Archive 23.09.2021

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Understanding human-robot interaction critical in design of rehabilitation systems

Robotic body-weight support (BWS) devices can play a key role in helping people with neurological disorders to improve their walking. The team that developed the advanced body-weight support device RYSEN in 2018 has since gained more fundamental insight in BWS but also concludes that improvement in this field is necessary. They find that recommendations for the optimal therapy settings have to be customized to each device and that developers should be more aware of the interaction between patient and the device. The researchers have published the results of their evaluation in Science Robotics on Wednesday September 22.

Social robots may be more persuasive if they project less authority

In the future, socially interactive robots could help seniors age in place or assist residents of long-term care facilities with their activities of daily living. But will people actually accept advice or instructions from a robot? A new study from University of Toronto Engineering suggests that the answer hinges on how that robot behaves.

Watch these tube-shaped robots roll up stairs, carry carts, and race one another

Researchers have designed a 4D-printed soft robot that self-assembles when heated and can take on challenging tasks like rolling uphill and navigating a bumpy and unpredictable landscape. The prototype, which is tube-shaped, appears September 22nd in the journal Matter.

An autonomous system that can reach charge mobile robots without interrupting their missions

Researchers at Skolkovo Institute of Science and Technology in Russia have recently developed MobileCharger, an autonomous robotic system designed to charge other robots as they complete their missions. This system, presented in a paper pre-published on arXiv, can transfer energy to mobile robots without forcing them to fly back to designated charging stations when their power is depleted.

Surgeons to reach prostate with robot

Prostate cancer is the most common form of cancer in men. Every year about 13,000 Dutch men are diagnosed with this disease. According to the Prostate Cancer Foundation, about 1 in 10 men suffers from prostate cancer at some point in their lives.

When an all-male TU Delft student team started working with PhD researcher Martijn de Vries to design a robot that can precisely place a radiation source in your body with a steerable needle, it took a while for these statistics to sink in. But once that happened, motivation shot up.

TU Delft bachelor student Pepijn van Kampen, mechanical engineering, collaborated with fellow students Rolf Bavelaar, Niels Dee, Tetsuo Martynowicz and PhD supervisor Martijn de Vries to improve the current medical procedure for treating prostate cancer.
The steerable needle tries to overcome the limited effectiveness of current straight needles, which are hampered by obstacles and limited reach in area of the body that holds the prostate.

Pepijn van Kampen, mechanical engineering student and minor robotics graduate, says: “The first six months we spent on researching literature. Then we began to actually build our robot. And we started to wonder: are we going to see this robot again when we are 60 years old?”

Current Brachy therapy uses straight needles to reach the prostate and place radioactive material close to a tumor. This method is not always accurate, which may damage healthy tissue and can result in less intense treatment of the tumor. It also leads to additional attempts to get it right, which additional harm to the body.
The steerable needle deploys robotic assistance to, potentially, improve precision and control.

For a tumor located in the prostate, serveral treatments are availabe: surgery to remove the prostate, internal radiation therapy — also called brachytherapy or seed implantation – and external radiotherapy, which uses a machine outside the body to direct radiation beams at the cancer.

Brachytherapy places seeds, ribbons, or capsules that contain a radiation source near the tumor. It delivers a high dose of radiation directly to the tumor and helps spare nearby tissues. The treatment is most frequently applied to the prostate. It is also used to treat cancers of the head and neck, breast, cervix and eye.

Brachytherapy is put in place through a catheter, which is a small stretchy tube. Current treatment of prostate cancer uses a straight, inflexible needle. This method is not always accurate. “The flexible needle designed by Martijn de Vries has four segments, enabling the surgeon to steer the tip in a range of directions,” says Pepijn van Kampen, of the Steerable Needle Project. “Our robotic system aims to enhance and augment its steering precision, like with power steering in a car. And this works, in principle. Needle buckling is still a challenge. ”

The Steerable Needle Project has received high ratings. The student team graduated cum laude from their bachelor programme. For less needle buckling and more control, they recommend some form of feedback loop in combination with high end visualisation like Magnetic Resonance Imaging (MRI). Accurate robotic control may also depend on predictive models to guide the interaction between needle and patient tissue. Because that is also how a surgeon’s hand-eye coordination works: our human body makes predictions that enable us to intervene in the world with agility and speed, apparently without the cumbersome calculations and feedback loops that most robots still rely on.

Intrigued? Follow Martijn de Vries, and his fellow collaborators to see where this project heads next.

The post Surgeons to reach prostate with robot appeared first on RoboHouse.

A robot vision system that diminishes occlusions using mirror reflections

To navigate their surroundings safely and most effectively, robots should be supported by a highly performing computer vision system. One of the greatest challenges when developing computer vision systems for robots is to limit occlusions so that the robot can sense most of its surroundings.

The Latest Evolution of High-Performance Laser-Guided Vehicles Streamlines Pallet Movement in Deep-Freeze Warehouses

Technology advances in automated deep-freeze distribution have provided advantages for increased throughput, system uptime and a better ROI. Laser-guided vehicles, playing a pivotal role in this sub-zero technological evolution, have recently taken a quantum leap forward.

Researchers developing fully autonomous robot chef

Imagine having your own digital personal chef; ready to cook up whatever you want; able to tailor the shape, texture, and flavor just for you; and it's all at the push of a button. Columbia engineers have been working on doing just that, using lasers for cooking and 3D printing technology for assembling foods.
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