To determine an object’s quantum properties, you may only need to measure how it exchanges heat with its environment, without touching the object itself

Olivier Grunewald took this image of the Icelandic volcano's central crater filled with lava, forming a fiery lake of liquid rock

Some 550 years ago, a Venetian monk named Fra Mauro set out to create a world map. Rather than myth and religion, it was based on solid evidence for the first time

Eurasian reed warblers don’t just get a sense of direction from Earth’s magnetic field – they can also calculate their coordinates on a mental map

Title: What Can Be Diagnosed From a Sleep Study?
Category: Diseases and Conditions
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Title: Magnesium Sulfate Reduces Threat of Cerebral Palsy
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Title: Missed Diagnoses in ICU Often Have Deadly Results: Review
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Title: Discovery May Improve Diagnosis of Alzheimer's, Parkinson's
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Pulmonary hypertension (PH) is highly prevalent in patients with interstitial lung disease (ILD) and is associated with increased morbidity and mortality. Widely available noninvasive screening tools are warranted to identify patients at risk for PH, especially severe PH, that could be managed at expert centres. This review summarises current evidence on noninvasive diagnostic modalities and prediction models for the timely detection of PH in patients with ILD. It critically evaluates these approaches and discusses future perspectives in the field. A comprehensive literature search was carried out in PubMed and Scopus, identifying 39 articles that fulfilled inclusion criteria. There is currently no single noninvasive test capable of accurately detecting and diagnosing PH in ILD patients. Estimated right ventricular pressure (RVSP) on Doppler echocardiography remains the single most predictive factor of PH, with other indirect echocardiographic markers increasing its diagnostic accuracy. However, RVSP can be difficult to estimate in patients due to suboptimal views from extensive lung disease. The majority of existing composite scores, including variables obtained from chest computed tomography, pulmonary function tests and cardiopulmonary exercise tests, were derived from retrospective studies, whilst lacking validation in external cohorts. Only two available scores, one based on a stepwise echocardiographic approach and the other on functional parameters, predicted the presence of PH with sufficient accuracy and used a validation cohort. Although several methodological limitations prohibit their generalisability, their use may help physicians to detect PH earlier. Further research on the potential of artificial intelligence may guide a more tailored approach, for timely PH diagnosis.

The rising obesity epidemic is a phenomenon that has gained increasing attention from health providers and health policy makers. This led to recognition of nonalcoholic fatty liver disease (MASLD). The standard for its assessment has been histologic, which is neither practical nor acceptable by patients. Subsequently, a number of noninvasive assessment methods have been developed. However, despite ease of implementation, their confounding variables do hinder their accuracy. Nonetheless, the development of the liver stiffness measurement (LSM) and incorporation of other biological parameters has minimized but not eliminated the need for liver biopsy. Imaging methods are useful in evaluation, estimation, and following the progression of steatosis and fibrosis with particular attention to controlled attenuation parameter (CAP) and MRI–Proton Density Fat Fraction (MRI-PDFF). The choices for the family physician are broad and rely on tests’ availability, cost, and patient acceptance. Great efforts have been undertaken to produce more robust and novel noninvasive markers that indicate fibrinogenesis directly in an implementable and cost-effective way.

BACKGROUND AND PURPOSE:

Low-field 64 mT portable brain MRI has recently shown diagnostic promise for MS. This study aimed to evaluate the utility of portable MRI (pMRI) in assessing dissemination in space (DIS) in patients presenting with optic neuritis and determine whether deploying pMRI in the MS clinic can shorten the time from symptom onset to MRI.

Dihydropyrimidinase (DHP) deficiency is an autosomal recessive metabolic disorder caused by biallelic pathogenic variants of DPYS. Patients with DHP deficiency exhibit a broad spectrum of phenotypes, ranging from severe neurological and gastrointestinal involvement to cases with no apparent symptoms. The biochemical diagnosis of DHP deficiency is based on the detection of a significant amount of dihydropyrimidines in urine, plasma, and cerebrospinal fluid samples. Molecular genetic testing, specifically the identification of biallelic pathogenic variants in DPYS, has proven instrumental in confirming the diagnosis and facilitating family studies. This case study documents the diagnostic journey of an 18-yr-old patient with DHP deficiency, highlighting features at the severe end of the clinical spectrum. Notably, our patient exhibited previously unreported skeletal features that positively responded to bisphosphonate treatment, contributing valuable insights to the clinical characterization of DHP deficiency. Additionally, a novel DPYS variant was identified and confirmed pathogenicity through metabolic testing, further expanding the variant spectrum of the gene. Our case emphasizes the importance of a comprehensive diagnostic approach using genetic sequencing and metabolic testing for accurate diagnosis.

