Fig. 9

Measured data: a heatmap depicting nWMSE for each kernel combination investigated for Siemens Biograph Vision 600 TOF reconstruction (minimum at \(8.1 \times 8.1 \times 6.8 {\rm mm}^3\)); b horizontal, vertical and axial profiles through the sphere filled to be homogeneous post-AFC (top row), the sphere filled to be homogeneous pre-AFC (middle row) and a cold Perspex stem (bottom row). The down-sampled GT emission (light blue, dotted), TOF reconstructed image (red, solid), GT emission smoothed by the kernel and down-sampled (royal blue, dashed); the extent of the VOI in each orientation is shown by the black dash-dotted line