Magnetization Study guides, Class notes & Summaries

ARMRIT-Practice Test (part 1: Mri Physics and Ins.) with Complete Solutions ARMRIT-Practice Test (part 1: Mri Physics and Ins.) with Complete Solutions ARMRIT-Practice Test (part 1: Mri Physics and Ins.) with Complete Solutions The T1 process is also known as: - ANSWERSpin Lattice Which type of electromagnetic coils produce smaller magnetic field which allow spatial localization to be performed? - ANSWERGradient coils The component Mxy is most associated with: - ANSWERTransver...

ARMRIT PHYSICS PRACTICE TEST 100% correct! The tissue characteristic that depends heavily on the relative content of fat molecules and free water is: - ANSWER Hydrogen concentration. T1 is the measurement of time for the longitudinal component of the net magnetization vector to recover what percentage of its original value after the application of a 90 degree radio-frequency pulse? - ANSWER 63% Immediately after an initial 90 degree radio-frequency pulse is turned off, the hydrogen prot...

Different tissues that have signals that appear similar on an MR image are described as: - Answer isointense In a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling like a spinning top. this motion is called: - Answer precession magnetic resonance imaging is derived from the process known as: - Answer nuclear magnetic resonance Once the nmv has moved away from equilibrium, the following will occur - Answer the transver...

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 tr...

al - Answer-Current induced iby receiver coil. Also comes from the procession of protons in the patient. Chemical pre saturation - Answer-Selectively apply 90 degree pulse at frequency of tissue to be saturated. Moves fat or HBO 90 degrees. 2nd puse wider bandwidth moves both fat and water 90 degrees. One will be saturated so will not be read. Saturating out normal anatomy, pathology is often seen more clearly. NEX number of excitations - Answer-is the number of times each line is filled w...

Magnetic particle is a nondestructive testing method used for - Answer locating surface and near surface discontinuities in steel Ferromagnetic material is - Answer strongly attracted by a magnet The permeability of a material describes: - Answer the ease with which it can be magnetized The retentivity of a material describes - Answer the ability to retain the magnetic field Magnetic particles are available in different colors - Answer for color contrast with the part surface thereby...

CWB 1 1. Which is not a recommended method for surface cleaning of a part for liquid penetrant examination? a) Cleaning with organic solvents. b) Blasting with shot or dull sand. c) Cleaning with de-greasers. d) Use of de-scaling solutions. e) Ultrasonic cleaning methods. - correct answer b) Blasting with shot or dull sand. 2. Which of the following weld defects is most likely to be missed by radiography in a weld: a) Undercutting. b) Porosity. c) Slag inclusions. d) Cracking. e) B...

MRI ARMRIT physics Exam Questions and Answers 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% The NMV is rotated to the physical negative Z axis by applying a...? - Ans ️️ -C)180 pulse Increasing which parameter is considered the "best" technique for improving image quality? - Ans ️️ -C)NEX Studies have concluded...

CWB 1 Exam (2024/2025) (Verified Answers). 1. Which is not a recommended method for surface cleaning of a part for liquid penetrant examination? a) Cleaning with organic solvents. b) Blasting with shot or dull sand. c) Cleaning with de-greasers. d) Use of de-scaling solutions. e) Ultrasonic cleaning methods. - Correct answer-b) Blasting with shot or dull sand. 2. Which of the following weld defects is most likely to be missed by radiography in a weld: a) Undercutting. b) Porosity. c)...

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... - Ra...