Video endoscopic equipment is similar to the fiber endoscopes in their mechanics. They have
an additional CCD, or Charged Couple
Device and electronics mounted on their
tops that support their operation. The optical bundle (found in fiber endoscopes)
is replaced by the to-and-fro wiring. The site of the ocular lens is occupied
by other electronics and some switches that are located on the most upper
location of the endoscope’s control head. Video endoscopes do not require the
physician to hold any of its part near his/her eyes, and hence there are lesser
hygiene issues like splash contaminations. The new video endoscopes also have
wide possibilities for improvement in designs and for the creation of better
handling techniques.
The CCD Chip
The CCD chip of the endoscope contains 33,000 to 100,000
photo cells that are also known as pixels or picture elements. These pixels receive
the photons that are reflected back from the inner mucosal surfaces. The individual
photo pixel receptors of the chip only respond to the degrees of dark and light
and not to the colors. The colored CCDs have larger
number of pixels that provide for the overlay of a number of filter stripes of
primary colors. The pixels under a given stripe respond only to a particular
color of light. The sequential or black and white CCDs can also be made much
smaller and of potentially higher resolution by illuminating all of the pixels.
These sequential images (gut pictures having a little blue, some green and
mostly red) can be stored in a temporary and transient manner in the banks of
the processor’s memory chips. They are then fed sequentially to red, green and
blue electron guns of the television
monitor. The computers have the sophisticated
and advanced technology for processing the images and a large number of chips that can optimize the inner unitary CCD
output.
Best Quality of Images
The screen image quality of the video endoscope is on par
with the fiber endoscope in both resolution and color. Everyone can view an
image simultaneously through a video endoscope with the same clarity that was previously restricted and reserved for endoscopists
only. Digital signals given by video endoscopes simplify image manipulations, and its recording can open ways
for the creation of better and newer
methods of image analysis, transmission and enhancement. Olympus endoscopes have high quality and are offered in both video
and fiber forms for different diagnosing conditions.
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