Seventh generation of CT Scan.

 The seventh generation of ct scan uses multidetector array ( MDA). When multiple detector arrays are used  the collimator spacing is wider and therefore more of the x-rays that are produced by the x-ray tube are used in producing image data. With conventional, single detector array scanners, opening up the collimator increases the slice thickness, which is good for improving the utilization of the x-ray beam but reduces spatial resolution in the slice thickness dimension. With the introduction of multiple detector arrays, the slice thickness is determined by the detector size and not by the collimator. This represents a major shift in CT technology.

  4 continuous 5 mm detector array gives 20 mm collimator spacing. The number of x-ray detected is 4 times higher then that of single array of 5 mm. Further 10 mm, 15 mm, 20 mm, slices may be obtained from the same acquisition.