Adaptive Autoregressive Model for Reduction of Noise in SPECT

Table 1

Effect of changing the block size of the summed error term image with a prediction region of 3 × 3 pixels. For the predictable image a prediction region of four orthogonal neighbours with a block size of 5 × 5 pixels was used.

Total counts	Block size	Mean squared error
28705	5 × 5	0.87
28705	6 × 6	0.86
28705	7 × 7	0.86
54469	5 × 5	2.12
54469	6 × 6	2.10
54469	7 × 7	2.14
108938	5 × 5	6.61
108938	6 × 6	6.56
108938	7 × 7	7.04