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Medical Imaging

Military

New method may lead to improved detection of nuclear materials

Scientists at Northwestern University, Illinois, have outlined a new method for detecting electromagnetic radiation at the high energy end of the spectrum. The work could lead to the development of a small, hand held device able to detect this "hard radiation" and has implications for the detection of radioactive materials which could potentially be employed in terrorist weapons, such as nuclear bombs or radiological dispersion devices, as well as materials employed in clandestine nuclear programs. Read More

Good Thinking

Cheap, portable microscope uses holograms instead of lenses

While financial contributions are certainly a great help to health care practitioners in developing nations, one of the things that they really need is rugged, portable, low-cost medical equipment that is compatible with an often-limited local infrastructure. Several such devices are currently under development, such as a battery-powered surgical lamp, a salad-spinner-based centrifuge, and a baby-warmer that utilizes wax. UCLA is now working on another appropriate technology in the form of a small, inexpensive microscope that uses holograms instead of lenses to image what can't be seen by the human eye.Read More

Science

Fluorescent nanotubes used for imaging of internal organs

Mice are frequently used as lab models when testing new drugs, and fluorescent dyes are sometimes injected into their bodies so that researchers can better see how those drugs are progressing through their systems. Unfortunately, the pictures obtained in this process start to become murky when imaging anything more than a few millimeters beneath the skin. Scientists from Stanford University have now devised a system that utilizes fluorescent carbon nanotubes to produce clear color images of organs that are located centimeters within a mouse's body.Read More

Health & Wellbeing

New brain imaging method sheds light on the nature of consciousness

Using a newly developed imaging technique, researchers in the U.K. have for the first time observed what happens to the brain as it loses consciousness. The method known as "functional electrical impedance tomography by evoked response" (fEITER) uses a 32 electrode array to scan the brain at a rate of 100 times a second and by applying this as an anaesthetic drug takes effect, researchers are able to build a real-time 3-D video that will aid in better understanding of how the brain functions and the nature of consciousness.Read More

Health & Wellbeing

Ultrasound said to offer better technique for measuring blood pressure

Not only is the old inflatable-cuff-around-the-arm an uncomfortable way of having one's blood pressure measured, but it turns out that it doesn't always provide enough information, either. If a physician wishes to check for vascular diseases such as atherosclerosis, thrombosis or aneurysms, for instance, they're going to want to know how the blood is flowing in areas besides the patient's arm. Because the cuff works by temporarily stopping the blood flow, however, it's not going to work too well on a patient's neck or torso. Fortunately, scientists from The Netherlands' Eindhoven University of Technology (TU/e) have discovered that ultrasound can be used instead, and that it provides more details. Read More

Medical

Medical tech company creates world's smallest video camera

Medigus has developed the world's smallest video camera at just 0.039-inches (0.99 mm) in diameter. The Israeli company's second-gen model (a 0.047-inch diameter camera was unveiled in 2009) has a dedicated 0.66x0.66 mm CMOS sensor that captures images at 45K resolution and no, it's not destined for use in tiny mobile phones or covert surveillance devices, instead the camera is designed for medical endoscopic procedures in hard to reach regions of the human anatomy.Read More

Medical

Wearable scanner opens new pathways in the study of brain function

U.S. scientists have developed a new miniature, wearable Positron Emission Tomography (PET) scanner which enables the simultaneous study of brain function and behavior in animals. PET scans are much like Computed Tomography (CT) scans and have helped uncover the molecular underpinnings of conditions like drug addiction, brain diseases such as dementia and they have been used in the medical imaging of cancers.Read More

Medical

Acoustic rectifier improves quality of ultrasound images

Sonography, or ultrasound imaging, is commonly used for diagnostic and therapeutic applications – the best-known example being photos and videos of developing fetuses that expectant parents excitedly wave around. Because ultrasound relies on sound waves being sent into the body and then reflected back to create the image, the interference creating by these waves meeting causes some degradation of image brightness and resolution. In order to enable stronger, sharper medical imaging, scientists at Nanjing University in China have developed an "acoustic rectifier" that forces sound waves to travel in only one direction.Read More

Medical

New medical imaging technique delivers streaming video at molecular level

Scientists and MDs have a wide range of technologies available for the imaging of live tissue, but each of these comes with its own limitations - be it poor contrast, low resolution, long response times or the viewing process damaging the tissue being observed. A team of Harvard researchers has developed a new type of optical biomedical imaging that promises to overcome these obstacles and is so fast and high-resolution that it can capture live video of cells and molecules.Read More

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