RADD 2501 Class Notes - Control Scatter PowerPoint

RADD 2501 Class Notes - Control Scatter PowerPoint -...

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Unformatted text preview: Interactions with Matter Interactions Review Quiz Review a Which of these x-ray interactions with matter Which is/are related to the energy of the x-ray? is/are • • • • • a a a a a A. B. C. D. E. 1. 2. 3. 4. 5. Photoelectric absorption Coherent Scatter Compton Scatter Pair Production Photodisintegration 1 only 1 and 2 1, 2 and 3 4 only 1, 2, 3, 4 and 5 1 Review Interactions with Review Matter Matter 1. Which of the five interactions with 1. matter discussed in class are important in diagnostic level radiography? in a 2. Which of the x-ray interactions with 2. matter is more likely to occur with high atomic number tissues? atomic a Which x-ray interaction with matter is Which related to the energy of the x-ray photon? photon? a 2 More Review… 4. Which x-ray interactions is the most 4. likely to occur at energies below 10 keV? keV? a 5. Which x-ray interaction with matter is 5. most likely to occur at energies between 10-60 keV? 10-60 a 6. Which x-ray interaction with matter is 6. most likely to occur at energies greater than 60 keV? than a 3 Moving on…. 7. Which shell level is ionized in the 7. photoelectric absorption interaction? photoelectric a 8. What happens to the original x-ray 8. following the photoelectric interaction? following a 9. Which shell level is ionized in the 9. Compton scatter interaction with matter? matter? a 10. What happens to the original x-ray 10. following the Compton scatter 4 interaction? interaction? a Done…. 11. What happens to the original x-ray 11. following the Coherent scatter interaction? interaction? a 12. State three other names for the 12. Coherent scatter interaction? Coherent a 5 CONTROL OF SCATTER RADIATION 6 7 1. USE RELATIVELY 1. LOW kVp TECHNIQUES LOW a a Compton scatter interactions Compton INCREASE INCREASE a as kVp INCREASES as kVp Use optimum kVp techniques! 8 2. USE COMPRESSION Decreased patient thickness a Decreased Compton scatter interactions Decreased with matter with a 9 PA vs. AP Lumbar Spine PA Exam Exam 10 3. COLLIMATE! As the collimated field size decreases a Compton scatter interactions with Compton matter decrease matter a 11 12 WHEN COLLIMATING WHEN ‘SIGNIFICANTLY” ‘SIGNIFICANTLY” a Increase mAs by 50% Increase 50% 13 4. USE GRIDS (BUCKY) a Grids are the best device that absorb Grids device scatter scatter 14 CONTROL OF SCATTER CONTROL TO BE CONTINUED……. TO 15 ...
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This note was uploaded on 11/22/2011 for the course RADD 2501 taught by Professor Sandyeverage during the Winter '11 term at Life Chiropractic College West.

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