency in this direction to reduce aliasing.
What is the R/L direction?
This artifact arises from stimulated echoes picked up outside the FOV by distant array coils that have not been properly deactivated.
What is annefact (cusp) artifact?
Using parallel imaging or increasing the acceleration of parallel imaging will do this to your SNR.
What is decrease SNR?
If you have a question regarding a protocol, QA or anything else that is related to the scanner, imaging or protocols, reach out to these individuals first.
Who are the Clinical Instructors?
We should be referring to this website during every single MRI exam to ensure that all directions are followed and all sequences are accounted for.
What is MedWiki?
When the parameters of a specific sequence seem incorrect, corrupt or their is an error of any kind, you should do this first.
What is bring over another comparable sequence from another protocol or pull from GE.
Susceptibility artifact is directly proportional to these two MRI parameters.
What is B0 and TE?
DAILY DOUBLE: This is the equation for scan delay.
what is (scan time / 2)+[(contrast/2)x flow rate]?
If Medwiki and a Protocol has a conflict, this should be followed.
What is MedWiki?
During a Code (not at 732), what extension do we call and what information do we provide to the operator?
What is extension 211? and, what is the room number and whether the patient is pediatric or adult (18yo+)?