ARMRIT Practice test questions and answers

ARMRIT Practice test questions and answers Magnetism can be defined as the ability of certain substances to attract: - Ans ️️ -Iron, Cobalt, Nickel The components of the Gyro-magnetic ratio are: - Ans ️️ -Magnetic moment to angular momentum Which type of electromagnetic coils produce smaller magnetic field which allow spatial localization to be performed? - Ans ️️ -Gradient coils Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? - Ans ️️ -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: - Ans ️️ -37% Which cryogenic material can produce temperature as low as 4 degrees Kelvin? - Ans ️️ - Liquid Helium The T1 process is also known as - Ans ️️ -Spin-Lattice a 90 degree radio-frequency pulse will alter the net magnetization vector. Another effect is: - Ans ️️ -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.? - Ans ️️ -Permanent To describe the uniformity of the MRI system's main magnetic field, the term employed is - Ans ️️ -Homogeneity The purpose of magnetic resonance angiography is to image the - Ans ️️ -Blood Flow