Low-dose CT chest scans could help detect pneumonia in at-risk patients while exposing them to only small amounts of radiation, a new study has found. The research, published in Radiology: Cardiothoracic Imaging, shows that ultra-low-dose scans can effectively detect pneumonia in patients with compromised immune systems, enabling doctors to treat the infection before it becomes life-threatening. According to the researchers, these scans expose patients to just 2% of the radiation dose used in a standard CT scan.

"This study paves the way for safer, AI-driven imaging that reduces radiation exposure while preserving diagnostic accuracy,” lead researcher Dr Maximiliano Klug, a radiologist with the Sheba Medical Center in Ramat Gan, Israel, said in a news release. He added that CT scans are the gold standard for detecting pneumonia but there are concerns regarding the risk posed by repeated exposure to radiation. There is a solution- ultra-low-dose CT scan. However, the problem is that these scans can be grainy and hard to read, researchers said.

Study Gives Solution To This

To overcome that, Klug's team developed an AI program that could help "de-noise" low-dose scans, making them sharper and easier to read. Between September 2020 and December 2022, 54 patients with compromised immune systems who had fevers underwent a pair of chest CT scans -- a normal dose scan and an ultra-low-dose scan. The AI program cleaned up the low-dose scan, and then both sets of images were given to a pair of radiologists for assessment. Radiologists had 100% accuracy in detecting pneumonia and other lung problems with the AI-cleaned low-dose scans, but 91% to 98% accuracy in examining the scans that hadn’t been improved through AI, results show.

"This pilot study identified infection with a fraction of the radiation dose," Klug said. "This approach could drive larger studies and ultimately reshape clinical guidelines, making denoised ultra-low dose CT the new standard for young immunocompromised patients.

How Can You Detect Pneumonia?

Pneumonia is a lung infection that causes the air sacs in the lungs to fill with fluid or pus and can be caused by bacteria, viruses, or fungi. The symptoms can range from milk to severe, which includes:

Coughing with or without cough

Fever

Chills

Trouble breathing

Chest pain, especially when breathing deeply or coughing

Sweating or chills

Rapid heart rate

Loss of appetite

Bluish skin, lips, and nails

Confusion.

How to detect Pneumonia in coughing newborns and toddlers?

Pneumonia can severely affect newborns and young children as their lungs are comparatively more sensitive. As per Dr Goyal, young children can cough for various reasons including seasonal infections and tonsillitis, which is very common in this age group. But if they look visibly irritable and have poor sleep patterns, then parents must reach out to an expert. "I am not saying that parents must visit a hospital but any local paediatrician would be able to detect pneumonia in your kid.

Researchers have discovered that something as simple as weakened grip strength may be an early warning sign of psychosis—a complex mental condition marked by distorted thinking, delusions, and hallucinations. Published in the American Journal of Psychiatry, the study adds to a growing body of evidence that subtle changes in physical functioning, especially motor skills, may be deeply intertwined with brain health and psychiatric conditions.

The findings point to a potential paradigm shift in how clinicians may one day screen for psychosis—by using an everyday, easily measurable physical marker. As mental health professionals and researchers seek better ways to identify and treat psychosis before it fully develops, the humble handgrip test may soon become a vital tool in the psychiatric toolkit.

What is Psychosis?

Psychosis is a term that describes a range of symptoms where a person loses touch with reality. Classic signs include delusions (false beliefs) and hallucinations (seeing or hearing things that aren’t there). However, the journey into psychosis often begins long before these dramatic symptoms appear. Early warning signs can be subtle—changes in behavior, social withdrawal, trouble thinking clearly, or a decline in self-care.

Psychosis typically emerges in late adolescence or early adulthood, but it can affect people at any age. It’s a feature of several mental health disorders, including schizophrenia, bipolar disorder, and severe depression, and can also arise in older adults as a result of neurological conditions like Parkinson’s or Alzheimer’s disease.

