During radiotherapy, what is a common indicator of the quality of image display?

In radiotherapy, the quality of image display is critically assessed through several factors, with contrast being one of the most significant indicators. Contrast refers to the difference in brightness between the various structures in an image, allowing clinicians to distinguish between normal tissue, tumors, and other anatomical features. High contrast improves the visibility of structures, making it easier to identify and delineate target areas for treatment planning and execution.

While resolution, brightness, and field shape also play important roles in the overall quality of radiotherapy images, they serve different purposes. Resolution pertains to the detail and clarity of the image, while brightness affects the overall lightness or darkness of the image presentation. Field shape refers to the outline of the treatment area but is not inherently related to image quality in the same way that contrast is. Thus, contrast stands out as a primary measure of image quality, crucial for effective treatment planning and execution.