ARMRIT Practice Test Questions With Verified Answers

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.