The MRI scanner looks like a tube which is surrounded by a giant circular magnet. A moveable bed is present on which the patient is made to lie down and this table then passes into the magnet. A strong magnetic field is produced by the magnet that brings the protons of hydrogen atoms in...
The MRI is basically a tube-shaped magnet. While you're inside the machine, protons from water in your body get pulled into the magnetic field around you and start to line up. The machine also sends out radio waves that cause these protons to spin. When the waves are turned off, the ...
MRI scan vs. CT Both tests let a doctor see inside your body to diagnose a condition or how you're responding to a treatment. Both procedures require you to lie on a table and go inside a circular scanner while a technician goes into another room to take the images. But the tests hav...
The human body is mostly water. Water molecules (H2O) contain hydrogen nuclei (protons), which become aligned in a magnetic field. An MRI scanner applies a very strong magnetic field (about 0.2 to 3 teslas, or roughly a thousand times the strength of a typical fridge magnet), which aligns...
1. C 2. A 3. B 4. C 【原文】 W: Welcome to this week’s edition of Understanding Science. With me is Stephen Bayley, an expert in medicine. Professor Bayley, can you tell us something about the MRI scanner? M: Well, like an X-ray machine, but normal X-ray machines can only...
What is the medical definition of MRI? An MRI is similar to acomputerized tomography(CT) scanner in that it produces cross-sectional images of the body. Looking at images of the body in cross section can be compared to looking at the inside of a loaf of bread by slicing it. Unlike aCT...
Archeologists might use a 3D scanner to archive information gathered from ancient artifacts. The imaging devices commonly used by health care professionals, known as computed tomography (CT) and magnetic resonance imaging (MRI), are also types of 3D scanning technology. In these instances, the devic...
The CT scanner looks like a big donut and it has a narrow table present in its center. During MRI scan, the patient is placed inside the tunnel of the scanner and can feel claustrophobic; whereas in CT scan, the patient rarely feels claustrophobic due to the openness of the doughnut shape...
What Beatboxing Looks Like Through an MRI ScannerAngela Watercutter
(fMRI). An MRI scanner uses magnetic fields and radio waves to track the changes in oxygenated blood that accompany mental activity. Until recently, MRI scanners needed several minutes of activity and so could not be used to track rapid thought processes such as comprehending a joke. New ...