What phenomenon occurs when there is overlap of slices in a multi-slice acquisition?

• A. Aliasing
• B. Crosstalk
• C. Banding
• D. Saturation

Answer: (B)

Crosstalk occurs in magnetic resonance imaging (MRI) when overlapping slices in a multi-slice acquisition result in signal interference between adjacent slices. This interference can lead to a decrease in image quality because the signals from one slice can impact the signals from another, creating artifacts or distortions in the final images. In a multi-slice acquisition, if the slices are too close together without adequate separation, the signals can bleed over from one slice to the neighboring slice, resulting in crosstalk. This is an important consideration when planning and executing MRI protocols, as it helps radiologists and MRI technologists to obtain the best possible image quality by appropriately spacing slices to minimize this phenomenon.