Portable Subcutaneous Vein Imaging System

Portable Subcutaneous Vein Imaging System

S. N. Sravani, Sumbul Zahra Naqvi, N. Sriraam, Manam Mansoor, Imran Badshah, Mohammed Saleem, G. Kumaravelu
Copyright: © 2013 |Pages: 12
DOI: 10.4018/ijbce.2013070102
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Abstract

In medical domain, the identification and detection of veins is necessary for certain clinical procedures such as venipuncture and intra-venous applications. Vein imaging is also essential for diagnosis of vascular diseases. The current existing modalities for Vein Imaging are highly expensive and bulky. Thus a portable, cost-efficient Vein imaging system is proposed in this paper to view and locate subcutaneous veins. The system comprises of an IR Camera which has been fabricated with NIR LED’s of 880nm wavelength. The NIR LED’s are used as they provide better contrast and visibility of veins in the images at 880nm wavelength compared to other IR LED’s. Real time imaging of veins is acquired, processed using a program written in computer vision and displayed on the Laptop. Screenshot of vein images obtained are assessed through a pilot study for 96 subjects based on age, gender and complexion using the Statistical package for social sciences (SPSS) software. The vein images obtained are clinically validated by doctors. It can be concluded that the proposed system found to be useful for real-time clinical procedures.
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System Set Up

The hardware consists of a web camera, which is modified to function as a IR camera for viewing veins of the subject and a laptop for processing and display. The infra-red camera is fabricated with Near-infra red LED’s of 880nm wavelength for illumination. The Infra-red camera is made using the i-ball web camera. This camera has a high quality CMOS sensor which is very sensitive to NIR light. It has maximum video resolution of 2304 x 1728 pixels and image Resolution up to 3264 x 2448 pixels .It has been modified into an infra-red camera with a long-pass interferometric filter, such that it allows only near-infrared light. The infra-red camera is connected to the laptop via USB 2.0 which provides power required for driving the device. Choice of the camera is based on the appropriate spectral response of the NIR light, compactness, the communication protocol of video transfer and the cost. Figure 1 shows the i-ball infra-red camera embedded with NIR LED’s of 880nm wavelength and Figure 2 shows the entire setup of our vein imaging system where the IR camera is connected to the laptop via USB 2.0.

Figure 1.

i-ball Infra-red camera

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Figure 2.

Vein detection system set up

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Methodology

The IR camera is connected to the laptop via USB 2.0 and a video of vein images is acquired. Open source computer vision (OpenCV) platform which is a useful tool for real- time applications has been used to implement a program in C language for processing the acquired video of veins. The algorithm is elaborated as given below.

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