+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
In MRI the role of Fourier Transform is to:
|
Change the MR signal into an image
|
|
The source function in MRI is a plot of:
|
Intensity vs time
|
|
The Fourier transformation of a spin echo results in information in the:
|
Frequency domain
|
|
In the spatial frequency Domain, sharp-edged objects:
|
Contain high frequency
|
|
Fourier transformation of symmetric spin echo will result in:
|
An imaginary part equal to zero
|
|
Optimum sampling of an MR signal requires that
|
At least twice a cycle
|
|
The result of Fourier Transform in MRI is called an/an
|
Object, hertz
|
|
In MRI smooth objects are represented by:
|
Low frequencies
|
|
Slice selection during MRI imaging requires a magnetic field gradient and:
|
A shaped RF pulse
|
|
MR signals received from moving tissues, e.g. flowing blood:
|
Contains non-zero imaginary parts when Fourier transformed
|
|
In MRI sampling the process of:
|
Changing the MR signal from continuous to discrete
|
|
Aliasing in MR imaging results in the appearance of:
|
A wrapped objects
|
|
If the symbol FT stands for Fourier transform, the symbol FT-1 stands for:
|
Inverse Fourier transform
|
|
The Fourier transformation of an MRI signal results in a function that is a plot of:
|
Intensity vs 1/time
|
|
To truncate an MR signal is to:
|
Chop of the frequency range abruptly
|
