Oncology & Cancer

Novel MRI-guided ultrasound treatment destroys prostate cancer

A novel MRI-guided procedure that uses therapeutic ultrasound effectively treats prostate cancer with minimal side effects, according to a new study presented today at the annual meeting of the Radiological Society of North ...

Radiology & Imaging

Does MRI screening benefit women with extremely dense breasts?

(HealthDay)—Health experts already know that women with extremely dense breasts don't get the same benefit from mammography as women without very dense breast tissue. But what hasn't been clear is if MRI screening might ...

Neuroscience

7T MRI offers new insights into multiple sclerosis

Increased immune system activity along the surface of the brain, or meningeal inflammation, may be important for understanding how multiple sclerosis (MS) progresses from the most common and earliest form of the disease known ...

Arthritis & Rheumatism

Ultrasound to guide treatment strategy not beneficial in early RA

According to new research findings presented this week at the 2019 ACR/ARP Annual Meeting, a treatment strategy guided by ultrasound information use does not appear to provide better treatment decisions in patients with early ...

Radiology & Imaging

Improved biopsies with MRI-compatible ultrasound system

Biopsies are standard procedures in interventional radiology, not least for patients with a suspected tumor. In this instance, magnetic resonance imaging (MRI) is increasingly the method of choice for guiding minimally invasive ...

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Magnetic resonance imaging

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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