Tracking Regional Tissue Volume and Function Change in Lung Using Image Registration

Figure 7

Registration accuracy on airway landmarks. (a) Boxplot of landmark error of interphase registrations. Inter1a, Inter2a and Inter3a denote the error from post0TLC, post4TLC, and post24 TLC to baseTLC before registration, respectively. While Inter1b, Inter2b and Inter3b denote the error after three interphase registrations. (b) Boxplot of landmark error of intraphase registrations. Intra1a, Intra2a, Intra3a, and Intra4a denote the error from baseFRC to baseTLC, from post0FRC to post0TLC, from post4FRC to post4TLC, and from post24FRC to post24TLC before registration, respectively. While Intra1b, Intra2b, Intra3b and Inter4b denote the error after four intraphase registrations.

(a) Boxplot of landmark error of inter-phase registrations averaged over six subjects

(b) Boxplot of landmark error of intra-phase registrations averaged over six subjects