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Can microplastics be visualised with MRI?
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Scientists tested whether MRI scans, a common medical imaging tool, can spot microplastics in the body. In lab experiments, clumps of microplastics showed up as small dark spots on a specific type of MRI scan, meaning doctors might one day track plastic buildup in tissues without invasive tests. This is early stage work, but it opens the door to studying how microplastics affect our health over time.
PURPOSE: Nanoplastics and microplastics (NMPs) are increasingly detected in human tissues. Currently, NMP tissue concentrations can only be detected using post-mortem, destructive techniques, severely limiting research into possible effects on the human body. Whether NMPs are MR-visible, and what implications NMPs have for medical imaging, remains unknown. METHOD: The impact of NMPs on MR imaging was investigated by utilising a phantom containing several concentrations of NMPs, suspended in agar solution, as well as a phantom containing 3D-printed plastic (PETG) plastic flakes, similarly suspended in agar. RESULTS: While NMPs were not apparent on clinical T and T weighted scans, NMP aggregates were observed on magnetic susceptibility (T weighted) scans, appearing as hypointensities. Susceptibility-weighted imaging and computational modelling show that NMP aggregates create localised magnetic field inhomogeneities, acting as magnetic susceptibility dipoles and appearing as millimetre-sized hypointensities on T images. CONCLUSIONS: NMP aggregates are detectable on T MR imaging and may potentially complicate the clinical interpretation of MR images.
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MRI-based microplastic tracking in vivo and targeted toxicity analysis
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Researchers developed a new MRI-based method to track microplastics inside living mice over 21 days. They found that the liver was the primary organ where polystyrene microplastics accumulated, and this accumulation led to liver cell death, inflammation, and changes in enzyme levels. This tracking technique could help scientists better understand how microplastics move through and affect biological systems.
Covalently labeled fluorescence-MRI dual-modal polystyrene microspheres for imaging and analysis of microplastics in biological systems.
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Scientists have created a new type of tiny plastic particle that glows under fluorescent light and shows up on MRI scans, allowing researchers to track exactly where microplastics travel in the body. In tests with zebrafish and mice, these specially labeled particles stayed stable and trackable without leaking harmful dye or metal, giving scientists a reliable new tool to study how microplastics move through living tissue and what health risks they might pose. This isn't a finding about microplastics' dangers directly—it's a new tracking method that will help future research answer that question more precisely.
Visualizing micro-nanoplastics in the human brain: Early evidence for roles in microvascular pathology
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Scientists found tiny plastic particles clinging to blood vessel walls in human brain tissue, using chemical tests and special imaging that makes plastics glow under laser light. These particles were found near unusual deposits in brain tissue, suggesting plastics may build up in blood vessels there. It's still unknown if this causes harm, but the finding raises new questions about how microplastics might affect brain health.
White mater hyperintensities and microplastics
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Using post-mortem MRI aligned with antemortem scans and pyrolysis GC/MS, researchers found large amounts of plastics in brain regions corresponding to white matter hyperintensities (WMH) and identified the cellular location of plastic particles using novel optical imaging. The findings suggest a potential link between microplastic accumulation in the brain and MRI-detectable white matter abnormalities.
Circulating Microplastics in Acute Ischemic Stroke: Feasibility, Variability, and Exploratory Comparisons with Healthy Individuals
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Scientists found tiny plastic particles (microplastics) in the blood of almost everyone tested, and stroke patients showed higher levels than healthy people in one comparison — though the difference wasn't clear-cut when comparing groups tested the same way. This is an early, small study, so it doesn't prove microplastics cause strokes, but it does show blood testing for plastics is possible and worth studying further to understand if these particles affect heart and brain health.
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