How CT scan works?Can anyone give me a web page about it?
98368
CT (computed tomography), sometimes called CAT scan, uses special x-ray equipment to obtain image data from different angles around the body and then uses computer processing of the information to show a cross-section of body tissues and organs.\n\nCT imaging is particularly useful because it can show several types of tissue—lung, bone, soft tissue and blood vessels—with great clarity. Using specialized equipment and expertise to create and interpret CT scans of the body, radiologists can more easily diagnose problems such as cancers, cardiovascular disease, infectious disease, trauma and musculoskeletal disorders. \n\nGot to the web site below for more details.
620753
Yes-I had it done to look at spots on my lungs that were hard to see due to other things in the way. It sounds scarry and looks worst to see the hospital staff in protective coverings. Its not painful in any way. Not sure what bad effects it causes-never noticed anything its been over 4 years. Didn't help me in my case-still were not sure. The fluid might make you a little warm (nothing hard to deal with. ) You must lie quietly down for a while than they scan you (open scan-not bad) Scan takes awhile. No ill affects from it. I would advise you to drink lots of water and eat fruit afterwards so your body flushes it out-just to be safe. Again I could do everything when done that I could do when I went... I was tired just from waiting so long for everything but all in all just fine. On me had a follow up right after -just a xray check. Anything else you would like to know? I didn't change colors neither.
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There you go, and more...\n\nhttp://www.univsource.com/radiology.htm
491941
One thing to consider is that nowadays films are being used less and less. My last CT-scan didn't end up on film, just on a CD-ROM. I don't know if that's possible for X-ray, but I would think this is a shrinking market.
739483
I've heard of it. Lungs don't filter everything and it only takes a tiny clot or bit of one to damage a tiny blood vessel or more in the brain. So this would be a stroke-like happening, yes, damage to the brain.\nOlder CT machines only pick up larger damage, or else the damage might not be visible even to a better (Newer) one.
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because the ct scan can create 3 dimensional rotating images of structural components.  So if the person was say, laying face down, they would still have an image of the front side because the mechanism rotates taking in information from all perspectives and computers can then even generate that into a full 3 dimensional image. a good source is always wikipedia and heres a direct link to ct scans   \n\nhttp://en.wikipedia.org/wiki/Computed_axial_tomography
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its a bone scan A seratec scan uses the same tracer, technetium, as a traditional technetium bone scan, but instead of attaching it to calcium-like material to follow bone activity, the tracer is attached to white blood cells, the cells that help you fight off infection.  When injected back into the body, the labeled white blood cells migrate towards any infection that may be present.  If they accumulate in some location, this test may help  determine where an infection may be present.   This test is an excellent imaging test to assess for osteomyelitis (bone infection).
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A complete scan, depending on the organs studied, sequences performed, and need for contrast enhancement may take up to one hour or more. Newer scanners with more powerful magnets utilizing updated software and advanced sequences may complete the process in less time.
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The CT will only work on an AC circuit so I don't see where it would make any difference.  The only thing that would is to have another phase too close and the magnetic fields might cancel each other. Since the current being measured is AC the output from the CT will also be AC and shouldn't matter on the leads.
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You shouldn't get all worked up about it right now.  The Doctors are just looking for what is causing your headaches. There is no guarantee you will be diagnosed with either.  There is a lot of minor things that can cause your symptoms too. So try to stay calm!! I know that is easy for me to say, but no matter what happens you can get through it.  Don't worry about the CT scan either.  I'm studying to be a Rad Tech and the scan is really simple.
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It is a system of measurement used to characterize the relative density of a substance X-rayed. Helps radiologist distinguish between air, fat, water, soft tissues, bones etc. on CT scans for example.
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http://www.vistaradiology.com/NewFiles/MRI.html
769725
sounds like a herniated disc\nhave the MRI done\nit is more reliable than a cat scan\nby continuing to work in this condition you risk doing more and possibly permanent damage to your back
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http://www.ctinmateinfo.state.ct.us/\n\nThere ya go
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The attached site has questions and answers regarding radiation exposure.  All questions are answered by qualified medical personnel.  In a CT scan, the radiation dose is directed only to the part being imaged.  Radiation does not float around the room.  Your ovaries/testicles (you don't state if you are male or female) will receive little if any radiation during a CT scan of your head.  Here is an example of what I found:\n\n"Q: What are the radiation dose and exposure risks involved in a CT of the paranasal sinuses, i.e., a CT of the whole set of sinuses around the nose, with no more specifications given by the physician requesting the CT examination? Is it comparable to what is usually designated as a "skull CT" or a "head CT"?\n \nA: A CT of the sinuses is basically the same as a CT of the head. While the measured dose to the head is typically in the range of 2,000 to 5,000 millirem1 (mrem), this exposure would correspond to an equivalent dose2 of approximately 200 mrem for the entire body. A dose of 200 mrem is roughly equal to a year's worth of background radiation from continuous exposes to cosmic rays, radioactive materials present in the earth and building materials, and radioactive materials normally present within our own bodies from the food we eat. For a further explanation of CT doses, please see my answer to Ask the Experts question Q2424. \n\nIt is impossible to predict what, if any, risk is associated with this level of radiation dose. Some general information and comments on this topic can be found in the answer to Ask the Experts question Q2343. \n\nKenneth L. Miller, CHP, CMHP \nPenn State Hershey Medical Center "\n\nhttp://hps.org/publicinformation/ate/q2748.html
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Neither MRI nor CT/X-ray uses a radioactive contrast (dye).  The only imaging modality that uses that is nuclear medicine.  To read more about the contrast used in MRI, try the links below:\n\nhttp://www.cc.nih.gov/drd/patedu.html\n\n"If an injection is needed, what is injected and how is it given?\nIf an injection is required to complete your scan, a contrast agent called Gadolinium is used.  This contrast causes the tissues and blood vessels of the body to be seen more clearly than with conventional, non-contrasted MRI.  Gadolinium is injected into the body through veins in your arm or hand.  Gadolinium is a substance that reacts like iron in the body, and produces few side effects when used.  You may feel a cool sensation when the contrast is injected.  You may also get a metallic taste in you mouth, however, these effects usually subside in a few seconds."\n\nhttp://www.srhc.com/services/radiology/mri/faqs.html
917527
The Drs will fully examine the patient from head to toe,then a you will be sent to have a ct scan,m r i scan, and x-rays.Then the necessary treatment will be given.