A standard chest x-ray is normally performed at 72 inches SID. You need to do a portable x-ray for a patient in the ER. Due to the patient's room size, you can't get the full 72 inches. Which exposure factor will you need to adjust to compensate for this change? Which equation will you use to calculate the change? Choose a SID between 50-65 inches and show which mathematical equation that you will use. For the purpose of this assignment, you can choose any number for your original exposure factor that you are changing using the formula.
