1 / 10

Radiation Quantities and Units

Radiation Quantities and Units. Chapter 3 Sherer. Review-Pages 53-56. Somatic effects Long term somatic Genetic effects Box 3-1. Page 56-58- specifically. Tolerance dose was replaced with Maximum Permissible dose (MPD)-dose limits-effective dose

hye
Télécharger la présentation

Radiation Quantities and Units

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radiation Quantities and Units Chapter 3 Sherer

  2. Review-Pages 53-56 • Somatic effects • Long term somatic • Genetic effects • Box 3-1

  3. Page 56-58- specifically • Tolerance dose was replaced with Maximum Permissible dose (MPD)-dose limits-effective dose • Safe occupations (clerical) has a risk of 10 -4 per year- same as radiography • EfD – type of radiation and the sensitivity of the tissue being exposed. The Sievert is the unit of measurement

  4. Focus on these terms and definitions-page. Begins on pg 58 • Exposure (X) • Absorbed dose (D) • Equivalent dose (EqD) • Effective dose (EfD) • Overall risk based on absorbed dose, tissue and type of radiation • See Box 3-3 (see next slide) • Absorbed Dose

  5. Box 3-3(follow-up questions see assignment for this class) Equivalent Dose • EqD=D x Wr • Or • Sv=Gy x Wr Effective dose • EfD=D xWr x Wt

  6. Quality Factor, pg 63 Sherer • LET pg 63 Sherer "rate in which energy is deposited in the form of a charged particle or ion pair as it travels through matter“

  7. Rem = RAD x QF • LETS of 3% or less have a QF of 1 = same amount of damage of rad per rem • QUALITY FACTOR and weighting factor OF ALPHA IS 20 See box Table 3-2 Sherer • 1 RAD = 20 REM FOR ALPHA PARTICLE ABSORPTION

  8. WHICH HAS A HIGHER LET NUMBER? • X-rays (HIGH OR LOW?) • Alpha (HIGH OR LOW?) • Beta (HIGH OR LOW?) • Gamma (HIGH OR LOW?)

  9. WR associated with Equivalent Dose- table 3-2 • WT associated with Effective Dose- table 3-3

More Related