5 Questions
What is the unit of K space?
Radiants per cm
How are data collected and stored in K space?
After performing frequency or phase encoding
What does the center of the echo represent in the frequency axis of K space?
Maximum signal amplitude
How are the central lines of K space filled with data?
After applying shallow phase encoding gradient slopes
What is the purpose of altering the slope of the phase encoding gradient after each TR?
To fill out different lines of K space
Study Notes
K Space Basics
- The unit of K space is cycles per centimeter (cycles/cm).
Data Collection and Storage in K Space
- Data is collected in K space by sampling the magnetic resonance signal in a Cartesian grid.
- The data is stored in a 2D array, with each point representing the spatial frequency-domain information.
Center of the Echo in K Space
- The center of the echo represents the zero-frequency point in the frequency axis of K space.
Filling the Central Lines of K Space
- The central lines of K space are filled with data through the process of encoding, which involves the manipulation of magnetic field gradients.
Purpose of Altering the Phase Encoding Gradient
- Altering the slope of the phase encoding gradient after each TR (repetition time) is done to fill in the rest of the K space, allowing for the creation of a complete image.
Test your knowledge of MRI physics and instrumentation with this quiz. Explore topics such as nuclear magnetic resonance imaging, radiological modalities interpretation, and theoretical background. Perfect for radiologic technology students and anyone interested in medical imaging.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
