Chronic constipation and chronic diarrhea can also cause an anal fissure by repeatedly straining the lining of the anus. In the vast majority of cases, an underlying cause is chronic tension in a muscular ring - called the internal anal sphincter - that surrounds the anal canal. ...
But this isn't just any magnet -- we're dealing with an incredibly strong system here, one capable of producing a large, stable magnetic field. The strength of a magnet in an MRI system is rated using a unit of measure known as a tesla. Another unit of measure commonly used with ...
These new methods and technologies have greatly improved the efficiency and accuracy of the diagnosis made by the doctors. MRI or Magnetic Resonance Imaging is one such modern technology that is used for diagnosis. The MRI uses strong magnetic and radio waves to produce clear and accurate images ...
Magnetic resonance imaging (MRI) is an imaging technique used in radiology that uses strong magnetic fields, magnetic field gradients and radio waves to generate images of the organs in the body. Shutterstock/Gorodenkoff Every time you use a computer, you're using magnets. If your home has ...
Strong leg muscles help protect your knee and prevent strain. The following may also prevent a knee sprain:Slowly start your exercise or training program. Slowly increase the time, distance, and intensity of your exercise. Sudden increases in training may cause another knee sprain. Wear protective...
There are three smaller magnets within an MRI machine called gradient magnets. These magnets are much smaller than the primary magnet (about 1/1000 as strong), but they allow the magnetic field to be altered very precisely.It is these gradient magnets that allow image "slices" of the body ...
煤是一种重要的燃料，在点燃条件下燃烧，放出大量的热。煤在燃烧过程中能量的变化示意图是[ ]
Figure 3. A sagittal MRI sequence is shown, which shows significant neural activity in the right anterior cingulate cortex (BA 24), left anterior cingulate cortex (BA 24), and left medial frontal gyrus (BA 10). VACC activation is generally associated with affective processing, while its dors...
Cetyltrimethylammonium bromide (CTAB) is a class of aliphatic quaternary ammonium compounds which have a strong antimicrobial activity [215,216]. Study by Sands [216] showed a virucidal potency of CTAB against several bacteriophages (PM2, φ6, T4, PR4). The 3-log reduction of 106 PFU/mL ...
We're learning more about the craving that fuels self-defeating habits—and how new discoveries can help us kick the habit.