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How
can we compare an ultrasound examination to a full dose of radiation to the
body???
Most
sites don't do rib, nasal and skull x-rays (in some cases), lateral chests on
paeds etc as the dose is considered unnecessary versus benefit as management for
say rib # will not change, unless lungs are involved! (As CXR should only be
done for rib#'s)
So
having said that, why do we limit current examinations due to patient dose, and
yet allow full body CT?
Why
are we so particular with gonadal sheilding, compliance testing to ensure skin
dose is a minimum, and have such strict education to reduce repeats, but full
body CT is ok!!
Ultrasound risk versus benifit can not be compared to
CT. Although most anatomy scans are normal, they do provide other
essential information that may be missed form clinical examination alone, such
as placental position and confusion over fetal lie....This scan affects 2
individuals and is relatively much safer that CT.
As for
mammo, the secret here is early detection of Ca without clinical symtoms has a
much greater success rate. How is this different? Much smaller dose
to a specific region!
I don't think that the latter as screening
tools are in the same league as full body CT...
Just
my thoughts
Gail
M
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