Alveolar capillary dysplasia (ACD) is a fatal disorder that typically presents in the neonatal period with refractory hypoxemia and pulmonary hypertension. Lung biopsy is traditionally required to establish the diagnosis. We report a 22-mo-old male who presented with anemia, severe pulmonary hypertension, and right heart failure. He had a complicated hospital course resulting in cardiac arrest and requirement for extracorporeal membrane oxygenation. Computed tomography of the chest showed a heterogenous pattern of interlobular septal thickening and pulmonary edema. The etiology of his condition was unknown, lung biopsy was contraindicated because of his medical fragility, and discussions were held to move to palliative care. Rapid whole-genome sequencing (rWGS) was performed. In 2 d it resulted, revealing a novel FOXF1 gene pathogenic variant that led to the presumptive diagnosis of atypical ACD. Cases of atypical ACD have been reported with survival in patients using medical therapy or lung transplantation. Based on the rWGS diagnosis and more favorable potential of atypical ACD, aggressive medical treatment was pursued. The patient was discharged home after 67 d in the hospital; he is currently doing well more than 30 mo after his initial presentation with only one subsequent hospitalization and no requirement for lung transplantation. Our case reveals the potential for use of rWGS in a critically ill child in which the diagnosis is unknown. rWGS and other advanced genetic tests can guide clinical management and expand our understanding of atypical ACD and other conditions.

Pilocytic astrocytomas are the most common pediatric brain tumors, typically presenting as low-grade neoplasms. We report two cases of pilocytic astrocytoma with atypical tumor progression. Case 1 involves a 12-yr-old boy with an unresectable suprasellar tumor, negative for BRAF rearrangement but harboring a BRAF p.V600E mutation. He experienced tumor size reduction and stable disease following dabrafenib treatment. Case 2 describes a 6-yr-old boy with a thalamic tumor that underwent multiple resections, with no actionable driver detected using targeted next-generation sequencing. Whole-genome and RNA-seq analysis identified an internal tandem duplication in FGFR1 and RAS pathway activation. Future management options include FGFR1 inhibitors. These cases demonstrate the importance of escalating molecular diagnostics for pediatric brain cancer, advocating for early reflexing to integrative whole-genome sequencing and transcriptomic profiling when targeted panels are uninformative. Identifying molecular drivers can significantly impact treatment decisions and improve patient outcomes.

"A lot of puzzle games can leave you staring at the same static screen for ages, but here, I’m always pushing you forward," says Mark Brown of Game Maker’s Toolkit. For a decade now, Brown has been releasing accessible deep dives on game design for his popular YouTube channel, like "How Game Designers Protect Players From Themselves" and "The Two Types of Random in Game Design." This week, he’s releasing his own for the first time.

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A coronal mass ejection could strike the Earth's magnetosphere this week and cause a geomagnetic storm due to conditions caused by the autumnal equinox.

The sun blasted a coronal mass at Earth earlier this week, and after back-to-back major hurricanes, some are concerned it could impact the power grid.

A new test spots Lyme disease faster than the existing go-to approach and, if approved, could reduce the risk of complications

Levels of certain cells, fatty molecules and proteins in the blood are different in people with chronic fatigue syndrome than in those without it, which could help doctors spot the condition sooner

ALS, the most common form of motor neuron disease, can take a long time to diagnose, but a blood test could help doctors spot the condition sooner

A chemical produced by gut bacteria could be the basis for a non-invasive test for endometriosis – and mouse experiments suggest it might also help treat the condition

Cases of prostate cancer are surging alarmingly around the world. Thankfully, we are developing more accurate tests that can catch the condition early

1. Magnus Carlsen returns to Kolkata after almost five years at Tata Steel India Rapid and Blitz 2024  ChessBase India
2. "It's Chaotic": Chess World No. 1 Magnus Carlsen Reveals Why He Does Not Play In India  NDTV Sports
3. King Carlsen hails growth of Indian chess, praises Praggnanandhaa's fighting spirit  Telegraph India
4. Tata Steel Chess set for a Carlsen-Pragg opening  Hindustan Times
5. Tata Steel Chess India Rapid & Blitz 2024: Schedule, Venue, Players, Tickets, Prize Money  Firstpost

Hello gentle readers, and welcome to the SwitchArcade Round-Up for August 23rd, 2024. It’s the end of another week, and …

