Sensor-Based Technique for Manually Scanned Hand-Held Optical Coherence Tomography Imaging

Figure 2

Imaging setup and results of testing the manual scanning technique. (a) Photograph of the setup used for testing the proposed technique showing the imaging probe mounted over a translation stage. (b) Pattern consisting of two sets of uniformly spaced bars printed on paper, used as the imaging target for testing the technique. (c) Nonuniform velocity profile fed to the motorized translation stage for simulating imaging artifacts in manual scanning. (d) Control B-scan obtained without sensor feedback while translating the sample at a constant speed shown as the black dashed line and labeled control velocity in (c). (e) B-scan obtained by acquiring A-lines at a constant rate (without sensor feedback) while translating the sample in accordance with the nonuniform velocity profile shown in (c). Scaling artifacts, marked by dashed cyan box, can be seen on the right side of the image. (f) B-scan acquired with feedback from the motion sensor while translating the sample in accordance with the nonuniform velocity profile shown in (c). Note the similarity with the control B-scan shown in (d).