Which of the following factors is least likely to influence image resolution?

Image resolution in radiology refers to the ability to distinguish fine details in the image. Various factors can influence this aspect, and understanding these influences is crucial for optimizing image quality.

The factor identified as least likely to influence image resolution is film processing time. While film processing is essential for the development of images, it primarily affects the overall image quality and contrast rather than resolution directly. The resolution depends more on how detail is recorded and transferred onto the film rather than the duration of the processing.

Film speed plays a critical role because faster film speeds often result in a decrease in resolution due to larger silver halide crystals that may lead to more graininess.

Contact between film and screen is vital as poor contact can lead to blurring and decreased sharpness, directly affecting resolution.

Object-to-image distance (OID) is another significant factor; an increased distance can result in magnification and loss of detail, thus impacting resolution negatively.

Each of these factors interacts with the imaging system's capacity to capture and render fine details, while film processing, although important for developing a usable image, does not directly modify the resolution itself.