Figure 1From: Comparison between tracheal ratio methods used by three observers at three occasions in English BulldogsBar graph with number of dogs classified as having tracheal hypoplasia by three observers in RLR radiographs. Number of dogs classified as tracheal hypoplastic by readers A, B and C at the 3rd measuring occasion in RLR projections, using <0.11, <0.127 and <0.144 as cut-off ratios for the TD/TI and <2 for the TT/3R methods.Back to article page