The study involved 89 participants recently diagnosed with psychosis (within the past five years), compared with 51 individuals in good mental and physical health. Participants underwent grip strength tests, well-being assessments, and brain imaging scans.

Not only did those with psychosis show significantly lower grip strength, but this weakness was also tied to changes in the brain's default mode network—a complex system that becomes active during rest, daydreaming, or inward-focused thoughts. Researchers found that lower grip strength correlated with reduced connectivity in three key brain regions:

• The anterior cingulate cortex,
• The sensorimotor cortex, and
• The cerebellum.

All three play vital roles in motor function, cognition, and emotion. When connectivity among these regions decreased, so did physical grip strength and overall psychological well-being.

Why A Strong Grip Strength Important?

Grip strength has long been recognized as a general indicator of health. Lower grip strength is associated with higher mortality risk, reduced quality of life, and poorer day-to-day functioning. But its connection to mental health—and specifically to psychosis—is a new and important insight.

“Grip strength seems to capture that things are not going well, but it hasn’t been well studied in relation to brain function or early psychosis,” said Dr. Alexandra Moussa-Tooks, senior researcher and assistant professor of psychological and brain sciences at Indiana University.

The study’s findings suggest that changes in grip strength may reflect underlying disturbances in brain network function—what researchers call “resting-state functional connectivity.” In other words, the physical symptom of a weakening grip could be a visible sign of invisible changes happening in the brain.

While it may seem far-fetched to connect your ability to open a pickle jar with your mental stability, grip strength is increasingly being recognized as a proxy for overall health—both physical and cognitive. Past research has linked low grip strength to a higher risk of cardiovascular disease, frailty, depression, and even early mortality.

This new study takes it a step further by linking grip strength to resting-state functional connectivity in the brain—a measure of how different parts of the brain interact when a person is not actively doing a task. The less synchronized these connections, the more likely a person is to experience disturbances in thought, behavior, and even basic physical abilities.

Dr. Heather Burrell Ward, lead author and assistant professor of psychiatry at Vanderbilt University Medical Center, said the findings "identify potential brain targets for new treatments for psychosis," including the possibility of using magnetic brain stimulation or exercise to strengthen neural connections.

Symptoms of Psychosis

“If Psychosis Is a Fire, Symptoms Are the Smoke”

Traditionally, treatment for psychosis has focused on managing the “smoke”—the overt symptoms like delusions and hallucinations. But as Dr. Moussa-Tooks explains, “If psychosis is a house on fire, symptoms such as delusions and hallucinations are the smoke. In a fire you don’t target the smoke, you target the fire and its source. And yet, currently that’s not how we approach treatment for psychosis.”

Motor disturbances, such as reduced grip strength, may be among the earliest signs that something is amiss in the brain. Because these changes are more fundamental and easier to measure than complex cognitive symptoms, they could help clinicians identify and address psychosis at its source—potentially before full-blown symptoms develop.

What Causes Psychosis?

Psychosis is a complex condition with no single cause. It arises from a combination of genetic vulnerability, brain development differences, and environmental stressors or trauma. While it can be a symptom of mental illnesses like schizophrenia or bipolar disorder, it can also occur independently or as part of physical illnesses, particularly in older adults.

Recognizing early warning signs—whether behavioral, emotional, or physical—can make a crucial difference in outcomes. Early intervention is associated with better long-term recovery and improved quality of life.

Could a handgrip test become a new mental health screening tool? The researchers believe it's possible.

“Grip strength and other motor functions are easily assessed and more readily interpretable than complex tasks often used to study psychosis,” said Moussa-Tooks. “Our work shows that these simple metrics could have profound implications in early detection and treatment.”

Such early detection tools are especially critical, as earlier intervention in psychosis typically leads to better outcomes. The current model, which relies heavily on self-reported symptoms or behavioral changes, is reactive and often too late.

As science continues to uncover the deep connections between brain and body, one thing becomes increasingly clear—sometimes, holding on tightly might be the very first step to staying mentally well.

