Magnetism can be defined as the ability of certain substances to attract: - ANSWER Iron,
Cobalt, Nickel
The components of the Gyro-magnetic ratio are: - ANSWER Magnetic moment to angular
momentum
Which type of electromagnetic coils produce smaller magnetic field which allow spatial
localization to be performed? - ANSWER Gradient coils
Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? -
ANSWER Superconductive
T2 is the measurement of time for the transverse component of the net magnetization
vector to decrease what percentage of its maximum value after the application of a 90
degree radio frequency pulse: - ANSWER 37%
Which cryogenic material can produce temperature as low as 4 degrees Kelvin? -
ANSWER Liquid Helium
The T1 process is also known as - ANSWER Spin-Lattice
a 90 degree radio-frequency pulse will alter the net magnetization vector. Another effect is: -
ANSWER The hydrogen protons will have phase coherence.
Which type of MRI magnet requires no electricity to maintain its magnetic field and can
weigh from 18,000 lb. to 200,000 lb.? - ANSWER Permanent
1
Cobalt, Nickel
The components of the Gyro-magnetic ratio are: - ANSWER Magnetic moment to angular
momentum
Which type of electromagnetic coils produce smaller magnetic field which allow spatial
localization to be performed? - ANSWER Gradient coils
Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? -
ANSWER Superconductive
T2 is the measurement of time for the transverse component of the net magnetization
vector to decrease what percentage of its maximum value after the application of a 90
degree radio frequency pulse: - ANSWER 37%
Which cryogenic material can produce temperature as low as 4 degrees Kelvin? -
ANSWER Liquid Helium
The T1 process is also known as - ANSWER Spin-Lattice
a 90 degree radio-frequency pulse will alter the net magnetization vector. Another effect is: -
ANSWER The hydrogen protons will have phase coherence.
Which type of MRI magnet requires no electricity to maintain its magnetic field and can
weigh from 18,000 lb. to 200,000 lb.? - ANSWER Permanent
1
