11C Acetate Imaging Post Prostatectomy
| Status: | Completed |
|---|---|
| Conditions: | Prostate Cancer, Cancer |
| Therapuetic Areas: | Oncology |
| Healthy: | No |
| Age Range: | 18 - Any |
| Updated: | 11/30/-0001 |
| Start Date: | December 2011 |
| End Date: | March 2014 |
| Contact: | Umar Mahmood, MD, PhD |
| Email: | umahmood@partners.org |
| Phone: | 617-726-6477 |
Use of 11C Acetate Imaging for Improved Prediction of the Effectiveness of Salvage Pelvic Radiation Post Prostatectomy: A Pilot Study
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 scan will determine whether this type of scanning is helpful but it will
not be used to make decisions about your medical care.
If you decide to participate in the study and are eligible, you will undergo a single [11C]
acetate PET scan. This scan is designed to detect small amounts of your tumor that were not
detected by the CT scan or the bone scan. On the day of the scan, you will fast for at least
four hours prior to being given the tracer injection by vein. You will then be scanned in
the PET scanner. The entire procedure will take approximately 2 hours.
The investigators would like to keep track of your medical condition after you have
completed your scan. The investigators would like to do this by looking up information in
your medical record during the year following the scan to see how you are doing. Checking
your condition helps us understand whether the [11C] acetate PET scan will be helpful to
other patients in the future.
Inclusion Criteria:
- Histologically or cytologically confirmed adenocarcinoma of the prostate
- History of radical prostatectomy
- Age ≥18 years
- PSA ≥0.5 and <4.0 ng/mL
- Abdominal-Pelvic CT scan without evidence of prostate cancer
- 99mTc MDP bone scan without evidence of prostate cancer
- Patient and clinician decision to proceed to salvage pelvic radiation therapy
Exclusion Criteria:
- Presence of known extra-pelvic evidence of prostate cancer
- Unable to fast for 4 hours
- Uncontrolled diabetes
- History of bilateral orchiectomies
- Ongoing treatment with any systemic therapy intended for the treatment of prostate
cancer
We found this trial at
1
site
Click here to add this to my saved trials
