Development of a laparoscope with multi-resolution foveation capability for minimally invasive surgery

Yi Qin, Hong Hua, Mike Nguyen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Laparoscope is the essential tool for minimally invasive surgery (MIS) within the abdominal cavity. However, the focal length of a conventional laparoscope is fixed. Therefore, it suffers from the tradeoff between field of view (FOV) and spatial resolution. In order to obtain large optical magnification to see more details, a conventional laparoscope is usually designed with a small working distance, typically less than 50mm. Such a small working distance limits the field of coverage, which causes the situational awareness challenge during the laparoscopic surgery. We developed a multi-resolution foveated laparoscope (MRFL) aiming to address this limitation. The MRFL was designed to support a large working distance range from 80mm to 180mm. It is able to simultaneously provide both wide-angle overview and high-resolution image of the surgical field in real time within a fully integrated system. The high-resolution imaging probe can automatically scan and engage to any subfield of the wide-angle view. During the surgery, MRFL does not need to move; therefore it can reduce the instruments conflicts. The FOV of the wide-angle imaging probe is 80° and that of the high-resolution imaging probe is 26.6°. The maximum resolution is about 45um in the object space at an 80mm working distance, which is about 5 times as good as a conventional laparoscope at a 50mm working distance. The prototype can realize an equivalent 10 million-pixel resolution by using only two HD cameras because of its foveation capability. It saves the bandwidth and improves the frame rate compared to the use of a super resolution camera. It has great potential to aid safety and accuracy of the laparoscopic surgery.

Original languageEnglish (US)
Title of host publicationDesign and Quality for Biomedical Technologies VI
DOIs
StatePublished - May 22 2013
EventDesign and Quality for Biomedical Technologies VI - San Francisco, CA, United States
Duration: Feb 2 2013Feb 3 2013

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8573
ISSN (Print)1605-7422

Other

OtherDesign and Quality for Biomedical Technologies VI
CountryUnited States
CitySan Francisco, CA
Period2/2/132/3/13

Keywords

  • foveated imaging system
  • hybrid diffractive-refractive
  • multiple resolution

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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