Figure 6.

The data acquisition for the object shown in (a) can be performed using a two-channel receiver array (b) where each receiver is sensitive to a localized region and sensitivity regions do not overlap. Each receiver coil gives rise to one fully sampled image where each pixel is the product of the object location and the coil sensitivity map (c). In the case of B₁, for instance, the coil sensitivity value at location B, namely C_B1, is zero. If the scan is accelerated by a factor of 2, the FOV in each single-coil image is decreased by a factor of 2 (d). These accelerated single-coil images are aliased (pixel F₁ is the sum of pixels A₁ and B₁), but because one of the aliased pixels comes from outside the region of sensitivity, it will contribute no overlapping signal. The full FOV image can be reconstructed by piecing together the accelerated single-coil images (e).