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Medical-grade image from an open-source ultrasound dev kit side project

The Murgen open-source ultrasound imaging dev-kit

What is this ?

Getting a home-made open-source ultrasound machine (dev-kit) up and running in your garage / hackerspace / fablab for less than 500$ (want the bolts and nuts of the murgen-based prototype ? Read a more completeReadMeMore.md and in general themurgen repo ).

For a full overview of the adventure, visit our Hackaday page =)

Getting the rough rough first image

We’ve got our first ultrasound image with the murgen board =) Not a baby, mind you, but at least an echo coming from a part of a fantom (condom filled with agar gel and tapioca balls) in front of the transducer. And we haven’t tapped into the full capabilities of the board yet, so it can be improved! Enclosed, the picture of the same fantom, using a commercial, 100k$ ultrasound machine.

Medical-grade image from an open-source ultrasound dev kit side project

Setting up a prototype

Disclaimers

Disclaimer #1: though an engineer, this project is the first of its sort, we never did something related. Bear with us, and the discovery process – we’re happy to learn on the way =)

Disclaimer #2: ultrasound raises questions. In case you build a scanner, use caution and good sense!

How-to start

Time to get some shopping done !

  • Get a murgen dev-kit: 140€ in electronics + PCB. Or 100€ with the components to put on a breadboard =)
  • Get a BitScope: 150€
  • Get a transducer : 110€ for brand new adaptaed ones, ~100€ for one found on ebay and hacking it
  • Get a Trinket Pro / Arduino : 10€
  • Get some small electronics (breadboard, cables et al) : 20€
  • Misc (Pizza, Beer, and a donation to Murgen): 15€

Total spent : 400€ to 450€

Find your way in the folders

murgen-dev-kit/             main repo |-- hardware                hardware information on electronics and mecanics |-- software                code to acquire, process and store ultrasound data `-- worklogs                logs froms the lab: our path to a working ultrasound device 
  • You will find the CHANGES.TXT, CONTRIB.TXT and LICENSE.TXT at the root.
  • Schematics are in the hardware/Altium/Schematics/PDF folder
  • Gerbers in in the hardware/Gerbers folder of course
  • Code for the acquisition using bitscope (at first 😉 ) is in software/ .

Setup

Connections

  • Connect the BitScope Chan A to Trinket Pin 11, and Chan B to Tests Points2 and 3.
  • Connect the trinket pins 12 and 13 to a 5-to-3V convertor (or double invertor), then to the board USPP and USPN pins.
  • Bring power to the board (GND, 5V, 3.3V) – the board uses ~150mA at 5V, so you can use a breadboard alim (see IMG_2413 below).

Hardware setup presentation

Medical-grade image from an open-source ultrasound dev kit side project

Software User’s Quick-Start Guide

Just Install the following:

  • BitScope BitLib
  • python math tools
  • Install something to code arduino – ArduinoIDE ?
  • Clone themurgen repo

You’re good to go !

Learn more : the lab log

  • Session 1 : Powering the board, power use, first (bad) trigging and echoes (06 March 2016)
  • Session 2 : Non-controlled pulsing, inverters, better echoes (11 March 2016)
  • Session 3 : Getting controlled pulsing, but width not controlled (15 March 2016)
  • Session 4 : Width of the pulses is getting controlled =) (19 March 2016)
  • Session 4b : Simple data visualisation with BitScope (19 March 2016)
  • Session 5 : moving the transducer to get the first image (20 March 2016)
  • Session 6 : Getting a clinically usable image (28 March 2016)
  • Session 7 : Getting cleaner images – code improvements (3 April 2016)
  • A more complete hardware ReadMe : Information, and more, with a focus on the electronic part of the project
  • A more complete software ReadMe : Information, and more, with a focus on the code part of the project (arduino, python, and such)

FAQ

What do I find here?

A full official dev release, including:

  • Terms of reference for the project
  • Bibliography
  • Detailed designed
  • Source file for the electronic board
  • Source for the Arduino controlling the board
  • Source for acquisition, processing and storage of the images
  • A full laboratory log

Typical Application

Playing with a broken transducer in a haribo sweet box to see if you can hack ultrasound scanners.

Software / Firmware Summary

Up to v1.0, we’re still playing with the board, so there’s not interface with the BBB.

However, there’s a series of tools to play with the board, one of which being the bitscope, a bit more handy than the redpitaya that the main echopen project uses, and though it is less precise, we do have less issues (trigging, memory, …) with it.

What is the timeline?

The murgen investigation had started in September 2015, but following a meetup at echopen’s HQ in Paris end of November, it had been activated again. The objective was to get a first functional prototype by February 2015, but this deadline was then fixed to March 24th, 2016, on which date murgen will be presented.

Read more about echopen.

Some recent articles :

Team

Acknowledgement

  • Thanks to Murgen, Sofian, Amit, Emmanuel, Florent, Bertrand & PHH, Mike in a way, list goes on !
  • Thanks to Jerome, Farad, Vincent obviously
  • Thanks to echOpen for the environment, wifi and coffee =)

Stay connected

License

The Murgen project and its prototypes are open hardware, and working with open-hardware components.

Licensed under TAPR Open Hardware License ( www.tapr.org/OHL )

Copyright Murgen and Kelu124 ( murgen@echopen.org , luc@echopen.org / kelu124@gmail.com ) 2015-2016

Source

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