With rates of esophageal cancer having quadrupled since the 1970s and fewer than 20% of patients surviving five years post-diagnosis, early detection is more critical than ever. The capsule sponge test offers a powerful tool for risk stratification, ensuring that high-risk individuals continue receiving endoscopy while sparing low-risk patients from unnecessary invasive procedures.

The gold standard for monitoring patients at risk of esophageal (throat) cancer has been the endoscopy—a procedure that, while effective, is invasive, uncomfortable, and resource-intensive. Now, a simple device known as the “pill-on-a-string” or capsule sponge test is emerging as a transformative alternative, promising to make screening and surveillance for throat cancer faster, less invasive, and more accessible for millions worldwide.

The concept is ingeniously simple: patients swallow a small capsule attached to a string. Once in the stomach, the capsule dissolves, releasing a sponge that expands to about the size of a coin. Healthcare professionals then gently pull the sponge back up by the string, allowing it to collect cells from the lining of the esophagus as it travels upward. The entire procedure takes about ten minutes and can be performed by a nurse in a clinic or even a mobile screening van.

Barrett’s esophagus is a chronic condition in which prolonged acid reflux damages the lining of the esophagus. Over time, the damaged cells can become precancerous, forming dysplasia, and potentially progressing into esophageal adenocarcinoma—a type of throat cancer with notoriously poor survival rates. Despite the relatively low annual conversion rate from Barrett’s to cancer (approximately 0.5%), regular monitoring is essential.

Traditionally, endoscopy has been the go-to method for this surveillance. However, it is not without drawbacks: sedation, fasting, potential complications, and significant cost. This is where the pill-on-a-string method is poised to transform care—making monitoring more accessible, efficient, and patient-friendly.

What Is the Pill-on-a-String Test?

The new test involves swallowing a capsule containing a compressed sponge. Once it reaches the stomach, the capsule dissolves, allowing the sponge to expand. Attached to a string, the sponge is gently pulled back up through the esophagus, collecting cells from the lining along the way. These cells are then analyzed in a lab for red-flag changes indicative of dysplasia or early cancer.

Though the idea may initially sound uncomfortable, the experience has proven to be far more tolerable than an endoscopy. For Duncan Cook, a 57-year-old heating engineer from Cambridge, who has endured nearly two decades of endoscopic monitoring, the change was welcome.

“The first time I had the sponge, I was a bit nervous,” Cook shared in a news release. “It’s quite a big pill to swallow, but it’s much better than going for endoscopies... I was able to have the test done and go right back to work after.”

A major challenge is that symptoms often overlap with benign conditions like heartburn, leading to late diagnoses when treatment options are limited. Early detection is critical: when caught at stage 1, five-year survival rates can reach 63%. This is why regular surveillance of high-risk individuals—particularly those with Barrett’s esophagus—is so important.

In a large multi-center trial involving 910 patients across 13 hospitals in the U.K., researchers from the University of Cambridge and Queen Mary University of London evaluated the effectiveness of the capsule sponge test. Participants—all of whom were already being monitored for Barrett’s esophagus—underwent both the new test and a standard endoscopy for comparison. Findings from the study, recently published in The Lancet, are compelling:

• 54% of patients were classified as low-risk after the sponge test, showing no cellular changes that could indicate progression to cancer.
• Only 0.4% of the low-risk group were later found via endoscopy to have high-risk cell changes.
• No cancers were detected in those flagged as low-risk by the sponge test.

These results suggest that more than half of the patients undergoing routine endoscopies could safely switch to the capsule test without compromising diagnostic accuracy.

“Our findings suggest that the capsule sponge could help stratify patients with Barrett’s esophagus by risk,” said Dr. Peter Sasieni, director of the Cancer Research UK Cancer Prevention Trials Unit. “Given the low risk of progression in these individuals, it should be safe to replace their usual endoscopy with the capsule sponge.”

The research team isn’t stopping here. Scientists are now working to refine the sponge test further by enhancing laboratory analysis of the collected cell samples. Artificial intelligence (AI) is being evaluated to assist in identifying early signs of dysplasia, potentially boosting accuracy and reducing human error.

