Which recording system exhibits the lowest image frequency?

The spot film recording system exhibits the lowest image frequency because it captures images at a specific point in time rather than continuously. This method involves the use of a film that is exposed for a brief duration to capture an image of the fluoroscopic procedure. While it's effective for certain applications, the frame rate is relatively low, which means it does not create a continuous stream of images like some of the other systems.

In contrast, systems like cinematography (cine) capture higher frame rates and provide smoother motion representation, while videotape/disc systems also record images at higher frequencies, allowing for a more fluid view of the examination. Additionally, the photospot/digital systems are designed to capture high-quality images rapidly, further emphasizing their higher image frequency capabilities compared to the spot film method. Therefore, when considering the operational characteristics of these various systems, spot film is indeed recognized for its lower frequency of image capture.