More than 60 million magnetic resonance imaging (MRI) scans are performed worldwide each year, but imaging for the millions of patients with cardiac implantable electronic devices (CIEDs) such as pacemakers is a logistical ...
May 04, 2022
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The body is like a sophisticated network with a myriad of peripheral blood vessels connected from the heart to the extremities. If blood fails to pass through these peripheral blood vessels, a wound may not heal or even lead ...
Apr 29, 2022
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Alzheimer's disease is the main cause of dementia worldwide. Although there is no cure, early detection is considered crucial for being able to develop effective treatments that act before its progress is irreversible.
Apr 27, 2022
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Myocarditis (inflammation of the heart muscle) is usually caused by viruses, e.g., COVID-19. However, it can also be induced by medication, toxic substances or in the context of a rheumatological disease. Clinical assessment ...
Mar 24, 2022
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Researchers from HSE University have shown how the brain works differently depending on whether a subject is dealing with common (shared) or private natural resources. The ventral striatum—the so-called pleasure center—plays ...
Mar 18, 2022
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A new study from Keck Medicine of USC finds that the incidence rate of metastatic prostate cancer has significantly increased for men 45 and older and coincides with recommendations against routine prostate cancer screenings.
Mar 14, 2022
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A new way of treating arrhythmias, including atrial fibrillation (AF)—the most common heart arrhythmia diagnosis in clinical practice—has debuted at UC San Diego Health. vMap is a non-invasive, computational mapping system ...
Feb 14, 2022
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The spleen is the biggest lymphatic organ in the body and its major roles are to create blood (hematopoiesis), to store blood, to filter the blood and to generate immunological responses. Radiological examination of the changes ...
Feb 04, 2022
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Modeling the heart in 3D using combined imaging techniques can help predict heart rhythm abnormalities, or arrhythmias, in patients with a genetic heart disease, shows a study published today in eLife.
Jan 25, 2022
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Researchers at the University of Sussex are one step further to developing a blood test capable of diagnosing the most aggressive form of brain tumor.
Jan 17, 2022
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Magnetic Resonance Imaging (MRI), or nuclear magnetic resonance imaging (NMRI), is primarily a medical imaging technique most commonly used in radiology to visualize the internal structure and function of the body. MRI provides much greater contrast between the different soft tissues of the body than computed tomography (CT) does, making it especially useful in neurological (brain), musculoskeletal, cardiovascular, and oncological (cancer) imaging. Unlike CT, it uses no ionizing radiation, but uses a powerful magnetic field to align the nuclear magnetization of (usually) hydrogen atoms in water in the body. Radio frequency (RF) fields are used to systematically alter the alignment of this magnetization, causing the hydrogen nuclei to produce a rotating magnetic field detectable by the scanner. This signal can be manipulated by additional magnetic fields to build up enough information to construct an image of the body.:36
Magnetic Resonance Imaging is a relatively new technology. The first MR image was published in 1973 and the first cross-sectional image of a living mouse was published in January 1974. The first studies performed on humans were published in 1977. By comparison, the first human X-ray image was taken in 1895.
Magnetic Resonance Imaging was developed from knowledge gained in the study of nuclear magnetic resonance. In its early years the technique was referred to as nuclear magnetic resonance imaging (NMRI). However, as the word nuclear was associated in the public mind with ionizing radiation exposure it is generally now referred to simply as MRI. Scientists still use the term NMRI when discussing non-medical devices operating on the same principles. The term Magnetic Resonance Tomography (MRT) is also sometimes used.
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