Rice University researchers unveil new model that could sharpen MRI scans

MRI innovation

New findings from a team of Rice University researchers could enhance MRI clarity. Photo via Unsplash.

Researchers at Rice University, in collaboration with Oak Ridge National Laboratory, have developed a new model that could lead to sharper imaging and safer diagnostics using magnetic resonance imaging, or MRI.

In a study recently published in The Journal of Chemical Physics, the team of researchers showed how they used the Fokker-Planck equation to better understand how water molecules respond to contrast agents in a process known as “relaxation.” Previous models only approximated how water molecules relaxed around contrasting agents. However, through this new model, known as the NMR eigenmodes framework, the research team has uncovered the “full physical equations” to explain the process.

“The concept is similar to how a musical chord consists of many notes,” Thiago Pinheiro, the study’s first author, a Rice doctoral graduate in chemical and biomolecular engineering and postdoctoral researcher in the chemical sciences division at Oak Ridge National Laboratory, said in a news release. “Previous models only captured one or two notes, while ours picks up the full harmony.”

According to Rice, the findings could lead to the development and application of new contrast agents for clearer MRIs in medicine and materials science. Beyond MRIs, the NMR relaxation method could also be applied to other areas like battery design and subsurface fluid flow.

“In the present paper, we developed a comprehensive theory to interpret those previous molecular dynamics simulations and experimental findings,” Dilipkumar Asthagiri, a senior computational biomedical scientist in the National Center for Computational Sciences at Oak Ridge National Laboratory, said in the release. ”The theory, however, is general and can be used to understand NMR relaxation in liquids broadly.”

The team has also made its code available as open source to encourage its adoption and further development by the broader scientific community.

“By better modeling the physics of nuclear magnetic resonance relaxation in liquids, we gain a tool that doesn’t just predict but also explains the phenomenon,” Walter Chapman, a professor of chemical and biomolecular engineering at Rice, added in the release. “That is crucial when lives and technologies depend on accurate scientific understanding.”

The study was backed by The Ken Kennedy Institute, Rice Creative Ventures Fund, Robert A. Welch Foundation and Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory.

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Researchers at the University of Houston are revolutionizing pulsed power systems and traditional MRI machines. Image via Pexels

Houston researchers are developing smaller scaled imaging machines

future of health tech

A team of researchers in Houston are developing the next generation of miniaturized pulsed power systems — a technology that was key to the creation of x-ray machines, then MRI machines, and more.

University of Houston researchers led by Harish Krishnamoorthy, Cullen College assistant professor of electrical and computer engineering, are working to develop the next generation of miniaturized pulsed power systems. X-rays, MRIs, and similar technology are deeply intertwined with the nuclear age and the mid-20th century. Additionally, pulsed power systems have been used to create other military weapons, such as radar systems and rail guns.

The research is was published in IEEE Transactions on Industrial Electronics. In the paper, the researchers propose creating a mini-pulsed power system that can shrink the system’s energy storage components, such as capacitors, and deliver an immediate surge of power, a recent UH news release summarizes. According to the paper, energy storage can be reduced to less than one-tenth the size of what conventional pulsed power systems use.

“We’re essentially creating a small high-density energy storage machine that will help with reducing the space these machines use, which will save hundreds of thousands of dollars in material costs and improve their reliability,” Krishnamoorthy says.

Recently, the U.S. Department of Energy’s Advanced Research Projects Agency-Energy (ARPA-E) awarded the research team a $1 million grant to build their gallium nitride (GaN)-based miniaturized pulsed power system. The team will be conducting the project alongside scientists from Harvard University and Schlumberger, who are sub-recipients of the grant.

“Initially we’ll make a compact pulsed power supply for extreme environment fluid characterization that can disruptively reduce the cost of downhole well logging tools used in fossil and geothermal energy production. This will be followed by a miniaturized converter suitable for mobile hand-held MRI machines. However, we think that we can extend our technology to make small water-purification systems, pulsed laser systems and pulsed electro-magnetic radiation sources,” says Krishnamoorthy.