Continue reading "SwitchArcade Round-Up: ‘Thermonuclear’, ‘Magnus Trilogy’, Plus Today’s Other New Releases and Sales"

Niantic and Capcom just detailed the next major update coming to Monster Hunter Now (Free). Monster Hunter Now Season 3 …

Continue reading "‘Monster Hunter Now’ Season 3 To Add Magnamalo, Heavy Bowgun Weapon, Cooking, and More on September 11th"

The radio host criticized Jenner, a transgender woman, for supporting Donald Trump

After weeks of hurricanes and blackouts have left many in Cuba reeling, an earthquake has left people shaken as rumbling was felt across the eastern stretch of the island, including in bigger cities like Santiago de Cuba, as well as Holguin and Guantanamo.

Grâce à la production impressionnante de Cole Caufield, de Nick Suzuki et de Juraj Slafkovsky!

J’ai beaucoup de mal à comprendre ce qu’il y a d’étonnant dans le fait que le Canadien soit dernier au classement.

Researchers at Rice University have developed a magnetoelectric material that converts a magnetic field into an electric field. The material can be formulated such that it can be injected into the body, near a neuron, and then an alternating magnetic field can be applied to the area from outside the body. Magnetic fields are very […]

Researchers at the National University of Singapore have developed a magneto-responsive hydrogel wound dressing that also contains two different regenerative cell types. The hydrogel is also embedded with magnetic particles that can be stimulated using an external magnetic field. The action of the magnetic field on the gel-encapsulated particles causes mechanical stresses within the gel […]

Magnetic resonance imaging (MRI) has revolutionized healthcare by providing radiation-free, non-invasive 3-D medical images. However, MRI scanners often consume 25 kilowatts or more to power magnets producing magnetic fields up to 1.5 tesla. These requirements typically limits scanners’ use to specialized centers and departments in hospitals.

A University of Hong Kong team has now unveiled a low-power, highly simplified, full-body MRI device. With the help of artificial intelligence, the new scanner only requires a compact 0.05 T magnet and can run off a standard wall power outlet, requiring only 1,800 watts during operation. The researchers say their new AI-enabled machine can produce clear, detailed images on par with those from high-power MRI scanners currently used in clinics, and may one day help greatly improve access to MRI worldwide.

To generate images, MRI applies a magnetic field to align the poles of the body’s protons in the same direction. An MRI scanner then probes the body with radio waves, knocking the protons askew. When the radio waves turn off, the protons return to their original alignment, transmitting radio signals as they do so. MRI scanners receive these signals, converting them into images.

More than 150 million MRI scans are conducted worldwide annually, according to the Organization for Economic Cooperation and Development. However, despite five decades of development, clinical MRI procedures remain out of reach for more than two-thirds of the world’s population, especially in low- and middle-income countries. For instance, whereas the United States has 40 scanners per million inhabitants, in 2016 there were only 84 MRI units serving West Africa’s population of more than 370 million.

This disparity largely stems from the high costs and specialized settings required for standard MRI scanners. They use powerful superconducting magnets that require a lot of space, power, and specialized infrastructure. They also need rooms shielded from radio interference, further adding to hardware costs, restricting their mobility, and hampering their availability in other medical settings.

Scientists around the globe have already been exploring low-cost MRI scanners that operate at ultra-low-field (ULF) strengths of less than 0.1 T. These devices may consume much less power and prove potentially portable enough for bedside use. Indeed, as the Hong Kong team notes, MRI development initially focused on low fields of about 0.05 T, until the introduction of the first whole-body 1.5 T superconducting scanner by General Electric in 1983.

The new MRI scanner (top left) is smaller than conventional scanners, and does away with bulky RF shielding and superconducting magnetics. The new scanner’s imaging resolution is on par with conventional scanners (bottom).Ed X. Wu/The University of Hong Kong

Current ULF MRI scanners often rely on AI to help reconstruct images from what signals they gather using relatively weak magnetic fields. However, until now, these devices were limited to solely imaging the brain, extremities, or single organs, Udunna Anazodo, an assistant professor of neurology and neurosurgery at McGill University in Montreal who did not take part in the work, notes in a review of the new study.

The Hong Kong team have now developed a whole-body ULF MRI scanner in which patients are placed between two permanent neodymium ferrite boron magnet plates—one above the body and the other below. Although these permanent magnets are far weaker than superconductive magnets, they are low-cost, readily available, and don’t require liquid helium or to be cooled to superconducting temperatures. In addition, the amount of energy ULF MRI scanners deposit into the body is roughly one-thousandth that from conventional scanners, making heat generation during imaging much less of a concern, Anazodo notes in her review. ULF MRI is also much quieter than regular MRI, which may help with pediatric scanning, she adds.

