Fig. 8.

Hemoglobin changes obtained with conventional and two multidistance fNIRS measurements. Results for each trial are indicated in individual column. In each column, results of conventional fNIRS at S3-D1, the proposed multidistance measurement at S3-S1-D1, conventional fNIRS at S3-D2, and the original multidistance measurement at S3-S2-D2 are presented in descending order. The results calculated on the basis of the data in Fig. 6 were shown in the trial #1. The trail #3 and #8 were the best cases in the motion artifact reduction with the proposed and the original multidistance measurements, respectively. The k values and the artifact reduction ratios in each case are indicated in Figs. 9 and 10, respectively.