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Using gadget in medical field

Conventional MR studies are acquired by the serial application of encoding gradients across the field of view (FOV) using a single radiofrequency (RF) coil. The resulting signals received by the RF coil provide data corresponding to the spatial frequency or Fourier components of the object being imaged. Each component of the data, one of a large number of sinusoidal intensity oscillations with specific spatial frequencies, is associated with a particular point in k-space. The central region of k-space, consisting of low-spatial-frequency data, contains information about the gross structure and contrast of an image, most of the information required to produce an MR image. The peripheral portion of k-space, consisting of high-spatial-frequency data, contains information about image detail. Data is usually acquired in a 2D or 3D Cartesian rectangular grid in k-space, moving from one end of k-space to the other, collecting data in sequential parallel lines. An additional line of k-space data in the frequency-encoding direction is serially collected during each acquisition, while sequential lines in the phase-encoding direction are acquired at regular intervals.