Purpose of rf b1 field - Study guides, Class notes & Summaries

T2 is the measurement of time from the transverse component of the NMV to decrease what percentage of its max value after the application of a 90 degree RF pulse - 37% combining a metal ion with a ligand reduces their tendency to bind proteins, enzymes, or membranes, the degree to which they disassociate is a measure of: - toxicity 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 ...

MRSO Mock Test 1 - Questions with 100% Correct Answers Which of the following describes when a non-ferrous, electrically conductive object is repulsed by a static magnetic field? A. Fourier Transfomation B. Larmor equation C. Lenz force D. Ohms law What is the purpose of resonance? A. Resonance is not used in MRI B. To tilt the nuclei of interest away from B0 C. To slow down the processional frequency or nuclei D. To align nuclei with B0 Induction of electrical current in our patient from chan...

MRSO - RADIO FREQUENCY - MODULE 4 Question and answers already passed 2023 Purpose of RF (B1) field - correct answer excite hydrogen protons RF energy is absorbed by tissues - correct answer within the volume of the RF transmit coil. This is a thermogenic process. Thermogenic process - correct answer Results in production of heat. Ex: RF energy absorption MRI local and whole-body tissue heating is due to - correct answer magnetic induction Types of RF coil designs - co...

MRSO - RADIO FREQUENCY - MODULE 4 Questions and Answers 100% Correct | Latest Update 2024

Electromagnetic energy is symbolized by a sine wave that has two components of measurements, they are: - Answer Wavelength and frequency Of the following techniques which one is applied to prevent "crosstalk" between multi-slices with little or no interslice "gap" - Answer Interleaving The artifact known as aliasing, wrap around or fold over will always show up in what gradient direction? - Answer Phase encoding Which of the following causes of artifacts on MR images is most commonl...

Purpose of RF (B1) field - excite hydrogen protons RF energy is absorbed by tissues - within the volume of the RF transmit coil. This is a thermogenic process. Thermogenic process - Results in production of heat. Ex: RF energy absorption MRI local and whole-body tissue heating is due to - magnetic induction Types of RF coil designs - -linearly polarized -circularly polarized (quadrature) Function of coils - -transmit only -receive only -transmit/receive Mos...

Which of the following describe when a non-ferrous object is repulsed by static magnetic field? a. Fourier transformation b. Lenz's force c. Ohm's law d. Larmor equation - Answer b. Lenz's force What is the FDA SAR limit for the whole body in first level controlled operating mode? a. 8 W/kg for 15 mins b. 4 W/kg for 15 mins c. 3 W/kg for 10 mins d. 7 W/kg for 20 mins - Answer b. 4 W/kg for 15 mins Gadolinium contains what kind of magnetism? a. Diamagnetic b. Paramagnetic c....

Purpose of RF (B1) field - correct answer excite hydrogen protons RF energy is absorbed by tissues - correct answer within the volume of the RF transmit coil. This is a thermogenic process. Thermogenic process - correct answer Results in production of heat. Ex: RF energy absorption MRI local and whole-body tissue heating is due to - correct answer magnetic induction Types of RF coil designs - correct answer -linearly polarized -circularly polarized (quadrature) Function of coils ...

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...

MAGNETIC RESONANCE SAFETY OFFICER (MRSO) - RADIO FREQUENCY - MODULE 4