#Digital
Radiography# Chest full name fluoroscopy, X-ray inspection method is used. It
is the use of X-ray a characteristic with penetrating, fluorescence and
photographic effects, so that the body to form an image on the screen, because
the body tissues are different density and thickness, when X-ray penetrates
human tissues, X-ray is absorbed different levels, so the amount of X-rays to
reach the on-screen are differences in the formation of different images of
black and white contrast, provide the basis for the doctor's diagnosis.
After accepting the emergence of
human health risks of radiation exposure from a variety of rays cause changes
in cells and tissues atoms and molecules made up of atoms by ionizing role
chest radiation amount is the largest, do a chest X-ray examination in
equivalent to shoot 10 times X-ray examination.
X-ray examination is a double edged sword. X-rays are harmful, but
a lot of disease diagnosis can not do without it. In all means of X-ray
examination, X-ray chest harm has been very clear, the United States, Japan and
other developed countries, basically eliminated the method. A few countries
still using this method, are also trying to reduce usage, such as the United
Kingdom use was only 0.2 percent, and requires, when used, must check the site,
especially for non-gonadal, thyroid shield to protect, if the doctor is imperfect,
it may therefore be revoked radiation license. In China's relevant laws and
regulations, "for infant, child, children, youth physical examination,
chest X-ray examination should not be included in the routine examination;
employees of pre-employment or periodic medical examinations, chest X-ray
inspection interval is generally not less than two years. "Regrettably,
however, it is that China's use of X-ray chest probability is very high, in
many places, have become an
annual physical examination, entrance examination, medical practitioners, as
well as units of the physical examination of a "repertoire"!
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