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Houston space companies win NASA funding to build Mars exploration robots

mission to mars

Two Houston-area spacetech companies have landed a portion of a $17 million award from NASA to develop robots for exploring the surface of Mars, the agency announced this month.

Houston-based Inuitive Machines and Webster, Texas-based MEI Technologies, which does business as Aegis Aerospace, were among the seven companies selected to receive the funding from NASA's Science Transport and Robotic Innovation for Deployment and Exploration (STRIDE) initiative.

According to the release from NASA, the companies are tasked with creating "innovative mobility systems" that would allow future Mars missions to access more challenging terrain and difficult-to-reach regions of the planet, and to travel farther distances. NASA estimated that the work will begin this fall.

NASA solicited proposals for participants in the STRIDE initiative in January. The seven named companies are the first selected to participate in the program.

The additional five companies to receive STRIDE funding include:

"STRIDE demonstrates NASA’s commitment to strong public-private partnerships, allowing the agency to explore new approaches for Mars surface exploration while identifying key capability gaps and development needs for commercial systems that could operate and traverse realistic Martian environments," NASA shared in the announcement.

Last month, Intuitive Machines was awarded $148.3 million to deliver its Nova-C lander to the moon. The funding was part of $600 million the space agency awarded to three companies as part of its Moon Base Program and was Intuitive Machines' sixth task order under NASA's Commercial Lunar Payload Services (CLPS) program. Astrobotic was also one of the companies to land funding for the Moon Base program, as well as Austin-based Firefly Aerospace.

Around the same time, Firefly Aerospace was awarded a $13 million subcontract from NASA’s Jet Propulsion Laboratory to develop technology for NASA’s SkyFall mission to Mars. The mission aims to deploy three Mars helicopters to "perform science and demonstrate airborne subsurface mapping and resource prospecting on the planet." Read more here.

SpaceX launches Starship test flight with most advanced Starlinks to date

Out in Space

SpaceX’s mammoth Starship rocket blasted off Friday, July 24, on another test flight stretching halfway around the world, this time releasing 20 of the most advanced Starlinks.

Towering 407 feet, Starship soared from the company’s base at the southern tip of Texas. NASA monitored the space-skimming flight, a critical step toward using the Starship as a lunar lander for moon crews.

The hourlong journey ended with a splashdown so soft that the spacecraft remained afloat in the Indian Ocean as the SpaceX webcast drew to a close, drawing cheers from employees back at the launch site.

Elon Musk’s SpaceX had replaced six of the 33 engines on the first-stage booster after they failed to ignite earlier in July, resulting in a last-second launch abort. The previous Starship flight in May also experienced engine trouble, which prevented the booster from making a controlled return.

This time, all of the engines fired at liftoff, but not enough of them lit back up for the booster's return, causing it to descend too fast and slam into the Gulf of Mexico. The spacecraft continued soaring eastward, popping out the Starlinks one by one 124 miles up before reentering.

It was the 13th flight of the world’s biggest and most powerful rocket, and the second this year of the new version dubbed V3. Like the previous demo, neither the booster nor spacecraft was meant to be saved, instead plunging into the sea.

The stainless steel, retro-looking spacecraft hovered upright over the Indian Ocean before lowering into the water, more than 10,000 miles from where the flight began.

It was the best reentry yet, according to SpaceX, with the intact booster floating amid just a few flames. Previous flights ended with the spacecraft engulfed in flames and exploding at splashdown — or rupturing in midair.

“We're really pumped about this,” said SpaceX engineer Kate Tice, calling it “lucky flight 13.”

The Starlinks accomplished all their jobs before reentering over the Indian Ocean.

