Spectroscopic imaging determines the levels of choline and citrate in the prostate. Choline is high, citrate is low in prostate cancer tissue. In healthy tissue choline is low, citrate is high.
The two procedures, MRI and MRSI imaging are carried out simultaneously. An endorectal coil provides the MRSI data. Generally, it is considered that if the MRI and MRS agree, then the accuracy of positively diagnosing prostate cancer is about 75% to 90%.
For detailed information: http://www.prostate-cancer.org/pcricms/node/169
Note. This page is currently being revised.