ASLI YILDIRIM. Medical applications of particle physics General characteristics of detectors (5 th Chapter). APPLICATIONS OF PARTICLE PHYSICS. Medical applications such as producing X rays, protons, neutrons for diagnostic or treatment purposes. Security such as nuclear waste monitoring
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Medical applications of particle physics
General characteristics of detectors (5th Chapter)
* After injecting radiotracer to human body, gamma rays produced and detected.
* This information is transformed into images by using tomography tecniniques.
After first detection, one of detected photons has undergone Compton scattering
Two photon from different annihilation
Its converts gamma rays to optical photons
It converts light into electrical signal
It prepares the signal for computational processing
Thicker detectors improve sensitivity, but spatial resolution becomes worse
Thinner detectors give better resolution and better images but they have lower sensivity
General characteristics of detectors (5 resolution becomes worseth Chapter)
Transfer all the radiation energy into detector mass, then we can observe it.
Response is relation between radiation energy and output signal.
Ability of distinguish very close energy levels
Non-extendable occurs when detector looses its sensitivity during dead time
Extendable occurs when detector does not loose its sensitivity during dead time