Nuclear medicine

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Nuclear medicine by Mind Map: Nuclear medicine

1. Radio activity

1.1. What is it?

1.2. Alpha radiation

1.2.1. Eject particles that carry charge of 2+ and have a mass of 4 atomic mass units

1.2.1.1. Emission of an alpha particle causes:

1.2.1.1.1. Mass number of radionuclide to decrease by 4 units

1.2.1.1.2. Atomic number to decrease by 2 units

1.2.1.2. Which are the equivalent to a nucleus of Helium.

1.2.2. Alpha particles: are radioactive particles that is made up of 2 protons and 2 neutrons

1.2.2.1. https://qph.fs.quoracdn.net/main-qimg-ffadf895ba799edd16163c3332467572.webp

1.2.2.2. When radioactive particles goes through a kind of radioactive decay, this is known as alpha decay

1.3. Beta radiation

1.3.1. beta minus decay: emission of electrons (aka beta particles)

1.3.1.1. neutron is converted into a proton

1.3.1.2. beta particle with a charge of -1 is emitted

1.3.1.3. example: converting thorium into proactinium

1.3.2. medium ionization and penetration power

1.3.3. beta plus decay: emission of positrons

1.3.3.1. Proton converted into neutron causing ejection of positrons

1.3.3.1.1. Example:

1.4. gamma radiation

1.4.1. After alpha & beta decay, surplus energy is sometimes emitted.

1.4.2. Gamma rays are just photon

1.4.2.1. Example: It DOES NOT have a charge, in the equation NOTHING change.

1.4.3. Penetration power is the highest among the three, can be block by several cm of lead

1.4.4. Frequency of the rays are higher than 10^19 Hz and are in the range of 0.0005 to 0.1nm

1.4.4.1. Does not alter the atomic number or mass number of the nucleus.

1.4.5. They are a form of electromagnetic radiation (EMR)

1.4.5.1. Their energy is greater than 100 keV

2. Medical Treatment

2.1. Diagnostic Technique in nuclear medicine

2.2. Radionuclide therapy