Dayu Gai ◉ ◈

If an aluminum filter 5 mm thick transmits 25% of a monoenergetic x-ray beam, then 10 mm will transmit:

Electrons striking the tungsten anode of an x-ray tube with 80 keV energy can produce...

The finite size of the x-ray tube focal spot gives rise to...

To reduce perceived image noise by a factor of 10, the number of information carriers (x-ray photons) must ideally be increased by a factor of...

The x-ray tube current (mA) influences which one of the following parameters?

The proportion of the energy of an electron beam incident on the x-ray tube anode that is converted into x-rays is approximately...

A narrow beam of monoenergetic x-ray photons is directed from an x-ray tube located 50cm above the surface of a water-filled container 20cm thick. The half value layer for the beam of x-ray photons is 10cm of water. The exposure at the bottom of the container relative to that incident on the surface is about...

The annual effective dose limit for members of the public is...

An apron with a 0.5 mm lead equivalent thickness typically attenuates scattered 100 kVp x-rays by what amount?

A hypothetical patient receives an entrance skin dose of 20 Gy after a cardiac pacemaker insertion. The most likely effect is which of the following?

Which of the following dose reduction techniques will improve image quality?