Explain the concept of image resolution in radiology.

Image resolution in radiology fundamentally refers to the system's capability to accurately distinguish between two separate points or structures within an image. High resolution means that small structures can be identified distinctly and maintain their individual characteristics, which is crucial for accurate diagnosis and treatment planning.

Resolution is a critical factor in various imaging modalities, such as X-ray, MRI, and ultrasound, because it directly affects the quality of the images produced. For instance, if two adjacent bones or tissues are not clearly separated, it may be challenging for a radiologist to make an accurate interpretation or diagnose an ailment.

Other concepts like clarity, brightness, contrast, and processing speed are all relevant to imaging; however, they do not encapsulate the core definition of resolution. Clarity relates more to overall image quality, while brightness and contrast deal with the image's visual characteristics rather than point distinction. The speed of image capture pertains to efficiency but not to the accuracy of visual information conveyed in the image. Therefore, the ability to distinguish between separate points or structures is what defines image resolution and its clinical significance in radiology.