Radiologic Rockstar 2025: Ace the ARRT Exam and Shine Bright!

To be suitable for use in an intensifying screen, a phosphor must demonstrate high conversion efficiency. This means that it should effectively convert the energy from x-rays into visible light, which is crucial for reducing the amount of radiation needed to produce images while maintaining image quality. High conversion efficiency directly contributes to improved image contrast and reduces patient exposure to ionizing radiation, making it a vital characteristic for safety and clarity in radiographic imaging.

While considering the atomic number, a high atomic number is desirable because it generally correlates with better x-ray absorption. However, the primary focus for intensifying screens is on the conversion efficiency rather than just the atomic number alone. Thus, having both a high atomic number and high conversion efficiency can enhance performance, but the high conversion efficiency is the more critical factor that fulfills the goal of an intensifying screen. This attribute allows for more effective imaging by utilizing less radiation without sacrificing quality, further supporting the selected answer.