Which type of radiation is most commonly used in diagnostic imaging?

X-rays are the most commonly used type of radiation in diagnostic imaging due to their ability to penetrate body tissues and provide high-resolution images of internal structures. The fundamental principle of X-ray imaging relies on the differential absorption of X-rays by various tissues in the body, which allows for clear visualization of bones and soft tissues on radiographic films or digital detectors.

X-rays have a shorter wavelength compared to other types of radiation, which helps in producing detailed images necessary for accurate diagnoses. They are widely utilized in various imaging modalities, including conventional radiography, computed tomography (CT), and fluoroscopy, making them indispensable in medical diagnostics.

In contrast, alpha radiation is largely absorbed by the skin and does not penetrate tissues effectively, limiting its use in imaging. Beta radiation, while capable of penetrating tissues, is generally not used for imaging due to poor image quality and the associated safety concerns with handling radioactive materials. Gamma radiation, though it can also penetrate the body and is used in nuclear medicine for imaging, is generally less common in standard diagnostic imaging compared to X-rays.