Cardiac MRI, is a medical imaging technology for the non-invasive assessment of the function and structure of the cardiovascular system. It is derived from and based on the same basic principles as magnetic resonance imaging (MRI) but with optimization for use in the cardiovascular system. These optimizations are principally in the use of ECG gating and rapid imaging techniques or sequences. By combining a variety of such techniques into protocols, key functional and morphological features of the cardiovascular system can be assessed.
MRI Scan of the Brain
Magnetic resonance imaging (MRI) techniques provide an extremely detailed, 3-D view of a living brain. The technique is critical for identifying abnormalities such as tumors, spotting the warning signs of some brain diseases, and revealing the extent of trauma from strokes.
Source: National Geographic
Magnetic resonance imaging (MRI) of the brain is a safe and painless procedure that uses a magnetic field and radio waves to produce detailed images of the brain and the brain stem. An MRI differs from a CAT scan (also called a CT scan or a computed axial tomography scan) because it does not use radiation.
An MRI scanner consists of a large doughnut-shaped magnet that often has a tunnel in the center. Patients are placed on a table that slides into the tunnel. (Some centers have open MRI machines that have larger openings and are helpful for patients with claustrophobia).
During the exam, radio waves manipulate the magnetic position of the atoms of the body, which are picked up by a powerful antenna and sent to a computer. The computer performs millions of calculations, resulting in clear, cross-sectional black and white images of the body. These images can be converted into three-dimensional (3-D) pictures of the scanned area. This helps pinpoint problems in the brain and the brain stem when the scan focuses on those areas. In some cases, MRI can provide clear images of parts of the brain that can’t be seen as well with an X-ray, CAT scan, or ultrasound, making it particularly valuable for diagnosing problems with the pituitary gland and brain stem.
MRI can detect a variety of conditions of the brain such as cysts, tumors, bleeding, swelling, developmental and structural abnormalities, infections, inflammatory conditions, or problems with the blood vessels. It can determine if a shunt is working and detect damage to the brain caused by an injury or a stroke.
Speech production (English) visualized by Real-time MRI
Magnetic resonance imaging (MRI) is a noninvasive medical test that helps physicians diagnose and treat medical conditions. MRI of the knee provides detailed images of structures within the knee joint, including bones, cartilage, tendons, ligaments, muscles and blood vessels, from many angles.
The examination is typically performed to diagnose or evaluate knee pain, swelling or bleeding in the tissues in and around the joint, damaged cartilage, damaged meniscus, damaged ligaments or tendons, sports-related knee injuries,bone fractures that may not be visible on x-rays and other imaging test, degenerative joint disorders such as arthritis,build-up of fluid in the knee joint, infections (such as osteomyelitis), tumors (primary tumors and metastases) involving bones and joints, or decreased motion of the knee joint.
The Human Heart
There is a growing tendency for MR images to be viewed in combination with PET and/or CT in the quest for more accurate — and therefore more useful — diagnoses of complex diseases. While hybrid PET/MR machines have yet to reach the market, a new open-source software application offers radiologists a way to create three-way PET/CT/MR image fusion. Radiologists normally rely on external markers when attempting to match clinical PET and MR images. However, the fuzziness of standard PET scans and the difficulty of coregistering images created by different machines at different times often complicate the process.
But Swiss researchers have developed an inexpensive and user-friendly image registration capability based on the free-to-download OsiriX software platform, and they presented their application at the 2008 European Congress of Radiology (ECR) in Vienna.
This What Your Brain Looks Like When You’re Freestyling
A recent study conducted by researchers at the National Institute on Deafness and Other Communication Disorders (NIDCD) sheds a light on what goes on inside of someone’s brain while partaking in “spontaneous lyrical improvisation.” The scanned image (shown left) compares the results of an A/B test during which subjects were instructed to freestyle (first row) and recite well-rehearsed verses (second row) to an identical 8-bar background track. For the full-length report, read “Neural Correlates of Lyrical Improvisation: An fMRI Study of Freestyle Rap.”
A Japanese company called Fasotec will convert an MRI scan of your unborn child into a 3D-printed replica
Unborn twins caught on video MRI for the first time
They might share the same DNA and cramped living space, but as these images reveal, life is anything but identical for unborn twins. This unprecedented glimpse into their inner world is afforded through a recently developed form of magnetic resonance imaging (MRI), which is being turned on twins for the first time. (Read more)
Real-time MRI of a human heart