Magnetization Study guides, Class notes & Summaries

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)...

ARMRIT Practice test| 30 Questions| accurate 100% 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 Superc...

practice test 1 armrit| 30 Questiondifferent tissues that have signals that appear similar on a 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 Prescession Magnetic resonance imaging is derived from the process known as: - ANSWER Nuclear magnetic resonance Once the net magnetization vector (nmv) has moved away fr...

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 protons will begin to: - ANSWER-Dephase A 90 de...

Signal - 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 fill...

MRI chapter 1: Basic Principles Questions and Answers 2023 atom a tiny element that is the basis for all things molecule 2 or more atoms arranged together hydrogen the most abundant atom in the body electron negatively charged particles that spin around the nucleus nucleons particles in the nucleus proton positively charged element of the atomic nucleus neutron neutral charged element of the atomic nucleus atomic number sum of protons in ...

ISP 203B Exam 1 Correctly Answered The current theory of plate tectonics states that approximately ________ large lithospheric plates comprise the outer 60 to 200 kilometers of the Earth. - ANS ️️ 12 The majority of earthquakes and volcanic eruptions occur: - ANS ️️ Near the boundaries between lithosphere plates. The continental drift hypothesis proposed by Alfred Wegener in 1912 was based on all the following except: - ANS ️️ continent movement rates determined by GPR measur...

Magnetic Resonance Imaging (MRI) Questions and Answers 2023 MRI - Provide high resolution anatomic structure (as with X-ray CT) - Provide high contrast between different soft tissue (X-ray CT cannot) - No exposure to radiation and hence safe - More complicated instrumentation - Takes longer to acquire scan than CT, more susceptible to patient motion MRI components 1. primary magnet 2. gradient magnets 3. radiofrequency coils 4. scanner 5. computer system 6. patient table ...

First things first, know what SWI and QSM stand for.. correct answer: SWI: suceptability weighted imaging QSM: Quantitative suceptability mapping What 2 things is SWI good at detecting? correct answer: Iron Deposition and Calcification What two very general catagories can you break the magnetic suceptability of a tissue into? correct answer: Paramagnetic components and diamagnetic components What sort of molecules contribute to the paramagnetic component? correct answer: The parama...

ISP 203B Exam 1 with complete solutions The current theory of plate tectonics states that approximately ________ large lithospheric plates comprise the outer 60 to 200 kilometers of the Earth. - ANS ️️ 12 The majority of earthquakes and volcanic eruptions occur: - ANS ️️ Near the boundaries between lithosphere plates. The continental drift hypothesis proposed by Alfred Wegener in 1912 was based on all the following except: - ANS ️️ continent movement rates determined by GPR m...