Smartphone based portable low-cost continuous wave Doppler Ultrasound system

Students of Indian Institute of Technology Kharagpur, Biswabandhu Jana, Rakesh Biswas, Pallab Nath won the award for research work of Smartphone based portable low-cost continuous wave Doppler Ultrasound system. They carried their project work under guidance of  Prof. Swapna Banerjee, Dr. Goutam Saha. 

The Peripheral arterial disease is an important cause of morbidity and affected almost 202 million people worldwide in 2010. A high end medical diagnostic system in rural healthcare units is not available due to its high cost. So, an attempt has been made to design a portable, low cost, smartphone based, continuous wave Doppler Ultrasound System for common people. The designed Ultrasound system consists of three major blocks, viz., Analog Front End (AFE), Signal Processing Block (SPB), and User Interface Block (UIB). In AFE, a pencil probe of 8 MHz is positioned on the artery to receive the backscattered signal and a tuned RF amplifier followed by an envelope detector is used to extract the Doppler shifted signal. The de-modulated signal is digitized for sending to the SBP module. The SBP is a Microblaze soft core processor based embedded system where processing is performed in an FPGA. The UIB displays spectrogram in real time and transfers to mobile through Bluetooth. Next, a smartphone application has been developed for further analysis. Android application removes the noise from the spectrogram and extracts clinically important blood flow features. A machine learning algorithm has been implemented in the smartphone for identifying the normal and abnormal condition. UNIQUE FEATURES – Diagnosis of arterial diseases by assessing the inconsistent blood flow in the peripheral arteries. – Detection of the exact zone of aortic obstruction. – Determine the normal and abnormal condition in an automated way. – The blood flow image can be sent to the doctors. – Abnormalities in an arterial system can be diagnosed by changing only transducer probe. – Detect Korotkoff sound for blood pressure measurement.

Dr. Harsh Vardhan, Minister of Science and Technology, awarded the Gandhian Young Technological Innovation (GYTI) Appreciation to Biswabandhu Jana, Rakesh Biswas, Pallab Nath , Indian Institute of Technology Kharagpur at the GYTI 2018 Awards function held at Rashtrapati Bhawan on March 19, 2018.

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