The new machine consists of two units, each roughly the size of a hospital gurney. One unit houses the MRI device, while the other supports the patient’s body as it slides into the scanner.

To account for radio interference from both the outside environment and the ULF MRI’s own electronics, the scientists deployed 10 small sensor coils around the scanner and inside the electronics cabinet to help the machine detect potentially disruptive radio signals. They also employed deep learning AI methods to help reconstruct images even in the presence of strong noise. They say this eliminates the need for shielding against radio waves, making the new device far more portable than conventional MRI.

In tests on 30 healthy volunteers, the device captured detailed images of the brain, spine, abdomen, heart, lung, and extremities. Scanning each of these targets took eight minutes or less for image resolutions of roughly 2 by 2 by 8 cubic millimeters. In Anazodo’s review, she notes the new machine produced image qualities comparable to those of conventional MRI scanners.

“It’s the beginning of a multidisciplinary endeavor to advance an entirely new class of simple, patient-centric and computing-powered point-of-care diagnostic imaging device,” says Ed Wu, a professor and chair of biomedical engineering at the University of Hong Kong.

The researchers used standard off-the-shelf electronics. All in all, they estimate hardware costs at about US $22,000. (According to imaging equipment company Block Imaging in Holt, Michigan, entry-level MRI scanners start at $225,000, and advanced premium machines can cost $500,000 or more.)

The prototype scanner’s magnet assembly is relatively heavy, weighing about 1,300 kilograms. (This is still lightweight compared to a typical clinical MRI scanner, which can weigh up to 17 tons, according to New York University’s Langone Health center.) The scientists note that optimizing the hardware could reduce the magnet assembly’s weight to about 600 kilograms, which would make the entire scanner mobile.

The researchers note their new device is not meant to replace conventional high-magnetic-field MRI. For instance, a 2023 study notes that next-generation MRI scanners using powerful 7 T magnets could yield a resolution of just 0.35 millimeters. Instead, ULF MRI can complement existing MRI by going to places that can’t host standard MRI devices, such as intensive care units and community clinics.

In an email, Anazodo adds this new Hong Kong work is just one of a number of exciting ULF MRI scanners under development. For instance, she notes that Gordon Sarty at the University of Saskatchewan and his colleagues are developing that device that is potentially even lighter, cheaper and more portable than the Hong Kong machine, which they are researching for use in whole-body imaging on the International Space Station.

Wu and his colleagues detailed their findings online 10 May in the journal Science.

This article appears in the July 2024 print issue as “Compact MRI Ditches Superconducting Magnets.”

Faulty diagnostic tests can compromise both patient care and the nation’s response to infectious diseases—as made all too clear earlier this month when the Food and Drug Administration issued a safety alert about a COVID-19 test that carries a high risk of false negative results.

HONG KONG — China's National Health Commission (NHC) published its first set of guidelines to standardise the diagnosis and treatment of obesity, with more than half of China's adults already overweight and obese, and the rate expected to keep rising.  The guidelines, made public on October 17, come as China experiences an upward morbidity trend of its overweight and obese population. The rate of overweight or obese people could reach 65.3 per cent by 2030, the NHC said.   "Obesity has become a major public health issue in China, ranking as the sixth leading risk factor for death and disability in the country," the guidelines said. China is facing a twin challenge that feeds its weight problem: In a modernising economy underpinned by technological innovation, more jobs have become static or desk-bound, while a prolonged slowdown in growth is forcing people to adopt cheaper, unhealthy diets.

VolitionRx�s Nucleosomics� diagnostic platform detects epigenetic changes to fragments of chromosomes, called nucleosomes, that circulate in the blood of cancer patients. Credit: VolitionRx.

some are born great, some have greatness thrust upon them. once in a while a magnificent bastard comes along and changes the whole damn game.

TikTok’s “sleepy girl mocktails” remind us how important magnesium is for sleep and health

Enjoy the flavors of lasagne without all the layering and prep work. This easy, plant-based lasagna soup combines noodles, tomatoes, mushrooms, white beans, and zucchini, so it’s a complete one-pot meal. Make it in about an hour!  When I started noticing lasagna soup recipes a couple of years ago, I thought, “Hmm, that’s interesting.” But...

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