Arduino-Sonography: Arduino-Based Ultrasound Machine

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Inspired by a more complex and expensive project, Instructables member stoppi71 decided to create his own body-ultrasound machine using a 5 MHz ultrasound transducer via a paint-thickness gauge.

My hobby and passion is to realize physics projects. One of my last work is about ultrasonic sonography. As always I tried to make it as simple as possible with parts you can get on ebay or aliexpress. So let’s take a look how far I can go with my simple items…

Sonography is a very important way in medicine to look inside the body. The principle is simple: A transmitter sends ultra-sonic-pulses. They spread out in the body, are being reflected by inner organs or bones and come back to the receiver.

In my case I use the gauge GM100 for measuring the thickness of paint layers. Though not really intended for looking inside the body i am able to see my bones.

An Arduino Due provides computing power to turn sound pulses into images, while a 3.5-inch TFT display shows what it’s examining. Short pulses in the 100-200 nanosecond range are generated with the help of a monoflop and MOSFET, returning an echo corresponding to what it’s looking at.

Required components include:

• a gauge to measure the thickness of paint for 40 USD
• or just the 5 MHz transducer for 33 USD
• an arduino Due for 12 USD
• a 320×480 pixel display for 11 USD
• two 9V/1A power supplies for the symmetric +9/GND/-9V supply
• ultrasound-gel for sonography

for the transmitter:

• a step-up-converter for the needed 100V for 5 USD
• a common step-up-converter supplying 12-15V for the 100V-boost-converter for 2 USD
• a LM7805 voltage regulator
• monoflop-IC 74121
• mosfet-driver ICL7667
• IRL620 mosfet
• capacitors with 1nF (1x), 50pF (1x), 0.1µF (1x electrolytic), 47µF (1x electrolytic), 20 µF (1 x electrolytic for 200V), 100 nF (2x MKP for 200V
• resistors with 3kOhm (0.25W), 10kOhm (0.25W) and 50Ohm (1W)
• 10 kOhm potentiometer
• 2 pcs. C5-sockets: 7 USD C5 socket

for the receiver:

• 3 pcs. AD811 operational amplifie
• 1 pcs. LM7171 operational amplifie
• 5 x 1 nF capacitor, 8 x 100nF capacitor
• 4 x 10 kOhm potentiometer
• 1 x 100 kOhm potentiometer
• 0.25W resistors with 68 Ohm, 330 Ohm (2 pcs.), 820 Ohm, 470 Ohm, 1.5 kOhm, 1 kOhm, 100 Ohm
• 1N4148 diodes (2 pcs.)
• 3.3V zener diode (1 pcs.)

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