Figure 8.

AVF pulse wave measured with blue light. (a) Photograph of a left wrist. (b) AVF pulse wave measured at the two points close to the anastomosis. The low- and high-cutoff frequencies of band pass filter were 1 Hz and 10 Hz, respectively. Because the similar waveforms are observed at different points, the measured data is not sensitive to observation points. (c) Three-dimensional image by the photometric method with blue light. As compared with the photo shown in (a), good agreement is confirmed, which means that the three-dimensional image based on the luminance is efficient to represent the AVF form.