Handbook of Biomedical Optics

(a)

(f) (g) (h) (i) (j)

200 µm

(b) (c) (d) (e)

Phase shift (rad)Speckle variance (arb)

Π

–Π

1

0

FIGURE 14.8 Doppler phase shi measured for stationary Intralipid within a 600 m tube at an 80° Doppler angle (a). Doppler phase shi mea-

sured from Intralipid moving through the tube at a rate of 12 mL/h for Doppler angles of 75°, 80°, 85°, 89.5°, respectively (b–e). Corresponding

normalized (to xed value for all images) speckle variance images (f–j). (From Mariampillai, A. et al., Opt. Lett., 33, 1530, 2008. With permission.)

0

0.2

0.4

0 20 40 60 30

R

2

= 0.96

R

2

= 0.90

20100

0

(f)

35%

70%

(e)

(a) (b) (c)

(d)

1

2

–0.1

–0.05

Lateral position (µm) Lateral position (µm)

Velocity ...