What are the image quality indicators in digital radiography?

In digital radiography, image quality is critically determined by several key indicators, including spatial resolution, contrast resolution, and noise.

Spatial resolution refers to the ability to distinguish small details in an image, which is critical for accurate diagnosis. Higher spatial resolution means finer details can be visualized, allowing radiologists to identify subtle pathologies.

Contrast resolution pertains to the ability to differentiate between various densities within the image, enabling better visualization of structures and anomalies. A higher contrast resolution allows for better detection of differences in tissue types, which is particularly important in soft tissue imaging.

Noise in digital imaging is the random fluctuations in pixel values, which can obscure detail and reduce clarity. Effective digital radiography systems aim to minimize noise to enhance the quality of the image, allowing for clearer and more diagnostic outputs.

The other options present factors that, while important in radiography, do not directly define the image quality in the same way. For instance, exposure time and image brightness relate to the technical settings of the imaging process, while collimation accuracy and patient dose are essential for radiation safety and efficiency, but they do not directly inform about the quality indicators of the resultant image. Thus, focusing on spatial resolution, contrast resolution, and noise provides a comprehensive understanding of the