Figure 4
From: Enhanced hyperspectral tomography for bioimaging by spatiospectral reconstruction
Biological feature identification via regularised reconstruction. (a) Reconstructed slices for channel 120 (33.95 keV-channel width 1.2 keV), along both the axial and sagittal dimensions, following FDK (left column) and TV-TGV (right column) reconstruction. General noise reduction and smoothing due to TV regularisation is observed over all spatial regions. (b) Absorption spectra measured for a ROI in two sections of the sample (blue squares in (a)-lens and jaw adductor muscle). A line signifying the theoretical position of the iodine K-edge is overlaid for comparison. (c) Channelwise CNR calculations of the stained jaw adductor muscle using the signal ROI (red-S) and the background ROI (white-Bg), for the image slice shown in the sagittal plane. Average CNR values across the energy range were 8.91 and 35.97 for FDK and TV-TGV respectively.
