473.True regarding mammography.
a. aims to show microcacifications that
may be 100micrometer or less
b. show tissues having much lower
intrinsic contrast
c. atomic number of glandular tissues
and adipose tissue (approx 7.4 and 6.5 respectively)
d. use of a broad bremsstrahlung
spectrum for imaging
e. target materials used for
mammography are tungsten ,molybdenum(z=42)
and rhodium(z=45)
ANS OF PREVOIUS BLOG
465.True regarding causes of
unsharpness in film –screen
a.thickness of phosphor
b.colored dyes
c.crossover
d.parallax
e.poor film-screen contact
465.acde--- Colored dyes
in the screen decrease the
unsharpness. (Chapter 4,page no.72-73,second edition (2008),Farr’s Physics for
Medical Imaging).
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