Traditional Culture Encyclopedia - Photography and portraiture - The latest digitization is

The latest digitization is

Answer: b

In 1970s, CT, MR, ultrasound, nuclear medicine, DSA, gastrointestinal radiography and other medical imaging equipment were digitized one after another. In contrast, the traditional X-ray photography still stays in the original mode. It was not until the appearance of CR system in the early 1980s that the images of traditional X-ray photography were digitized.