Researchers from Rice University, Houston, Texas, USA, have developed and demonstrated a distally mounted rotating glass grating that, coupled with an existing endoscope, may boost capabilities for imaging cancers deep within the body (Proc. Natl. Acad. Sci. USA, doi:10.1073/pnas.1613497113).
http://www.osa-opn.org/home/newsroom/2016/september/a_rotating_grating_improves_cancer_imaging/
A Rotating Grating Improves Cancer Imaging