In this study, we were not able to analyse the depth difference by different ages and diagnoses.
The depth difference in the moment rate function implies different constitutive relations of friction between the shallow and the deeper parts (e.g., Ide and Takeo 1997).
Before calculating the initial depth difference, the averaged background image is obtained by averaging multiple background images from different depth map frames.
The final depth difference is obtained by subtracting the averaged noise frame from the initial depth difference.
To reduce this noise, we calculate the following depth map frames: the initial depth difference, the averaged noise frame, and the final depth difference.
Here, the depth difference should be between 5 and 20 cm.
The climber's body area is detected using the depth difference between the background and foreground images.
Therefore, the depth difference also depends on the length of the pore channels.
Even in neighboring boreholes, the depth difference may be over 3 4 m (Fig. 7).
The depth difference measured by US and freehand SPECT in ten patients was 1.6 ± 1.6 mm.
The initial depth difference is calculated by subtracting the averaged background image from a foreground image.
