Types of Radiation
Interactions with Matter
Units of Measurement
Acute Radiation Syndromes
Radiation Monitoring
100

-Largest Particles

-Highly Ionizing

-Do not Travel Far

Alpha

100

-Medium Energy

-Absorbs the Energy

-Produces radiographic scale

-Patient receives their dose

Photoelectric Interaction

100

-measures the amount of ionization in air

-measures x-ray tube output/ODH

Roentgen or Coulomb/kg

100

Four Stages of Symptoms Experiences from very high dose of radiation

1. Prodromal Stage

2. Latent Period

3. Manifest Stage

4. Recovery or Death

100

-Immediate reading

-used for pregnant students/technologist

Pocket Dosimeter

200

-Different Energies

-Absorbed by matter or passes through it

x-rays

200

-Technologist receives their dose

-Medium Energy

-interacts with electrons in the patients body and boots electron from atom.


Compton Scattering

200

-measurement for radioactivity in nuclear medicine

-the rate of radiation decay

Curie (Ci)

200

-Occurs at a level of 1000-5000 rads/10-50 Gy

-Life Expectancy: 5-10 Days

Gastro-Intestinal Syndrome

200

-Film enclosed in plastic with special filters

Film Badge

300

-Smaller Particles

-Stopped by aluminum

Beta

300

-Low energy

-Energy In = Energy Out

-May cause fogging

Classic Coherent

300

-amount of energy absorbed

-fractionation: Large amounts divided over multiple visits

-Gy a= Air  & Gy t = Tissue

*think Patient*

Radiation Absorbed Dose

Gray-Gy

300

-Occurs at a level of 200-1000 rads/2-10 Gy

-Life Expectancy: 10-21 Days

-Can survival with a Bone Marrow Transplant

Bone Marrow or Hematologic Syndrome
300

-Laser light stimulates the aluminum oxide

Optically Stimulated Luminescence (OSL) Dositmeter

400
-Very Small Rays

-Lowly Ionizing

Gamma

400

-Very high Energy

-Creates a pair of particles and destroys other atoms

-Used in Radiation Therapy to Kill Cancer

-Energy comes in, creates matter, energy comes out

Pair Production

400

-Relates to occupational dose

*think employee*

Radiation Equivalent Man

Sievert (SI)

400

Production of Cancer

Carcinogenesis

400

-Lithium Fluoride Crystals

Thermoluninescent (TLD) Dosimeter

500

In what field of radiology would you find gamma rays?

Nuclear Medicine

500

-Very, Very high energy

-used in  industrial radiology

-10 MeV

-Think Welding

photodisintegration

500

-the amount of energy transferred to a mass of air

Air Kerma

500

-Occurs at a level of 5000 rads/50+ Gy

-Life Expectancy: a fews hours to 3 Days

Central Nervous System (CNS) or

Cerebrovascular Syndrome

500

The 3 Cardinal Principles

Time

Distance

Shielding

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