Expert: Jeremy Oldham - 11/27/2011

Question
hi
my question is
1-i read
Cancers caused by the ct radiation appear 20-30 years after
even more and i think thats good
but my second question can 3 or 4 msv from a ct scan
cause brain tumor in just 11 month or 1 year?
is that possible as seen on the people of japan

2-does 3 or 4 msv (radiation) from a head ct enough to cause brain tumor
do the people of japan got brain tumor from 3 or 4 msv of radiation after 1 year or even after 20 years?

please can you answer my 2 questions please

Answer
Natal:
 Radiation consists of waves of energy (X-ray) associated with electric and magnetic fields resulting from the acceleration of an electric charge.  It is not the same as a treatment like Chemotherapy which enters the blood stream and may impact multiple organs in the body simultaneously.  
 Still, ionizing radiation has been proven to be linked to some cancers (i.e. stomach, skin, thyroid, breast) but there are no conclusive studies that link it to brain cancer.  Furthermore, most studies did not indicate which factors were included in the increase of cancer risk along with radiation exposure.  That means factors like stress, diet, and others, were not considered when determining if radiation exposure alone was in fact the only contributor to increased cancer risk.
 I hope this answers your question and if you have any others please don't hesitate to ask.