« previous next »

Author Question: MRIs are more useful in certain areas than CT scans. Discuss these areas. What will be an ideal ... (Read 77 times)

frankwu

  • Hero Member
  • *****
  • Posts: 549
on: Jul 12, 2018
MRIs are more useful in certain areas than CT scans. Discuss these areas.
 
  What will be an ideal response?

Question 2

What is the general Body Mass Index formula that works with metric or English units?
 
  A) Wt2/ht2 B) Wt/ht2 C) (Wt/ht)2 D) Wt2/ht


lcapri7

  • Sr. Member
  • ****
  • Posts: 350
Reply #1 on: Jul 12, 2018
Answer to Question 1

Magnetic resonance imaging (MRI) can produce accurate and detailed pictures of the structures of the body and the brain, and it can distinguish between normal and abnormal tissue. MRI is more accurate than other imaging methods for detecting cancer that has spread to the bone, although positron emission tomography (PET)/computed tomography (CT) scans find cancer of the lungs more accurately. MRIs may be used for diagnosis and for the treatment of certain conditions that used to require surgery. For example, using MRI, radiologists can now clean or close off arteries without surgery. MRIs do not use radiation and are noninvasive. MRIs are used to image brain tumors and to help diagnose disorders of the nervous system, such as multiple sclerosis. MRIs also detect stroke at an earlier stage than other tests. MRIs can help find brain abnormalities in patients suffering from dementia. It is particularly useful with brain disorders because it can distinguish among different types of nerve tissue.
A new technique will attempt to use MRIs in combination with lasers to perform instant, bloodless, high-resolution biopsies. High-powered, pulsed lasers are focused on cells. This gives the cells the ability to glow. Computer software is then used to create a picture of the location of the beam and the fluorescence of the cells. Any change in the cell is seen. Because this technique cannot see far into the body, MRIs must be used for a complete picture.
For women at high risk for breast cancer, yearly MRIs and mammograms appear to save some lives. MRIs are not recommended for average women because of too many false positives. Breast tomosynthesis combines three-dimensional ultrasound and MRIs to create three-dimensional breast images. It can find tumors that are hidden

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Five Areas for listening to the heart Five Areas for listening to the heart
A chest X-ray showing pneumonia characterized by the patch of gray-white areas. A chest X-ray showing pneumonia characterized by the patch of gray-white areas.
Two areas of reduced cortical volume and one area of increased cortical volume observed in people ... Two areas of reduced cortical volume and one area of increased cortical volume observed in people ...
Three language areas of the cerebral cortex that have been the focus of studies on neuroanatomical ... Three language areas of the cerebral cortex that have been the focus of studies on neuroanatomical ...
Areas of the United States, Mexico, and Cuba will be affected by a rise of just 100 cm Areas of the United States, Mexico, and Cuba will be affected by a rise of just 100 cm
Video: Central Nervous System Animation

For a complete list of videos, visit our video library