Sunday 10 August 2014

FRCR MCQ ----Computed Radiography.

19.True regarding computed radiography.
a.photostimulable phosphor have norrow dynamic range
b.there is a linear relationship between signal from a computed radiography plate and dose to the plate
c.the latitude of the CR system is very much greater than for conventional radiography
d.choice of gradation curve are dependent on the projection

e.histogram analysis involves an analysis of the distribution of the light intensities outside  the collimated area

ANS OF PREVIOUS BLOG

15.True regarding rotating anode 

a.make tube capable of withastanding high generated heat
b.theoretically rotate at 3000 rpm
c.beveled edge in tungsten disc
d.spread the heat produced during an exposure
e.the diameter of the tungsten disc  affects the maximum permissible loading of the anode
15.abcde---- Rotating anode  in x ray tube  make tube capable of withastanding high generated heat by spreading  the heat produced during an exposure,the diameter of the tungsten disc  affects the maximum permissible loading of the anode.Rotating anode has beveled edge and it theoretically rotate at 3000 rpm.[Chapter 2,Page 15, Christensen’s Physics of Diagnostic radiology]

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