The dosage of technetium-99m for a lung scan is 20. Ci/kg of body mass. How many millicuries of technetium-99m should be given to a 60 kg person? (Recall that 1 mCi = 1000 Ci.)
Express the radiation dose in millicuries to two significant figures.
To calculate the dosage of technetium-99m for a 60 kg person, we first convert the body mass from kg to Ci.
Body mass in Ci = (20 Ci/kg) * (60 kg) = 1200 Ci
Since 1 mCi = 1000 Ci, we can convert the dosage to millicuries.
Dosage in millicuries = 1200 Ci * (1 mCi/1000 Ci) = 1.2 mCi
Therefore, the 60 kg person should be given 1.2 millicuries of technetium-99m.
To calculate the millicuries of technetium-99m required for a 60 kg person, we'll use the given dosage of 20 Ci/kg.
First, we need to convert the weight of the person from kilograms to millicuries. To do this, we multiply the body mass in kilograms (60 kg) by the dosage (20 Ci/kg):
60 kg * 20 Ci/kg = 1200 Ci
Next, we convert Ci to millicuries by using the conversion factor of 1 mCi = 1000 Ci:
1200 Ci * (1 mCi / 1000 Ci) = 1.2 mCi
Rounding the result to two significant figures, the radiation dose in millicuries for the 60 kg person is approximately 1.2 mCi.