3 fields used in mri - Study guides, Class notes & Summaries

MRSO - RADIO FREQUENCY - MODULE 4 Test Review |Question and Answers| 100% Correct Purpose of RF (B1) field *Ans* excite hydrogen protons RF energy is absorbed by tissues *Ans* within the volume of the RF transmit coil. This is a thermogenic process. Thermogenic process *Ans* Results in production of heat. Ex: RF energy absorption MRI local and whole-body tissue heating is due to *Ans* magnetic induction Types of RF coil designs *Ans* -linearly polarized -circularly polarized (quadratu...

EPPP Sample Questions – Neuropsychology Written Exam. A. The Magnetic Resonance Imaging (MRI) and CAT (Computerized Axial Tomography) or CT scan, take a series of images at different levels of the brain giving information and a direct visualization of structures and features. The MRI does this with magnetic fields; the CAT scan uses x-rays. In general, the MRI provides more detail than the CAT scan and can be used in examining the central nervous system, as well as, used to identify tum...

Nuclear magnetic resonance. - Answer Magnetic Resonance Imaging is derived from the process known as: Magnetic field, proton, radio-wave - Answer On a very basic level, the three basic components required to attain MR signals are: Superior soft-tissue contrast resolution. - Answer In comparison to Computed Axial Tomography, an advantage of MRI is: Special and costly site planning and shielding. - Answer In comparison to Computed Axial Tomography, a disadvantage of MRI is: Iron, cobal...

MRSO Final Exam Questions With Answers 2023/2024 (Latest Update Rated A+). The magnetohydrodynamic effect describes artifacts seen where in the cardiac cycle? a. T wave b. R wave c. QRS complex d. P wave - Answer a. T wave What is nystagmus? a. Vision loss b. Experiences different scents that are not really there. c. Involuntary movement of the eyes from side to side. d. Involuntary coughing and sneezing. - Answer c. Involuntary movement of the eyes from side to side. Which of the f...

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...

A single unit is defined as a single, firing neuron whose spike potentials are distinctly isolated by a recording microelectrode. The ability to record signals from neurons is centered around the electric current flow through the neuron. - Answer-single unit recording? Are lesion techniques primarily anatomical or functional? - Answer-We can't use temporal resolution because weoften times do not have a before or after Be able to identify typical data presentations of the techniques listed ...

MRSO PREP EXAM WITH ALL CORRECT ANSWERS.docx Zero Boil-Off - Answer-System that reduces/eliminates the need to recharge Helium in a magnet. Quench - Answer-Quickly eliminating the magnetic field. Not immediate, takes 3 to 5 minutes to completely eliminate magnetic field. Loud Noise as Helium rushes out of Quench Vent. Can cause crack in the wire (very costly to repair/replace). Ohm's Law - Answer-Resistance that is equal to Voltage divided by the amperage in a wire. V=IR U...

MRSO-2 Exam Questions with All Correct A What group issued the ACR white paper MRI safety? a.Food and drug association. b.OSHA c.EPA d.American college of radiology blue ribbon panel on MR safety. - Answer-d. American college of radiology blue ribbon panel on MR safety. This individual must have an in-depth understanding of the risks associated with the MRI environment? 1 personnel 2 personnel -MR personnel patient - Answer-b. level 2 personnel Which of the following statemen...

MRSO Exam 1 Questions with Complete S The control room is found where? a. Zone I b. Zone II c. Zone III d. Zone IV - Answer-C. Zone III 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 Which of the following are recommended by the ACR Guidance document in MR safety 2013 in proper scanning of a patient? I.Metal detector II.Ferromagnet...

Cardiac Index 2-4 SVR/Afterload 800-1200 MAP mean CVx80/CO PA pressure 15-30 Wedge PCWP pressure 6-12 Hypovolemic Shock Parameters Preload CVP decreased, SVR afterload increased, CI decreased, Oxygen delivery Decreased, Venous Oxygen saturation increased Types of hypovolemic shock Hemorrhage, burns, pancreatitis Cardiogenic shock parameters CVP preload increased, SVR afterload increased, CI decreased, oxygen delivery decreased, SV02 decreased Types of cardiogenic shock Post mi, ...