Nuclear medicine

Question 1

Transmutation

Answer 1

Trans

Change symbol (atomic number= Z): Alfa and beta decay

(number of protons)

Question 2

Isomeric transition

Answer 2

Higher energy to lower energy= Emits gamma ray

Question 3

Metastable

Answer 3

long half lifes

Question 4

Nucledi mass (A)=

Answer 4

Protons (Z) + Neutrons (N)

Question 5

Beta minus

Answer 5

Y90-> Zr90

N--> P+
Electron release (e-)

Daugther atomic number is INCREASED +1

Question 6

Beta plus

Answer 6

F18->O18

P+ –> N

Emits positrons

Daughter atomic number (Z) is DECREASED by 1

Question 7

Alpha emission

Answer 7

Radon 222 (lung cancer guy)-> Polonium 218

1000000 ev

Question 8

Electron capture

Answer 8

Z-1 (competes with beta decay)

Emits characteristic x rays (different from positron emission of beta plus decay)
as electron comes to K shell.

I 123 decays by electron capture

Question 9

Effective half life

Answer 9

ALWAYS shorter than physical and biological half life

1/effective= 1/physical + 1/physical

Question 10

Cyclotron produced

Answer 10

• Usually decays by electron capture or beta plus decay
• In 111, Ga 67 and I123
• F18

Electron capture or Beta plus most of them

Question 11

Fission products

Answer 11

I131, Mo 99, Xe 133, Sr90

Beta minus decays most of them

Question 12

I131

Answer 12

0.5 mm

Question 13

Electron capture radionuclide

Answer 13

I 123

Question 14

Isomeric transition radionisotope

Answer 14

Tc 99 m

Question 15

Alpoha emiter

Answer 15

Radon 222

Question 16

Beta plus decay

Answer 16

F18

Question 17

700 MBq

Answer 17

20 mCi

Question 18

Secuar equilibrium

Answer 18

Activity of parent and daughter are exactly equal