Change Seminar October 14 2010. Change Discussions One discussion topic each week Three presenters Each presenter discusses one project and prepares discussion.

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Presentation transcript:

Change Seminar October

Change Discussions One discussion topic each week Three presenters Each presenter discusses one project and prepares discussion questions Choose your own project or I can provide suggestions

Discussion Scheduling 10/28: Education – Presenters: 11/11: Microfinance – Presenters: 11/25: Communication – Presenters: 12/9: Health – Presenters:

Applications of imaging in ICTD October

Today’s discussion Cell Scope – Mobile microscopy for disease diagnosis (Berkeley) A system for non-contact, automated cardiac pulse measurements using video imaging and blind source separation (MIT) A system for automated spectroscopy using cell phone cameras (University of Illinois)

Discuss…

Discussion questions What are the ethical considerations of automated medical diagnosis? What level of accuracy is acceptable? Would it be feasible to use this technology in a low resource setting? What challenges would arise during a sustainable deployment of this technology? What about training? Who would use it?

Non-contact, automated cardiac pulse measurements Ming-Zher Poh, Daniel J. McDuff, and Rosalind W. Picard (MIT)

Manual measurement Checking a person’s vital signs — pulse, respiration and blood pressure — can be done manually or by attaching sensors to the body.

Main idea Develop a system that can measure these health indicators (pulse, respiration and blood pressure) automatically. Use a low-cost camera (such as a built-in webcam). e_SeLk&feature=related e_SeLk&feature=related

So far… The system can extract accurate pulse measurements from low-resolution webcam imagery. Measures slight variations in brightness produced by the flow of blood through blood vessels in the face.

So far… Produces pulse rates accurate to within about three beats per minute compared to approved manual monitoring devices. Works even when the subject is moving a bit in front of the camera. Can also get accurate pulse signals from three people in the camera’s view at the same time.

Next steps… Extend the capabilities to measure respiration and blood-oxygen levels. Eventually be able to monitor blood pressure as well.

Discuss…

In what situations would such a device be useful? Or dangerous? What new challenges would arise when using this technology in a low resource setting? What are the costs/benefits of this technology? What are the implications of self-diagnosis by patients?

Automated spectroscopy in the classroom Alexander Scheeline (University of Illinois)

Main idea Develop software that turns a camera phone, an LED, and a few other cheap tools into a spectrometer.

Applications One of the most widely used means for identifying and quantifying materials in both physical and biological sciences. By measuring the electromagnetic spectrum a substance absorbs or emits, you can determine its molecular composition. Measure the amount of protein in meat, or water in grain, or iron in blood, etc.

Set-up Equipment (excluding camera) costs < $3

Education “The potential is here to make analytical chemistry a subject for the masses rather than something that is only done by specialists.” “There’s no doubt that getting the cost of equipment down to the point where more people can afford them in the education system is a boon for everybody.” - Scheeline

Discuss…

How could this technology be applied to problems in ICTD? Who would use an instrument like this? What is likely to affect accuracy? How will accuracy affect potential applications?