A cassette for retaining a specimen of surgically exposed tissue from a patient in an orientation that facilitates optical sectioning of the tissue by a confocal microscopic or other optical imaging microscope. The cassette includes a base member having an optically transparent window upon which a tissue...http://www.google.se/patents/US8149506?utm_source=gb-gplus-sharePatent US8149506 - Cassette for facilitating optical sectioning of a retained tissue specimen