Page 193 - Pharmaceutics IV (02-06-01305)

It can be produced by the decay of radioactive nuclei or certain
subatomic particles .
Unit of Radiation
a-Curie (Ci): Measure of radioactivity /unit mass of material.
B -Becquered (Bq): One Bq represent the amount of radiation
produced from one disintegration /second(dps)
One Ci is 37 billion Bq or 37 GBq.
C-Rad: Express the absorbed dose of ionizing radiation.
One Rad represents the amount of radiation that releases energy of
100 ergs /gm of matter.
d-rem :When radiation is applied in humans is expressed .
Rem is the dosage in rads that causes the same amount of biological
injury as 1 rad of X-rays or gamma rays.
e- Roentgen(R) :Quantitate the exposure to radiation.
f-Erg: Represents the amount of radiation that releases energy or
work that equals 10-7 Joules .
Si system of units ,where Bq is the unit of radioactivity,Gray(Gry)
Is the unit of expression of absorbed dose ,Sievert(Sv)is the dose
equivalent unit & exposure is represented in coulomb/kg body wt.

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