Let's communicate in English!コミュのIs the CT scan effective?

I read an article written about CT scan
and was so surprised!!! (><)

This is that article...

---------------------------------------------------

Early cancer testing is a good idea,
but it might not be a lifesaver.
A study published in the journal of
the American Medical Association finds
that CT scans to detect lung cancers
may not result in fewer deaths.

Using statistical models,the authors
calculated that when small lesions
were diagnosed in patients,they ended up
with the same mortality rate as those
not screened.

It turns out that the scans could
pick up growths that don't progress
into cancer.

TIME MARCH 19,2007
----------------------------------------------

Really??? Is that true? (^^;

Until now, I've been believing
that the CT scan is effective for
detecting lung cancers.

Even if that is true, I think
the CT scan is important diagnostic devices...