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Radiation in MRI's and CT scans

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Brittany McCastle

on 7 June 2011

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Transcript of Radiation in MRI's and CT scans

Is radiation in MRI's and CT scans? Brittany McCastle MRI (magnetic resonance imaging) is a fairly new technique that has been used since the beginning of the 1980s. What is an MRI? The MRI scan uses magnetic and radio waves, which means that there is no exposure to X-rays or any other damaging forms of radiation. With an MRI scan, it is possible to take pictures from almost every angle, whereas a CT scan only shows pictures horizontally There is no ionizing radiation (X-rays) involved in producing an MRI scan. Since radiation is not used, the procedure can be repeated without problems CT (Cat) Scans? An abdominal CT scan was 20 times more radiation than a mammogram, which was 20 times more radiation than a chest X-ray. CT scans are made every year in the UK, but their widespread use is also a cause for concern -- the high doses of X-ray radiation used during the tests are suspected of causing cancers. the risk of CT scan causing cancer is 10 in 100 or 1 in 1,000 !D:! M R I ( C A T ) S c a n Build up pictures to look at the body NO side effects May cause cancer the ability to change the contrast of the images ability to change the imaging plane without moving the patient more widely available, faster, much less expensive may be less likely to require the person to be sedated or anesthetized. Contrast agents for MRI are those which have paramagnetic properties. One example is gadolinium. may be enhanced by use of contrast agents containing elements of a higher atomic number than the surrounding flesh (iodine, barium). very good for imaging bone structures. •The time taken for total testing is shorter than taken by MRI cost up to $4,000. costs $1,200 to $3,200 Referances: http://www.thenakedscientists.com/forum/index.php?topic=8971
http://www.listen-up.org/med/ct_mri.htm http://www.youtube.com/results?search_query=CT+machine&aq=f http://www.youtube.com/results?search_query=How+a+MRI+works&aq=f !!Test Questions!! 1.Which one of these two Scans does not have radiation?
A. MRI Scan
B. CT (Cat) Scan 2. AN MRI Uses _____ in their Machines.
A. Hydrogen atoms
B. Radiation
C. CT scans 3. True or False?
The CT (cat) Scan procedure is when the patient lays on a bed and has their entire body entered in the machine. 4. An MRI costs ____ to/than a CT (Cat) scan.
A. Less
B. Equal
C. More 5. True or False?
The CT (Cat) Scan can give cancer to 10 in every 100 patient. !Anwsers! 1. A
2. A
3. False
4. C
5. True
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