Few-View Prereconstruction Guided Tube Current Modulation Strategy Based on the Signal-to-Noise Ratio of the Sinogram

Figure 3

The weight factors based on different references for tube current modulation and the corresponding sinogram acquired based on such strategy. (a) The weight factor based on different strategies; (b)–(d) the reciprocal of the sinogram’s SNR using constant weight factor and interpolation based and prereconstruction based weight factors, respectively. The display windows are set to for (a) and for (b)–(d).

(a)

(b)

(c)

(d)