Development of Ultra high sensitivity CMOS HD camera for endoscopic surgery

Hisae Aoki, MD, Toshiyuki Mori, MD, PhD, Hiromasa Yamashita, PhD, Toshio Chiba, MD, PhD

NHO Murayama Medical Center, Kyorin University, National Center for Child Health and Development

Objective of the device
Laparoscopic surgery has been spread rapidly with development of equipment. Laparoscopic surgery is performed while watching the image that is projected on the monitor out, and that is required high quality image. So in the field of the camera, development has been progressed remarkable such as high-definition camera and 3D camera. In a high-quality surgical endoscope system is now obtained by the 3CCD system. However it is difficult to watch operating area under low-light. The endoscope light source currently being commonly used 6 lux. In the scope of the small diameter, the amount of light (6 Lux) will not be enough light to see. Also there is another problem. It’s possible to happen complications such as burn caused the light source. We developed new camera that use CMOS image sensor and could be made more sensitivity. Using those camera can be made comfortable to watch and operate and doesn’t need powerful light source.

As a feature, it is an ultra-sensitive and high-definition. It has a wide range of spectral sensitivity characteristics. Unlike the CCD, this camera is not required the cooling system. Miniaturization is possible. And less power consumption could be possible. It’s used a 2/3 inches format color CMOS image sensor as the imaging device. The number of output pixels 1.47 million pixels. Minimum illumination is 0.01LUX. The camera head is 50mm (W) × 50mm (H) × 50mm (D). Head weight is 170g. It can be connected to all the rigid endoscope.

Preliminary results
Using ultra high sensitivity CMOS HD camera, images were taken dark field to the bright field. In general illuminance of the meeting room is 300-800 lux and under the street light is 1-5 lux. The illuminance under moonlight is 0.01- 0.1lux. The quality of images taken with a 300 lux and images taken with 1 lux illumination was comparable.

Conclusions/Future directions
Ultra high sensitivity CMOS HD camera could be advanced development in laparoscopic surgical field. It can be expected to spread in the field of laparoscopic surgery as well as for fetal surgery area, the field of ophthalmology. Moreover, further miniaturization is possible in the near future and it would be cost savings. We have now developed a greatly improved version with CMOS image sensor. This camera is a powerful tool for watching surgical area at low-light conditions. In future we will need to experiment for practical use.

Session: Poster Presentation

Program Number: ETP012

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