MRI Study guides, Class notes & Summaries

MRI FINAL

MRI Study guide Questions and Answers 2023 MRI visible radiation reflects from the body 1. Visible light reflects off an object 2. reflected light detected by a that is sensitive to that kind of radiation - a RETINA MRI photograph is madeby 1. with reflex/refraction 2. electromagnetic radiation and receptors 3. visible lights extends from approximately 400 nm (blue) to 700 nm (red) x ray image radiation is transmitted through the body 1. electromagnetic radiation shines on a...

MRI QUESTIONS AND ANSWERS 100% CORRECT 2023 A T1 weighted image is produced using a ________ TR and a ________ TE and produces an image with ________ fat. a. long; long; bright b. short; short; dark c. long; long; dark d. long; short; bright e. short; short; bright e. short; short; bright When a 180-degree RF pulse is applied, the affected nuclei are directed to the minus Z-axis. a. true b. false a. true The attached image represents: brain matter light grey, surrounding ...

Magnetic Resonance Imaging Questions Answered 100% correct what is magnetic resonance imaging? a noninvasive exam technique that provides anatomic and physiologic information what does MRI stand for? magnetic resonance imaging MRI is a computer-based _____________________ imaging modality cross-sectional how does MRI create images? through interactions of magnetic fields and radio waves with tissues does MRI use ionizing radiation? no MRI was originally c...

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 ...

Imaging Modalities MRI Questions and Answers 2023 The contrast media used in MRI contains which of the following? gadolinium When is gating used in MRI? to improve image quality when motion is a problem Spectroscopy is most commonly used in which of the following organs? brain Which part of the MRI transmits and receives the signals? coils Magnetic field strength is measured in which of the following? gauss Which of the following was a downfall to the ear...

MRI Questions and Answers 2023 Slide 2-History of MRIs The first original device was created in 1945 when two groups of scientists led by Felix Bloch and Edward Purcell developed NMR systems otherwise known as nuclear magnetic resonance. In 1973, an imaging method using NMR systems provided the first magnetic resonance image or MRI. The most notable improvement since these images were created would be the development of being able to look at the images in a three dimensional perspective. ...

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 ...

Radiology MRI Questions and Answers 100% correct 2023 What does MRI stand for? Magnetic Resonance Imaging What spinning charged atom is the magnetic resonance of MRI sensitive to? proton What does the magnatism of an MRI do to a proton's spin? it coordinates their spins. Typically protons have a uncoordinated spin What are the two types of MRI machines? 1) open magnet (used for extremities and larger people) 2) closed magnet (typical MRI machine, stronger field) ...

Magnetic Resonance Imaging (MRI) Questions and Answers 2023 What does MRI rely on? [3] electromagnetic fields, radio waves, and hydrogen levels in the body What % of the human body is hydrogen? 70% What distinguishes MRI from CAT scans/x-rays? no ionising radiation present What is magnetic force measured in? tesla At what strength is the MRI magnet maintained? constant tesla strength What is the magnetic strength of clinical scanners? approx. 1.57, 3T,...