Are MRI and CT dangerous for health?
For everyone except patients with absolute contraindications for the study MRI is absolutely safe. In the CT scanner you are exposed to some dose of X-rays, but it is so low, that you get more radiation during a flight from Moscow to Sochi than during one procedure. All CT scanners in Medscan.rf are fitted with special software programs reducing the dose by 80%.
Can I come to Medscan.rf centers without a referral?
Yes, you can visit our center without any referrals. In such a case you will be consulted by general practitioner who in cooperation with radiologist will order you essential study to find out the reason of your complains.
How often can I undergo imaging studies?
MRI has no limitations in numbers of procedures. After CT scan, if you have to undergo it monthly – which is rare – you should ask your radiologist for report of received dose in millisieverts from the study protocol. Usual received dose is 2-5 mSv by one CT scan.
That is what one can read in Public Health Regulation (220.127.116.112-03, par. 7.10):
Limitations in patient`s received dose in diagnostic purpose are not defined. For optimisation of patient safety demands from Paragraph 2.2 should be followed.
If cumulative received dose is more than 500 mSv, further exposition should be reduced if there are no absolute indications.
If effective dose is more than 200 mSv, or cumulative dose from one source is more than 500 mSv, or cumulative dose from all the source is more 500 mSv, the special health examination by Public Health Department should be performed.
With it in mind, modern CT is almost safe, nevertheless you should track the received dose.
Objective data must be noted in the report of every study.
What is the difference between CT and MRI? (Some physicians recommend to do one or another – How should I choose?)
The difference is in the physics methods which is applied to produce the image. In fact, CT is X-ray study with additional mathematical techniques of processing. It results in multiple layer-by-layer roentgenograms of patient`s body. As for MRI, it is based on changes in human body putted into magnetic field. The result is also layer-by-layer images of the body. Both methods complement each other well, but MRI is still better for imaging of water-containing tissues like brain, liver, cartilages, ligaments and muscles. Otherwise bones, lungs and abdominal cavity are commonly studied by CT. Anyway you better follow physician recommendation choosing the right type of study.
What preparation do I need before a study?
Main rule for every procedure is not to eat for 1,5-2 hours before study. In case of more specializes examination our receptionists will clear up the preparation details for you. Detailed information you can also find in “Preparation before studies”.
C какого возраста возможно диагностировать детей?