Figure 1 shows the setup for our real-time LSI system. The laser used for our experimental setup was a continuous-wave HeNe laser (λ = 633 nm, 30 nm, 30 mW; Edmund Industrial Optics, Barrington, New Jersey). Laser light was delivered to the target with an optical fiber and diverged with a ground-glass diffuser (Thorlabs, Newton, New Jersey). Reflected speckle patterns were imaged with a 12-bit, thermoelectrically cooled CCD Camera (RetigaEXi or Retiga 2000R, QImaging, Burnaby, BC, Canada) with a resolution of 1392 (W)×1040 (H) (Retiga EXi) or 1600 (W)×1200 (H) (Retiga 2000R) pixels and a close-focus zoom lens (18–108 mm, f/2.5-close, Edmund Optics, model no. 52–274, Barrington, New Jersey). Images were transferred to the personal computer (PC) in real time via the FireWire 400 interface at a frame rate of ∼9.7 fps (RetigaEXi) or 8.3 fps (Retiga 2000R). The PC was running an Intel Core 2 4300 running at 1.80 Ghz, 1 GB DDR2 RAM, and Windows XP Professional with Service Pack 3. To process and render the SC and SFI images, we developed software in Microsoft Visual Studio 2005 and LabVIEW 8.6 (National Instruments, Austin, Texas). The graphics card used for image processing was the GeForce 8800GTS made by EVGA, which included the NVIDIA G80 GPU and 640MB of GDDR3 RAM. The performance specifications included a core clock of 500 MHz, memory clock of 800 MHz, shader clock of 1200 MHz, 12 stream multiprocessors, and 96 stream processors (eight per multiprocessor).