True or False 1._____A large portion of the frequencies in the electromagnetic s

Question

True or False

1._____A large portion of the frequencies in the electromagnetic spectrum are so attenuated by the body that they cannot be used for (standard diagnostic) medical imaging.

2. _____ When two functions are convolved, the resulting function always has the same or smaller/lower/”skinnier” limits than the original functions.

3. _____ When an object is shifted in space, the magnitude of the Fourier transform is completely unchanged.
4. _____ The electromagnetic energy used in ultrasound imaging is in the same frequency range as that used for MRI.

5. _____ Photoelectric effect interactions provide the primary means of contrast in projection x-ray images.

Explanation / Answer

1.TRUE A large portion of the frequencies in the electromagnetic spectrum are so attenuated by the body that they cannot be used for (standard diagnostic) medical imaging.

2. FALSE When two functions are convolved, the resulting function always has the same or smaller/lower/”skinnier” limits than the original functions

3.TRUE When an object is shifted in space, the magnitude of the Fourier transform is completely unchanged

4.FALSE The electromagnetic energy used in ultrasound imaging is in the same frequency range as that used for MRI

5. TRUE Photoelectric effect interactions provide the primary means of contrast in projection x-ray images.

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