Sony PDW-75MD XDCAM HD is an optical based HD video disc recorder designed for medical applications. The device records high definition video in 1440 x 1080i resolution, delivering outstanding HD image quality and accurate color reproduction. To accommodate the increasing adoption of HD imaging in the surgical environment, this second generation recorder employs a newly developed dual layer optical disc technology that greatly increases the recording time per disc. The PDW-75MD can store up to 4.5 hours of high definition video on the 50 gigabyte dual-layered disc and up to 2 hours on one 23 gigabyte single layered disc. Together with the optional PDW-U1 XDCAM drive unit, doctors can easily transfer recorded HD video material from the operating room to their office computer, laptop or other workstation for viewing and editing. Superb quality HD video can then be stored in patient archives, shared with colleagues within the hospital network or presented for education purposes.