Lecture 4 Flashcards
1
Q
disintegration
A
release of energy from a radioactive nucleus
2
Q
rate of decay constant
A
different for each radionuclide
upside y
also known as the disintegration fraction
0.693/ half life
3
Q
137Cs
A
half life 30.2 years
4
Q
18F
A
half life 110 minutes
5
Q
68Ga
A
half life 68 minutes
6
Q
177Lu
A
half life 6.73 days
7
Q
99Mo
A
half life 66 hours
8
Q
99mTc
A
half life 6 hours
9
Q
1 curie
A
3.7x10^10 atoms disintegrating per second (dps)
10
Q
becquerel
A
system international (SI) unit for radioactivity
defined as 1 dps
11
Q
important conversion
A
1 Ci = 3.7x10^10 Bq = 37 GBq
12
Q
dose calibrator
A
patient dose is placed in dose calibrator
current activity shown
pushing time button allows user to enter the desired time
calibrator calculates decayed activity and displays under the current activity
