2014 Volume 60 Issue 6 Pages 526
Finger vein authentication technology has been used for security purposes in banks, public institutions, companies, and other organizations. In this method, near-infrared rays generated from light-emitting diodes (LEDs) penetrate the finger, and are absorbed by the hemoglobin in blood. The veins appear as dark areas on an image captured by a complementary metal oxide semiconductor (CMOS) camera located on the opposite side of the finger1). We plan to develop a new vascular diagnostic technique using this method to analyze veins in patients with various diseases, such as circulatory diseases.
The device, a U-shaped box, is composed of 850-nm infrared LEDs mounted above and a CMOS camera without an infrared cut-off filter mounted below (Figure-1a, b). The LEDs and CMOS camera are both connected to a personal computer (PC) for power supply, control of the LED brightness, and data processing and storage. When the patient’s finger is placed on the device, the vein patterns are observed as dark lines on the PC display.
It is difficult to measure veins without enhanced angiography, three-dimensional computed tomography, magnetic resonance angiography, or radioisotope venography. Therefore, peripheral venous patterns have not been studied for various diseases. Nevertheless, study of the arteries and veins of the fingers may yield interesting results. Unique venous patterns may be noted in various diseases. Additionally, useful information such as the prognosis of circulatory diseases and early detection of rheumatic diseases may be obtained. Finger vein authentication is noninvasive, and it may be used in a wide range of clinical applications in the future.