Reduction of image artifacts from support structures in tomographic imaging

摘要: An apparatus for reducing image artifacts caused by over-ranging or clipping of the data collected in a tomographic scan using patient support, models density profile support with polynomial. Coefficients polynomial are stored look-up table according to gantry angle and used estimate over-range data. The estimated is blended in-range convolving an mask indicating which box car convolution kernel produces trapezoidal weighting mask. This multiplied then summed correct portions collected.