Publications

Publications

Analysis of intraprostatic therapeutic effects in prostate cancer patients using [(11)C]-choline pet/ct after external-beam radiation therapy.

By:
Contributors: Melinda Wuest, PhD, Matthew Parliament, MD, FRCPC, Nawaid Usmani, MD, FRCPC
Curr Oncol. 2013 Apr;20(2):104-10. doi: 10.3747/co.20.1217.

Abstract

PURPOSE:

The objective of the present study was to analyze, with relatively high sensitivity and specificity, uptake properties of [(11)C]-choline in prostate cancer patients by means of positron-emission tomography (pet)/computed tomography (ct) imaging using objectively defined pet parameters to test for statistically significant changes before, during, and after external-beam radiation therapy (ebrt) and to identify the time points at which the changes occur.

METHODS:

The study enrolled 11 patients with intermediate-risk prostate cancer treated with ebrt, who were followed for up to 12 months after ebrt. The [(11)C]-choline pet scans were performed before treatment (baseline); at weeks 4 and 8 of ebrt; and at 1, 2, 3, 6, and 12 months after ebrt.

RESULTS:

Analysis of [(11)C]-choline uptake in prostate tissue before treatment resulted in a maximum standardized uptake value (suvmax) of 4.0 ± 0.4 (n = 11) at 40 minutes after injection. During week 8 of ebrt, the suvmax declined to 2.9 ± 0.1 (n = 10, p < 0.05). At 2 and 12 months after ebrt, suvmax values were 2.3 ± 0.3 (n = 10, p < 0.01) and 2.2 ± 0.2 (n = 11, p < 0.001) respectively, indicating that, after ebrt, maximum radiotracer uptake in the prostate was significantly reduced. Similar effects were observed when analyzing the tumour:muscle ratio (tmr). The tmr declined from 7.4 ± 0.6 (n = 11) before ebrt to 6.1 ± 0.4 (n = 11, nonsignificant) during week 8 of ebrt, to 5.6 ± 0.03 (n = 11, p < 0.05) at 2 months after ebrt, and to 4.4 ± 0.4 (n = 11, p < 0.001) at 12 months after ebrt.

CONCLUSIONS:

Our study demonstrated that intraprostatic [(11)C]-choline uptake in the 11 analyzed prostate cancer patients significantly declined during and after ebrt. The pet parameters SUVmax and tmr also declined significantly. These effects can be detected during radiation therapy and up to 1 year after therapy. The prognostic value of these early and statistically significant changes in intraprostatic [(11)C]-choline pet avidity during and after ebrt are not yet established. Future studies are indicated to correlate changes in [(11)C]-choline uptake parameters with long-term biochemical recurrence to further evaluate [(11)C]-choline pet changes as a possible, but currently unproven, biomarker of response.

 PubMed

Download PDF

 

Congratulations to top alumni honour awardee Dr. Ron Moore

Congratulations to Dr. Ron Moore, ’80 BSc, ’86 MD, ’91 PhD, who will receive an Alumni Honour Award from University of Alberta President David H. Turpin during the Alumni Awards Ceremony on Monday, Sept. 24, 2018, at the Northern Alberta Jubilee Auditorium in Edmonton.
The Alumni Honour Award recognizes the significant achievements and contributions by University of Alberta alumni to their profession and their community. Dr. Moore has made significant contributions to advancing our knowledge and treatment of bladder, kidney and prostate cancer. He has studied and developed laser treatment as therapy for prostate and bladder cancer, and developed new drugs to improve prostate cancer radiotherapy outcomes. Dr. Ron Moore has also actively mentored and trained hundreds of students throughout his career as well as serving on the APCaRI leadership committee.

The community is invited to celebrate as Dr. Ron Moore receives this top alumni award!
Date: Monday, Sept. 24, 2018
Location: Northern Alberta Jubilee Auditorium (11455 87 Ave), Edmonton, Alberta
Time: 7 p.m. ceremony with dessert reception to follow
Cost: Free, register for tickets
Dress: Business attire

For more information, please contact the Office of Alumni Relations at 780-492-3224, toll free 1-800-661-2593 or alumni@ualberta.ca
Featured at @UAlbertaAlumni and in the New Trail magazine.

- Perrin Beatty