ARMRIT Practice test| 30 Questions| accurate 100%

ARMRIT Practice test| 30 Questions| accurate 100% 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