ARMRIT Practice Test for MRI Technologists with Complete Solutions 2024 Magnetism can be defined as the ability of certain substances to attract: - Correct Answer Iron, Cobalt, Nickel The components of the Gyro-magnetic ratio are: - Correct Answer Magnetic moment to angular momentum Which type of electromagnetic coils produce smaller magnetic field which allow spatial localization to be performed? - Correct Answer Gradient coils Which type of MRI magnet requires cryogen to cool magnetic coils to 4 degrees Kelvin? - Correct 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: - Correct Answer 37%
Which cryogenic material can produce temperature as low as 4 degrees Kelvin? - Correct Answer Liquid Helium The T1 process is also known as - Correct Answer Spin-Lattice a 90 degree radio-frequency pulse will alter the net magnetization vector. Another effect is: - Correct 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.? - Correct Answer Permanent To describe the uniformity of the MRI system's main magnetic field, the term employed is - Correct Answer Homogeneity The purpose of magnetic resonance angiography is to image the - Correct Answer Blood Flow
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