We can say for instance about patients diagnosed with tuberculosis that the X-ray tells the physician something about the disease progression in the near future:
An X-ray is essential to determine the prognosis in tuberculosis patients.
But is there a single word to describe the act of determining the patient's prognosis? I have seen the word "prognostication":
An X-ray is essential for prognostication in tuberculosis patients.
Although it appeals to me as a German, because the German language has the word "Prognostizierung", the word "prognostication" is seemingly not frequently in use. And from some sample sentences I conclude that this word also has an esoteric connotation, think Macbeth's witches and crystal balls. So, should I stick with the first version or is there a noun to describe this process?