Abstract
Wireless capsule endoscopy (WCE) is a promising technology for direct diagnosis of the entire small bowel to detect lethal diseases, including cancer and obscure gastrointestinal bleeding (OGIB). To improve the quality of diagnosis, some vital specifications of WCE such as image resolution, frame rate and working time need to be improved. Additionally, future multi-functioning robotic capsule endoscopy (RCE) units may utilize advanced features such as active system control over capsule motion, drug delivery systems, semi-surgical tools and biopsy. However, the inclusion of the above advanced features demands additional power that make conventional power source methods impractical. In this regards, wireless power transmission (WPT) system has received attention among researchers to overcome this problem. Systematic reviews on techniques of using WPT for WCE are limited, especially when involving the recent technological advancements. This paper aims to fill that gap by providing a systematic review with emphasis on the aspects related to the amount of transmitted power, the power transmission efficiency, the system stability and patient safety. It is noted that, thus far the development of WPT system for this WCE application is still in initial stage and there is room for improvements, especially involving system efficiency, stability, and the patient safety aspects.
Highlights
The gastrointestinal (GI) or digestive system extracts the essence of our diet and keeps our body active, but nowadays an increasing number of people are being affected by GI disorders [1,2] due to malignant diseases like gastric cancer [3,4], tumors [5,6] and bleeding [7,8] to name a few
This paper has presented an overview on the development of emerging wireless power transmission (WPT) techniques for application in wireless capsule endoscopy (WCE)
The development of WPT in this area is still immature that there are many aspects that require improvements and further investigation to make the WPT system become practical in this area
Summary
The gastrointestinal (GI) or digestive system extracts the essence of our diet and keeps our body active, but nowadays an increasing number of people are being affected by GI disorders [1,2] due to malignant diseases like gastric cancer [3,4], tumors [5,6] and bleeding [7,8] to name a few. Advanced endoscopy has a great potential to serve this purpose of early detection screening It can provide comfortable, painless diagnosis to the patient and may reduce the time span for the patient to stay in a health care facility and more importantly, it makes it possible for a thorough diagnosis to be performed seamlessly without interrupting the patient’s daily activities. Painless diagnosis to the patient and may reduce the time span for the patient to stay in a health care facility and more importantly, it makes it possible for a thorough diagnosis to be performed seamlessly without interrupting the patient’s daily activities This is possible because wireless capsule endoscopes (WCEs) are able to travel to the parts where the typical endoscopes fails to reach such as small bowel area [9,10,11], and this can be done without full supervision by a specialist. To obtain a better diagnostic yield, important features such as image resolution, frame rate, working time, and view angle need to be improved [16,21]
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