Explain why for beta ray shielding, usually two shields rather than one single shield are used

There are an alpha, beta and gamma particles that you all need to use only once. One of them can be thrown away, one of them needs to be hidden in your pocket, and you need to hold the last one. In order to stay safe from radioactivity, where should you place them? Throw away: ____ In your pocket:____ In your hand:_____ Options: Beta, Alpha, Gamma.   Please explain fully.   Thank you!

You suspect that a patient’s arm is broken. What type of radiation might help you find out?

QUESTION 38 Rank the following procedures from lowest effective radiation dose to highest. The first choice should have little to no radiation and the last choice should have the highest radiaiton exposure. MRI of the brain extremity x-ray (ex. hand) full spine x-ray (cervical, thoracic, AND lumbar series) PET/CT fusion of the abdomen and pelvis