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