11C Acetate Imaging Post Prostatectomy

Study Summary

This research is being conducted to test an imaging technique that may be able to detect small amounts of prostate cancer that can not be detected by standard imaging. Many patients who are diagnosed with prostate cancer undergo surgery to remove the prostate. After this surgery, some patients have a PSA blood test that reveals a low but detectable level of PSA. This PSA may be produced by cancer cells in one of two locations: (1) near the area where the prostate used to be, or (2) elsewhere in the body. If the cancer is only in the area where the prostate used to be, it can be successfully treated with radiation to that area. If the cancer is elsewhere, radiation is not helpful. Currently, there is no available scan that can detect cancer when the PSA is still so low. The test used in this study is called \[11C\] acetate PET screening. \[11C\] acetate is a radioactive tracer that is given by vein to patients before PET scanning. The PET scanner then detects radioactivity from the tracer that is attached to cells within your body and uses this information to create images (pictures) on a computer screen. \[11C\] acetate PET scanning has been shown in early studies to detect smaller amounts of prostate cancer that can be detected by standard imaging tests such as CT scan and bone scan. If it is successful at detecting very small amounts of prostate cancer, \[11C\] acetate PET scanning will help doctors identify patients who will benefit from radiation therapy after their prostate has been surgically removed. It will also help them identify patients who have small amounts of prostate cancer in other parts of the body and will not benefit from radiation to the prostate area. This type of PET scan is investigational. "Investigational" means that the scan is still being studied and that research doctors are trying to find out more about it. It also means that the FDA has not approved this type of PET scan for your type of cancer. The information collected by this sca

Primary Outcome

Preliminarily demonstrate that the 11C acetate PET imaging of subjects who have experienced PSA relapse after prostatectomy for prostate cancer is more sensitive than currently available imaging techniques. Enrolled participants will have no evidence of recurrent disease on gold-standard imaging with CT abdomen/pelvis and 99mTc MDP bone scan (approximate sensitivity of 0%). The primary outcome is evidence of residual/recurrent disease as demonstrated by 11C acetate PET uptake outside of the pros

Interventions

• OTHER 11C Acetate Imaging