Feasibility of Using SPECT/CT Imaging to Map Lymphatic Drainage Patterns in Prostate Cancer Patients
The purpose of this study is to develop a practice procedure for lymphatic drainage mapping with the intent of providing a new tool that could potentially be used for radiation treatment planning. High-risk prostate cancer patients who are scheduled to be treated with intensity-modulated radiotherapy (IMRT) may be eligible to enroll in this study. 99mTc-sulfur nanocolloid, a radiopharmaceutical ("tracer") will be injected by a urologist using transrectal ultrasound guidance (TRUS)at the UCSF Urology Clinic. Participants will then undergo SPECT/CT imaging at the UCSF Nuclear Medicine Clinic. This study will evaluate the feasibility of transporting patients to the Nuclear Medicine Clinic for imaging within 1-3 hours after administration of 99mTc-sulfur nanocolloid.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||Practice Procedure for 99mTc-Sulfur Nanocolloid Lymphatic Drainage Mapping in Prostate Cancer Using SPECT-CT (Single Photon Emission Computed Tomography / Computed Tomography)|
- Percentage of Participants Successfully Completed 99mTc-sulfur Nanocolloid SPECT/CT Within 3 Hours After Injection [ Time Frame: 1 day ] [ Designated as safety issue: No ]Successful completion of 99mTc-sulfur nanocolloid SPECT/CT means that the images were obtained within 3 hours, and the images showed patients' lymphatic drainage.
- Percentage of Images With Detectable Sentinel Lymph Nodes (LNs) From 99mTc-sulfur Nanocolloid SPECT/CT Scans [ Time Frame: 1 day ] [ Designated as safety issue: No ]There was only one arm for this study. All participants who had prostate cancer received 99mTc-sulfur nanocolloid injection and imaged by SPECT/CT within 3 hours of injection. The imaging studies qualitatively detected radiotracer distribution within the prostate and local lymphatic system. The detection of the radiotracer distribution was performed by experienced attending nuclear medicine physicians at UCSF. The qualitative detection includes visual lymph node uptake seen by SPECT scans overlaid on coregistered CT scans.
|Study Start Date:||November 2009|
|Study Completion Date:||December 2010|
|Primary Completion Date:||December 2010 (Final data collection date for primary outcome measure)|
Other: SPECT-CT imaging
The entire study procedure involves 1) preparation of 99mTc-sulfur nanocolloid, 2) administration of 99mTc-sulfur nanocolloid with transrectal ultrasound guidance, 3) transfer of the patient to the Nuclear Medicine clinic for SPECT/CT (Infinia Hawkeye, GE Healthcare) imaging, and 4) tomographically capturing distributions of 99mTc-sulfur nanocolloid uptake in the patient's lymphatic drainage sites within a practical image acquisition time (1-3 h postinjection) considering the patient transit time between injection and imaging.
Administration of 99mTc-sulfur nanocolloid will be performed at the UCSF Urology clinic. The injection will be performed following the clinically accepted method that has been described by European investigators. 99mTc-sulfur nanocolloid imaging utilizes trace amounts of radioactivity. 100-200 MBq (2.7-5.4 mCi) of 99mTc-sulfur nanocolloid will be administered into two lobes of the prostate gland under transrectal ultrasound guidance with three fractions each into peripheral and central zone of the prostatic apex, mid portion, and base. 1% Lidocaine may be administered for local anesthesia per routine clinical protocol as deemed appropriate by the performing urologist.
The procedure will be considered feasible if the practice procedure (from injection to completion of imaging) is successfully implemented within 3 hours of injection (including patient transport time). Imaging will be considered successful if radiotracer is qualitatively detected within the prostate and local lymphatic system.
|United States, California|
|UCSF Helen Diller Family Comprehensive Cancer Center|
|San Francisco, California, United States, 94115|
|Principal Investigator:||Youngho Seo, PhD||University of California, San Francisco|