Which of the following is not a type of image receptor used in digital radiography?

In the context of digital radiography, film is not considered a type of image receptor used. Digital radiography relies on various digital imaging technologies that convert X-rays into digital signals for image creation and processing.

Phosphor storage plates (PSP) are a form of digital imaging where an imaging plate contains a photostimulable phosphor, capturing the radiation exposure and later being read by a specialized scanner to produce an image. Charge-coupled devices (CCD) and complementary metal-oxide-semiconductor (CMOS) sensors are electronic sensors that directly convert incoming X-ray photons into electronic signals, allowing immediate digital image acquisition.

Film, traditionally used in analog radiography, does not fit within the digital framework as it requires chemical processing to develop images and does not provide the rapid image capture or enhancement features associated with digital systems. Thus, designating film as the option that is not a type of image receptor utilized in digital radiography is accurate.