FRCR MCQ -----X RAY TUBE

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

ANS OF PREVIOUS BLOG

1.True regarding iodinated contrast medium.

a. tri-iodo benzene ring derivatives with three atoms of iodine at 3,4,6 positions (in monomers)

b. tri-iodo benzene ring derivatives with six atoms of iodine per molecule of the ring anion (in dimers)

c. very hydrophobic , have high lipid solubility, low toxicity,

d. high binding affinities for protein, receptors or membranes

e. have molecular weights less than 2000

1.be---- iodinated contrast medium is  tri-iodo benzene ring derivatives with three atoms of iodine at 2,4,6 positions (in monomers) and with six atoms of iodine per molecule of the ring anion (in dimers).They are very hydrophilic, have low lipid solubility, low toxicity, low binding affinities for protein, receptors or membranes,have molecular weights less than 2000. .( CHAPTER 2  ,Adam: Grainger & Allison's Diagnostic Radiology, 5th ed.)