SNR vs Spatial Res
PSD's
Contrast
Safety
Anatomy/Artifacts
100
This increase SNR by 40%
What is doubling NEX/NSA?
100
This is earliest used and most simple pulse sequence.
What is Spin Echo?
100
It controls the amount of T1 contrast in an image.
What is TR (Repetition Time)?
100
It's the maximum allowed SAR to the patient using the body coil transmit operating in NORMAL mode.
What 2.0 W/kg?
100
It's the plane of acquisition of this image.
What is Axial?
200
Increasing this decreases SNR but increases T2W.
What is TE (Echo Time)?
200
It starts with a 1800 RF pulse.
What is Inversion Recovery?
200
Increasing this increases T2 contrast yet lowers SNR.
What is TE (Echo Time)?
200
It's the minimum dB that can cause hearing damage.
What is 85dB?
200
It's the anatomy circled.
What is the pituitary gland?
300
This increases SNR by increasing the number of protons in the longitudinal magnetization vector (Mz)).
Increasing magnetic field strength (B0).
300
Meaning the same as "suppression" it's the "A" in FLAIR.
What is "attenuate"?
300
For T1W, it's always very short.
What is TE?
300
At one point it was contraindicated in MRI but today is scanning safety and offend.
What is a pacemaker?
300
It's the structure being pointed to.
What is the odontoid process or dens?
400
Increasing this always increases spatial resolution... assuming no other parameters are changed of course.
What is Matrix (phase and frequency steps)
400
The time between one echo and the next echo in a Echo Train.
What is Echo Spacing (ESP)?
400
This describes the number of water-bound protons per volume of tissue.
What is Proton Density
400
The person ADVISES the MRMD and excuses his/her orders.
What is the MR Safety Officer (MRSO)?
400
It's the weighting of this image
What is T1W?
500
This samples more signal but samples more noise as well.
Increasing NEX/NSA
500
This pulse sequence uses a series of gradient reversals to create echos that fill k-space in what Tom calls "Wicked fast!"
What is Echo Planar Imaging (EPI)?
500
They happen simultaneously, at greatly different rates, and are completely independent of one another.
What is T1 recovery and T2 decay?
500
The chemical bond combine the Gd+ and the ligand molecule.
What is a chelate?
500
It's the structure circled.
What is the pulmonary artery?