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← ScienceWhich mechanism impairs MRI image quality when strong external radio-frequency fields interfere?
A)Magnetic field gradient distortion
B)Radio-frequency signal saturation
C)Pulse sequence timing disruption
D)Data reconstruction artifact induction✓
💡 Explanation
When external RF fields interfere, spurious signals are induced during the Fourier transform process, causing data reconstruction artifacts because unwanted frequencies contaminate the image data. Therefore image artifacting is the consequence, rather than gradient distortion, saturation, or pulse disruption, requiring direct magnetic field interference or timing circuit corruption.
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