Doctor insights on:
Cat Scans And Radiation
Physics: The physical phenomena on which these imaging techniques are built are very different, each is best suited for different purposes. Cat scans are sophisticated x ray, they rely on the degree of absorption of gamma rays (bones, ca, other metals will contrast most). Mri is better for softer tissue imaging because it depends more on the behavior of hydrogen atoms and h2o in the strong magnetic field. ...Read more
This is light of extremely short wavelengths typically produced either among the stars / in cosmic rays or by radioactive element decay. Gamma rays form the background of normal radiation in which we all live; it is substantially greater than the exposure we get from imaging scans or should get from ...Read more
Help! i had a stomach cat scan in oct 2013 and two brain cat scans. Gi doc recommends I have another cat scan due to stomach issues. Radiation to much?
Good question: Were you told why the scans were ordered? ...Read more
For Dental implants evaluations, do you really need CT Scan. Any concerns from using CAT Scan – Kodak 9500 Cone Beam Scanner. How much radiations?
The decision: to use diagnostic X-rays is a risk/benefit analysis. The theoretical risk of a CT scan is very low. If the CT scans were medically indicated, it wasn't too much radiation. If the CT scans were unnecessary, then it was. You can go to xrayrisk.com and calculate your theoretical increased cancer risk from the scans. ...Read moreSee 1 more doctor answer
Dependingscans done: Scans vary and some scan are very high dose and large volume. Others are small and of low volume. See this site: http://www.Xrayrisk.Com/calculator/calculator.Php good luck. ...Read more
Had a lot of CT scans.My dr always told me, cells repair after exposure to CT. How is radiation cumulative? How is the damage cumulative? Thank you
Relax: While evidence-based physicians are required by the strictest laws to tell you the truth, it's actually profitable for charlatans to exaggerate, cynically, the dangers of today's medicine. The extra radiation you get from a CT scan today is equal to what you'd get from cosmic rays from living in Denver instead of Topeka for two months. The increased cancer risk isn't measurable. ...Read more
Sometimes same dose: Background radiation at sea level: 3 msv per year, denver residents get: 6 msv per year, cross country flight: 0.02 msv, x ray chest: 0.06 msv, ct head: 3 msv, ct chest: 5 msv (equivalent to 100 chest xrays) ct abdomen: 5-10, average bone scan 6.5 msv. Radiation depends on size of patient." radiation affects growing body in children more than adults. Doses to children are much less. ...Read moreSee 1 more doctor answer
I have had 3 ct scans of my lungs. Now I need one for headaches. Is this too much radiation? Scared.
You're fine: Each CT scan delivers radiation equivalent to being an airline pilot or flight crew member for a few months. Nobody's shown a measurable extra risk for cancer in these folks. If you need a scan, get it -- radiation is the least of your worries if you need a CT for headache. The prospect of brain disease is serious and I wish you a good outcome. ...Read moreSee 1 more doctor answer
No...but: There is some radiation with a ct scan but this is relatively minimal and thus the risk of long term stimulation of cancer is very, very tiny. None the less anytime any extra radiation can be avoided that's a good thing, and surely your doctor had a good reason to order the test. Of course if you are pregnant or think you might be let your doctor know. Hope this helps. ...Read more
Guck n simple 08-10 br ca chemo radiation mastectomy left breast CT scan 2wks ago enlarged nodes in mediastatin and nodes on right lung. Now what?
While: You are in the scanner and the images are being taken you are receiving a relatively small dose of radiation. Often this is less than a minute depending on what is being scanned. ...Read more
Too much?: "too much" is a relative term. Basically no. If you have a medical condition, ie cancer that is being monitored by ct then the benefits outweigh the risks. If you are getting a ct for no reason then the risks (small but finite) outweigh the benefits. Any medical procedure is not a binary state. There is a continuum of risks and benefits. ...Read more
Low: The technicians know how to properly control the radiation levels that you would be receiving. ...Read more
It depends, if ever.: The tissue damage done by radiation exposure is related to the dose, the age of the patient and the organs that receive the dose, as well as genetic factors relating to the patient. Also, the time between exposures is important. Almost any single ct exam of any one body part is exceptionally unlikely to cause any harm. The issue is repeated imaging of the same area, particularly in young patients. ...Read more
Will having 2 full body CT scans totally 55mSv effect my future children? Does all of that radiation damage my eggs?
No, Not likely: Medical use of X-Rays such as CT scans is considered safe. Most people will have 2 or more body CT scans in their life time without any harm. The dose of radiation received by your body is not sufficient to cause any harm to your Ovaries. So it should not affect your fertility. ...Read moreSee 1 more doctor answer