Monday, July 22, 2024

Revolutionizing Medical Imaging With Portable Butterfly iQ Ultrasound Probe

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About two-thirds of the world’s population lacks access to medical imaging, whether in developing nations or communities living in underdeveloped nations. Built on a chip, Butterfly Network has been providing solutions to the above said problem. This is through its
specifically designed 3D ultrasound imaging system on a chip (SoC)

Diagnostic ultrasound, also called sonography or diagnostic medical sonography, is an imaging method that uses sound waves to produce images of organs within your body. The images can provide valuable information for diagnosing and directing treatment for a variety of diseases and conditions.

Working of Ultrasound-on-Chip in a portable ultrasonic scanner for Medical Imaging
Working of Ultrasound-on-Chip in a portable ultrasonic scanner (Image Source)

Most ultrasound scannings are done outside the body but some are done by placing a small probe inside the body. Traditional ultrasound scanning devices used by radiologists work via piezoelectric crystals. Here an oscillating crystal produces sound waves that generate an image. At present, such scanning probes cost $8,000 while the traditional ultrasound unit itself costs $100,000 or more.

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Nowadays there is much discussion about Butterfly Network and its iQ ultrasound probe. This probe is a nano, handy, and point-of-care ultrasound probe in a saturated ultrasound scanning market. The Butterfly Network has found a way to generate these sound waves with semiconductor chips.

There are massive efficiencies associated with the semiconductor fabrication process, which have already made the iQ probe the cheapest device on the market and cost just $1,999. More importantly, however, the semiconductor approach means the iQ probe will follow Moore’s Law and will become massively cheap and better with time. This semiconductor approach also gives the iQ probe a massive acoustic bandwidth, a critical detail that makes it uniquely portable.

The narrow bandwidth of traditional ultrasound means that a variety of probes are needed. For example, one probe for the deep structures of the abdomen and another for the superficial thyroid gland. You thus have to transport a large device and/or multiple probes around the hospital.

Jonathan Rothberg, an entrepreneur in the biomedical industry, is behind the development of the Butterfly iQ probe. This iQ probe is FDA-approved for 13 different applications with a single probe, which is the maximum ever for a single ultrasound device.

Just one high-bandwidth tool can scan the abdomen, the blood vessels, the thyroid gland, and various other systems, in addition to guiding medical procedures. Doing it all with a single probe is hugely beneficial for physicians and reduces scanning space. Although this portability might sound like mere convenience, its mass production in the future might replace the stethoscope.

Lighting: 1.25 meters USB-C: 2 metrev
ItemProbe Specification
Probe dimension85×56×35mm
Probe weight313 grams
PowerBattery (rechargeable)
Battery life2 hours for continuous scanning
Min/Max scan depth1cm min / 30cm max
Ultrasound chipIntegrated CMOS chip
Transducer9000-element CMUT
Frequency range1-10MHz
Cable lengthLighting: 1.25 metres USB-C: 2 metrev

A study showed that first-year medical students using ultrasound can diagnose cardiac abnormalities better than expert cardiologists using stethoscopes. There are many other use cases where ultrasound scanning is more powerful than the clinical exam, for example, from detecting an aneurysm to rapidly diagnosing fluid in the abdomen.

Similarly, using ultrasound to visualize a blood vessel when placing a catheter has shown significant benefits relative to doing it blindly, which is the present clinical standard in some cases. With time, this technology might allow the patients to do their own ultrasound scanning. Butterfly Network is making an early start in this regard.

Table 2: Piezoelectric Crystal Based Ultrasound Scanning Vs Chip Based Ultrasound Scanning
Piezoelectric Based Ultrasound ScanningPiezoelectric-based crystal produces ultrasound
For each application, a separate probe is requiredChip produces ultrasound
Costs around $8,000Butterfly network probe iQ costs $1,999
(at release)
For each application a separate probe is requiredAll applications can be done with a single probe
Needs more storage spaceNeeds less storage space
Domestic scanning is not possibleDomestic scanning is possible
Image clarity is highImage clarity is less
More reliableLess reliable

Butterfly iQ probe works with Apple and Android devices using the Butterfly iQ app. Butterfly iQ probe specifications are given in Table 1 above.

In conclusion, just like a domestic blood sugar tester, it can make home scanning possible. It can reduce scanning costs to a great extent and make medical imaging technology easy and available everywhere. It can revolutionize medical imaging in hospitals and clinics. It can change the game in global health and soon become a consumer product that will be as easily available as the household thermometer.

The author, Vinayak Ramachandra Adkoli, is BE in industrial production and has served as a lecturer in three different polytechnics for ten years. He is also a freelance writer and cartoonist


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