A data collection system for acquiring data with respect to a patient disposed on a support comprising: a patient interface unit, PIU; a patient interface unit dock being in optical communication with the patient interface unit and comprising a mirror; an imaging engine comprising an optical radiation source, an interferometer, a reference arm optical switch, and a sample arm optical switch; the interferometer comprising: a reference arm configured to transmit light from the optical radiation source at a first location to the reference arm optical switch; and a sample arm configured to transmit light from the optical radiation source at the first location to the sample arm optical switch; the data collection system further comprising: a first optical fiber of length of L1 connecting the reference arm optical switch of the imaging engine to the patient interface unit dock such that the mirror is in optical communication with the reference arm; a second optical fiber of length of L2 connecting the sample arm optical switch of the imaging engine to patient interface unit dock; the patient interface unit comprising a rotary coupler being configured to interface with a data collection probe being an optical coherence tomography imaging probe, wherein said rotary coupler is in optical communication with the sample arm via the second optical fiber; a display configured to display an image generated using optical coherence tomography data collected using the data collection probe, wherein the imaging engine is located remotely from the support, wherein the patient interface unit and the display are located proximal to the support, wherein L1 and L2 are greater than 5 meters, wherein the imaging engine further comprises a reflective variable path length mirror, and wherein the imaging engine is configured to direct light received in the reference arm through said reflective variable path length mirror to match the path length in the sample arm. a patient interface unit, PIU; a patient interface unit dock being in optical communication with the patient interface unit and comprising a mirror; an imaging engine comprising an optical radiation source, an interferometer, a reference arm optical switch, and a sample arm optical switch; the interferometer comprising: a reference arm configured to transmit light from the optical radiation source at a first location to the reference arm optical switch; and a sample arm configured to transmit light from the optical radiation source at the first location to the sample arm optical switch; a reference arm configured to transmit light from the optical radiation source at a first location to the reference arm optical switch; and a sample arm configured to transmit light from the optical radiation source at the first location to the sample arm optical switch; the data collection system further comprising: a first optical fiber of length of L1 connecting the reference arm optical switch of the imaging engine to the patient interface unit dock such that the mirror is in optical communication with the reference arm; a second optical fiber of length of L2 connecting the sample arm optical switch of the imaging engine to patient interface unit dock; the patient interface unit comprising a rotary coupler being configured to interface with a data collection probe being an optical coherence tomography imaging probe, wherein said rotary coupler is in optical communication with the sample arm via the second optical fiber; a display configured to display an image generated using optical coherence tomography data collected using the data collection probe, wherein the imaging engine is located remotely from the support, wherein the patient interface unit and the display are located proximal to the support, wherein L1 and L2 are greater than 5 meters, wherein the imaging engine further comprises a reflective variable path length mirror, and wherein the imaging engine is configured to direct light received in the reference arm through said reflective variable path length mirror to match the path length in the sample arm. a first optical fiber of length of L1 connecting the reference arm optical switch of the imaging engine to the patient interface unit dock such that the mirror is in optical communication with the reference arm; a second optical fiber of length of L2 connecting the sample arm optical switch of the imaging engine to patient interface unit dock; the patient interface unit comprising a rotary coupler being configured to interface with a data collection probe being an optical coherence tomography imaging probe, wherein said rotary coupler is in optical communication with the sample arm via the second optical fiber; a display configured to display an image generated using optical coherence tomography data collected using the data collection probe, wherein the imaging engine is located remotely from the support, wherein the patient interface unit and the display are located proximal to the support, wherein L1 and L2 are greater than 5 meters, wherein the imaging engine further comprises a reflective variable path length mirror, and wherein the imaging engine is configured to direct light received in the reference arm through said reflective variable path length mirror to match the path length in the sample arm.