The receiver bandwidth is related to the slope of which gradient?

• A. Phase encode
• B. Frequency encode
• C. Slice select
• D. Readout

Answer: (C)

The receiver bandwidth is closely associated with the frequency encoding gradient in magnetic resonance imaging (MRI). This gradient is responsible for distinguishing the frequency of the signals received from different locations within the imaging slice. As the slope of the frequency encoding gradient increases, the range of frequencies that can be captured, also known as the receiver bandwidth, broadens. A wider receiver bandwidth allows for faster data acquisition and can help reduce the effects of motion and other image artifacts, leading to improved image quality.

In contrast, the other gradients—phase encode, slice select, and readout—serve different purposes during the imaging process. The phase encoding gradient helps spatially encode signals in the phase direction, while the slice select gradient is crucial for determining which slice of tissue is being imaged. The readout gradient is part of the data acquisition process but is distinct from the measurement of receiver bandwidth itself, which is fundamentally linked to the frequency encoding gradient's behavior.