After being ejected from the Starship’s Pez-like dispenser, the Starlinks managed to communicate via lasers with older Starlink models already in orbit. With more than 10,000 Starlinks currently providing internet, SpaceX boasts the world’s largest satellite constellation.

Six of the newly launched Starlinks carried cameras that photographed Starship’s heat shield at flight's end, beaming back amazingly crisp shots even as the spacecraft bobbed in the ocean. The heat shield was also equipped with sensors to measure the extreme pressure placed on the spacecraft during launch. Most of the heat shield’s thermal tiles were black, but some were deliberately painted white to simulate missing tiles, part of an experiment to test the shield’s robustness.

"We got all the heat shield data we needed and then some!" Musk said on X.

NASA Administrator Jared Isaacman offered congratulations. “Excited for what will be learned from this mission,” Isaacman noted on X.

SpaceX wants to make sure Starship’s heat shield can withstand the heat of entry before trying to return it to the Starbase launch pad near the Texas-Mexico border. The company already has used a pair of giant mechanical arms at the pad to capture a Starship booster. The company plans to do the same with the actual spacecraft, which is designed to be totally reusable.

NASA needs Starship to wrap up testing and reach orbit soon so the Artemis III astronauts — three Americans and one Italian — can practice docking their capsule with it next year.

Starship is also the vehicle with which Musk intends to build a city on Mars. He's already booking tourist trips to Mars, as well as the moon.

The latest test flight was delayed first by the July 16 launch abort, then again July 23 by thick clouds from Tropical Storm Bertha.

University of Houston debuts UH Health, expanding collaborative health care and research efforts

health care hub

The University of Houston has announced its cross-disciplinary academic venture, UH Health.

It will align UH’s efforts in education, research and clinical partnerships to create new opportunities to advance research and innovation, community impact, and education, according to a news release.

“From opening the state’s first college of optometry to developing groundbreaking vaccines, improving the health of all Texans has been a UH priority for decades,” UH President Renu Khator said in the release. “Now, with the launch of UH Health, we are bringing together the full strength of our health enterprise to expand our reach, advance research and transform the future of health for our communities.”

UH is adopting a fully collaborative model, with health professionals from various concentrations to help better understand overall patient care, which includes factors like clinical, behavioral and social factors that can influence health outcomes.

UH Health will also have partnerships with HCA Healthcare, Memorial Hermann Hospital, Baylor College of Medicine, MD Anderson Cancer Center and other Texas Medical Center facilities. In addition, UH Health will work with DHR Health in the Rio Grande Valley to create new opportunities for health care education, workforce development and research in one of Texas' medically underserved regions.

As part of UH Health, UH Health Family Care Center will provide integrated primary care and mental health services to the University and its surrounding communities at affordable prices to serve the Third Ward, East End and South Houston. The Household-Centered Care program will give students opportunities to work directly with community caregivers through patient home visits, while the 3rd Ward Place of Wellness offers health screenings, preventive services, education and other resources designed to support long-term health and well-being, according to UH. The College of Optometry will continue to see children and families via outreach programs and clinics across the community.

UH Health also aims to address shortages in health care professionals, providing a pipeline from the university to the workforce. According to the Texas Hospital Association, 64 percent of hospitals in the state are operating with reduced services and fewer beds due to staff shortages.

“Preparing the next generation of health care leaders is one of the most important investments we can make in the future of our state,” Jonathan McCullers, vice president for health affairs at UH and dean of the Tilman J. Fertitta Family College of Medicine at UH, added in the release. “UH Health is ensuring our graduates are equipped to work effectively in today’s complex healthcare environment.”

Additionally, UH shared it is investing $77 million into a 55,000-square-foot medical research facility aimed at boosting interdisciplinary research and scientific discovery.

“Healthcare is no longer delivered in isolation, and complex health challenges require coordinated solutions,” McCullers added. “UH Health allows us to work across disciplines to tackle health challenges, advance research and improve outcomes for patients and our community.”

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