Figure 1.
The illustration compares four C T scanning types. At the top left, a patient lies on a scanning table entering a cylindrical C T scanner operated by a clinician. At the top right, Full Dose C T shows a circular cross-section with evenly spaced radial projection lines covering 360 degrees around a central region. At the bottom left, Low Intensity C T shows the same full circular coverage with evenly spaced projections at reduced intensity. At the bottom centre, Sparse View C T shows fewer evenly spaced radial projections over 360 degrees. At the bottom right, Limited Angle C T shows projections confined to a restricted angular sector rather than the full 360 degrees.Schematic illustration of CT reconstruction techniques, comparing FULL-DOSE CT with the main types of low-dose CT, including low-intensity, sparse-view and limited-angle CT