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Ultrasound Could Protect Pacemakers From Hackers

You never want your wireless device open to attacks, but if that device is implanted inside your body, security becomes even more important. With pacemakers and other medical devices being controlled and monitored from afar, scientists say it's time to step up protection. Those concerns in mind, a group of researchers from the Swiss Federal Institute of Technology and the French National Institute for Research in Computer Science and Control have developed a new safety net.

According to Technology Review
, the system uses ultrasound waves to measure the distance between a medical device and the wireless reader trying to communicate with it. This could prevent potential hackers from wirelessly gaining access to private information stored on the device, draining its battery, or causing it to malfunction. With the ultrasound system, access to the device would be restricted to the physical proximity of the communicator. In the plan proposed by senior researcher Claude Castelluccia and his team, you'd need to go through a series of authentication steps and be within 10 meters of the device in order to gain access.

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Computers

GE Debuts Vscan, the 'Stethoscope of the 21st Century'

One of the medical profession's most iconic instruments is getting a serious upgrade. The "stethoscope of the 21st century" was unveiled yesterday at the Web 2.0 summit by General Electric CEO Jeff Immelt. The Vscan, which looks like the lovechild of a Motorola RAZR and an iPod, places the power of ultrasound into the palm of a doctor's hand, and is set to increase the ease and effectiveness of the routine check-up.

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Computers

Robot Doctors Join the Fight Against Breast Cancer


From Da Vinci robosurgeons to helpful nursebots , robots are becoming commonplace in hospitals the world over -- and now researchers at Duke University have developed a rudimentary tabletop robot that uses 3D ultrasound technology to detect a 'lesion' in a simulated sponge breast, pinpoint its exact location, and perform a biopsy. All the calculations are performed by the device itself, using what has been described as "a basic artificial intelligence program." The next step in the research will be an upgrade that will that the robotic arm from three-axis to six-axis capability, and a change from the old sponge-based simulated breast to one made from turkey breasts, which approximates the density of human breast tissue. According to Stephen Smith, director of the Duke University Ultrasound Transducer Group, if things stay on track, robots will be performing routine breast exams and biopsies in five to ten years. Video after the break.

[Via PhysOrg]

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Audio/Video

Military Invention Stops Bleeding with Sound


If we had our way, all our military tax dollars would go to DARPA. Whether it be nano planes, robot arms, or high-resolution sniper scopes, it always has something interesting cooking, and today's defense-minded gadget is no different. It's called a DBAC device, for Deep Bleeder Acoustic Coagulation; basically a portable ultrasound wrap that can identify wounds ("bleeders") and reduce their severity. It uses Doppler waves to find an internal leak, then turns up the frequency and amplitude on that location to stem it, all in a completely automated fashion able to be managed by any Joe in a hot zone. Okay, so perhaps it's not as cool as a remote-controlled zombie shark, but this cuff has the potential to save many lives and limbs on the battlefield -- assuming it works. DARPA hopes to have a functional prototype ready in 18 months. [Warning: PDF read link]

[Via CNET News]

Advice, Reviews, Holiday Gift Guide, Featured Stories

Give the Gift of Pearly White Teeth



Is the world's first ultrasound toothbrush all that? Read this to find out:

What it is: Ultreo claims the Ultrasound is the first major innovation in electric-toothbrush technology since Sonicare came out roughly 15 years ago. It uses -- appropriately enough -- ultrasound technology to clean your teeth (a super high-pitched form of sound pressure, and yes, that's the same technology used to check out the sex of your unborn baby).

Why it's different: The Ultreo uses roughly four million cycles of ultrasound energy to create bubbles that expand and contract -- this movement, combined with regular bristle-action, helps remove the tiny chunks of Swedish fish and/or meatballs that get stuck in those hidden spots between your teeth.

Where you can get it:
At the moment, Ultreo is available online from Ultreo's website -- it'll eventually make its way to retail stores and dentist's offices, making it kind of a rarefied gift for someone who loves their teeth.

Price: Ultreo will set you back $149.99, but snag a discount code from your dentist to save a few bucks.

What we like: Immediately after you finish brushing, a distinct feeling of (quite literal) squeaky-clean sets in; your teeth actually feel as if they've been buffed and polished, and the squeak when you rub your finger across them is actually audible (though not visible). The unit itself feels solid and well-built, and the brush-head seems seems more durable than those of other premium toothbrushes.

What we don't like:
Hard to find anything, other than the high price. While it's not necessarily a bad thing, per se, the Ultreo doesn't produce quite as much friction as other high-end electric toothbrushes. This may come as something of a shock to those used to, say, the Sonicare's full-on tooth-and-gum massage. The Ultreo's lighter touch is a result of cleaning being accomplished through ultrasound waves, which you don't actually feel.

Does it live up to the hype? While it will be tough to say how well the Ultreo actually works until our next dentist appointment, initial impressions are definitely positive. It feels like a great way to clean those pearlies, and the lack of friction is likely to be easy on the gums, for those who tend to otherwise brush too hard.

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Green Tech

Get Power from Your Own Blood?

Nanogenerator Wants Your Blood

Doctors have been stuffing electrical devices like artificial hearts and hearing aids into the bodies of patients for decades now, but there's always been a challenge: Power. These internal gadgets either rely on batteries that need replacement via surgery or get their power from external sources, resulting in unsightly wires or contacts protruding from the body (internal hearing aids are sometimes in the skin behind the ear, while older pacemakers have wires coming out out of the stomach or under the arm).

Now, some scientists at the Georgia Institute of Technology might have a solution: a tiny, tiny nanogenerator that can produce electricity just by being placed in your bodily fluids.

The devices generate power via ultrasonic waves, which are captured and turned into a small amount of current. The details of just how this works are somewhat scant at the moment, but we're guessing there aren't any turbines involved and that the amount of juice able to be extracted from your own juice won't enable you to give your car a jump start on a cold morning just by licking your fingers and touching the battery contacts. But, the hope here is that small devices patrolling your bloodstream or monitoring your vitals could provide their own power, potentially enabling them to work indefinitely -- well, until you dry out anyway.

From Engadget

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