Biomedical Engineering Reference
In-Depth Information
a lactose body surrounded by dissolvable plugs at each end and containing an
internal radiofrequency identification (RFID) tag. Its presence in the intestinal
tract can be determined by an external scanner. The timer plugs at each end are
designed to erode after about 30 hours resulting in disintegration and passage of
the capsule if retained longer.
The Agile TM capsule is intended to verify adequate patency of the gastroin-
testinal tract in patients with known or suspected strictures prior to administration
of the PillCam TM video capsule. If softening or any deformation of the body is
observed, patency would be considered highly suspect and capsule endoscopy
should probably be avoided. The clinical reports show that the patency system is a
safe and useful predictive tool in high risk contraindicated patients (Radwin 2009).
13.2.2 Olympus Capsule Endoscope
Olympus Corporation launched EndoCapsule in Europe in 2005 Olympus. It's a
11mm
×
26mm disposable and passive capsule with a CCD sensor camera for
small intestine endoscopy. The lighting system contains 6 LEDs and automatic
brightness control to adjust the illumination. An antenna sends two images per
second to the recorder. An interesting feature is that physicians can view real-
time images and estimate the capsule position thanks to the Real Time Viewer
( Fig. 13.4 ).
The EndoCapsule Software owns some extra functions in addition to the
management of the acquired data, which include: a multi display function for
optimal observation, structure enhancement and enlargement display function to
highlight the tiniest details, red colour detection function to highlight suspected
bleeding symptoms, and auto speed adjustment function to optimize the review
speed. The EndoCapsule has received marketing clearance from the FDA in
September, 2007.
Figure 13.4 Olympus EndoCapsule Real Time Viewer. (From www.olympus-europa.com )
 
 
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