Professor Rebecca Fitzgerald, director of the Early Cancer Institute at Cambridge, noted, “We need an alternative surveillance method that’s less invasive, easier to administer and more reliable… Endoscopies aren’t always a reliable way of spotting early cancers, and they depend on the skill of the person doing it."

Food Standards Australia New Zealand is urging people to not consume two peanut butter products by Coles. These two varieties are Coles Smooth peanut butter and Coles Crunchy peanut butter, which have been found to contain mycotoxin and aflatoxin. Coles has also recalled these two products. The question is raised for products with the batch marked best before February 5, 2027.

Coles' recalling means that people can return these products for a full refund.

The toxins found in these products are said to increase the risk of liver cancer. An alert has been issued, which reads: “Coles Online customers can receive a refund or credit by contacting Coles Online Customer Care on 1800 455 400. Any consumers concerned about their health should seek medical advice.”

Also Read: Hepatitis B Nears Elimination In Uzbek Children After Years Of Immunization

What Are These Toxins, How Does It Impact Our Health?

Mycotoxins

As per the World Health Organization (WHO), mycotoxins are toxic substances produced naturally by certain types of mould (fungi). These moulds can grow on a wide variety of foods—such as grains, dried fruits, nuts, and spices—especially in warm, damp, and humid environments. The contamination can occur either before harvest or after, during storage or even on the food itself. Alarmingly, most mycotoxins are highly stable and can survive food processing methods.

There are hundreds of known mycotoxins, but a few pose significant health risks to both humans and animals. These include aflatoxins, ochratoxin A, patulin, fumonisins, zearalenone, and nivalenol/deoxynivalenol. Mycotoxins enter the food chain when crops are infected with mould. People can be exposed either by consuming contaminated food directly or indirectly—most commonly through animal products like milk, when livestock are fed mould-contaminated feed.

Where Are They Found?

Mycotoxins can contaminate food before harvest (in the field) or afterward during storage and processing. Since most mycotoxins are chemically stable, they can survive food manufacturing and cooking processes, making them hard to eliminate completely.

Mycotoxins can pose serious health risks to both humans and animals. Their effects can range from sudden poisoning to long-term health issues such as:

• Suppressed immune response
• Liver damage
• Increased cancer risk

Livestock can also be exposed through contaminated feed, and humans may indirectly consume these toxins through animal products like milk.

Also Read: 'Who Heals The Healer?' What Makes The National Doctors' Day 2025 Theme So Relevant?

Common Mycotoxins to Watch For

Though hundreds of mycotoxins have been identified, a few are especially harmful and frequently found in food:

• Aflatoxins (among the most toxic, produced by Aspergillus moulds found in soil and stored grains)
• Ochratoxin A
• Patulin
• Fumonisins
• Zearalenone
• Nivalenol/Deoxynivalenol (DON)

What Are Aflatoxins?

As per the National Cancer Institute, US, aflatoxins are a group of toxic compounds produced by specific types of fungi, primarily Aspergillus flavus and Aspergillus parasiticus. These fungi thrive in warm, humid climates and commonly infect crops like maize (corn), peanuts, cottonseed, and various tree nuts. Contamination can occur at multiple stages—while the crops are growing in the field, during harvest, or later in storage.

The National Cancer Institute also notes that exposure to aflatoxins is associated with an increased risk of liver cancer.

Another 2013 study published in World Journal of Gastroenterology notes that while Hepatocellular carcinoma (HCC) is one of the leading causes of cancer deaths worldwide, it is caused by aflatoxin. The study notes that aflatoxin is a food contaminant produced by the fungi Aspergillus flavus and Aspergillus parasiticus, is a known human carcinogen that has been shown to be a causative agent in the pathogenesis of HCC. In fact, Aflatoxin B1 has been classified by the WHO as a “group A” carcinogen because of it’s proven contribution to the pathogenesis of HCC.