MRI-ARRT study guide Questions with 100% Correct Answers | Updated & Verified | 2024

The NMV is rotated to the physical negative Z axis by applying a...? - C)180 pulse Increasing which parameter is considered the "best" technique for improving image quality? - C)NEX Studies have concluded that static magnetic fields up to what tesla produce no substantial harmful biological effects. - C)2.0 Tissues that have low (short) relaxation times have: - Higher relaxation rates Nuclei in their natural enviroment ( in the absence of a significant magnetic field) are aligned... - Randomly Following the injection of a gadolinium enhancement agent, the pulse sequence most commonly employed is a... - C)T1 weighted Employing a pulse sequence with a long TR & a long TE will result in tissues with a short T2 value appearing WHAT & tissues with a long T2 appearing WHAT on the resultant image. - D)Dark/bright Which gradient axis direction is typically (for educational purposes) designated as the slice selection gradient? - C)Logical Z gradientElectromagnetic coils placed strategically to contain the fringe fields. - 2)Active shielding 1 milliliter of H2O contains how many hydrogen protons? - 6 ×10 to th 23power Which of the following statements is true for gadolinium MRI IV enhancement products? - B) produces randomly fluctuating magnetic fields in its immediate enviroment. The maximum exposure to radiofrequency in 1 gram of tissue is: - D) a maximum spatial peak of 8 w/kg Currently, patients & personnel arr exluded from exposure to MRI for the 1st trimester of pregnancy. - True