Figure 3.

 Reconstructed cross sections of the scattering coefficient for three different fingers typical for (A) category 1—definitely no synovitis; (B) category 2—probably no synovitis; (C) category 3—possibly synovitis; (D) category 4—probably synovitis; and (E) category 5—definitely synovitis. The fingertip is located to the right of the images that show a 36 mm wide section of the finger with the joint cavity located approximately in the centre. The rectangle in fig 3A indicates the region for which Min(µ_s), Min(µ_a), Max(µ_s), Max(µ_a), Min(µ_s)/Max(µ_s), and Min(µ_a)/Max(µ_a), were calculated.