Question

a) Draw a diagram of an x-ray image intensifier used for medical fluoroscopic imaging. Label the 6. main components and explain their functions (10] b) Explain what is meant by the brightness gain of an image intensifier. Name and describe the two processes that contribute to this gain. Give expressions or numerical estimates where appropriate 15) c) Suppose that an x-ray beam is incident on an image intensifier having a diameter of 30 cm. For this x-ray beam, the incident air kerma rate is 0.3 HGy s and the conversion factor from air photon mm2uGy. The output of the image intensifier is kerma to photon fluence is 10 coupled to a 512x512 pixel camera capturing a moving image at 30 frames per second. If the image intensifier absorbs 60% of the incident x-ray photons, estimate the signal to noise ratio in a pixel in a single image frame. State any assumptions you make 15)

Answer 1

haro Videe or CAD Comara An-seti 右elect and Eleclsns

Phospo to Smaller dian atpppet -Convensian : aluo e ta explain gatn Apetuds圡1nab ta ono unro Lgur.neoda, taide ento dle vides Comesa i-CCD → change-Coupled Deh ce.

calculata as mǐ향alian gnio multiple