Download presentation
Presentation is loading. Please wait.
1
CHAPTER 7 X-RAY PRODUCTION
2
Current = number of electrons = quantity = mAs
Energy = quality = kVp
3
WHAT HAPPENS WHEN ELECTRONS HIT THE ANODE
I CM. –DISTANCE BETWEEN FILAMENT AND TUBE TARGET PROJECTIVE ELECTRONS TRANSFER THEIR ENERGY PENETRATE THE TARGET CONVERT KE INTO HEAT AND X-RAYS THE ELECTRONS THEMSELVES ARE CONDUCTED THROUGH THE X-RAY ANODE ASSEMBLY AND OUT.
4
ANODE HEAT INFRARED RADIATION NO TRANSFER OF ENERGY FROM ELECTRON
EXCITES OUTER SHELL ELECTRON OF ANODE TARGET DOUBLE THE TUBE CURRENT = DOUBLE THE HEAT
5
Efficiency of x-ray production
Increases with kVp See page 125
6
CHARACTERISTIC RADIATION
USEFUL BEAM INNER SHELL At 100 kVp = 15% of the x-rays produced are characteristic At 65kVp = none are characteristic
7
BREMSTRAULUNG BRAKING At 65kVp all are bremstraulung
8
X-ray emission spectrum
9
The emission spectrum Large the “bump” = more quantity pg 131, figure 7-11 Farther to the right = more quality pg 131, figure 7-12 Added filtration decreases intensity but increases quality. Pg 132, figure 7-13 Increased atomic number of target Single phase vs three phase in efficiency and quality pg 134, figure 7-16
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.