This study compares the ability of a new design of brachytherapy seed for prostate seed implants for treatment of prostate cancer to maintain their intended position in the prostate after being deposited. Standard seeds, especially in apical locations, have a tendency to migrate distally in response to muscular forces. AnchorSeeds have a textured coating which is designed to prevent migration. 40 patients who are eligible and suitable for prostate brachytherapy will be randomly assigned to receive either standard seeds or AnchorSeeds.
Standard post implant prostate brachytherapy quality assurance at the Center for the Southern Interior is usually performed at one month after the procedure with CT and MR imaging. In order to test the ability of the new design of prostate brachytherapy seeds (AnchorSeeds) to hold their position in the prostate, 40 men who have been randomly assigned to receive either standard seeds or AnchorSeeds will have an additional CT scan immediately after the procedure to record seed position for comparison to positions one month later. The magnitude and frequency of seed displacement will be determined.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
41
radioactivity 0.4 U per seed, prescribed dose 144 Gy
activity 0.4 U per seed, prescribed dose 144 Gy
Cancer Center for the Southern Interior
Kelowna, British Columbia, Canada
seed displacement
CT scan of the prostate immediately after the implant will be used to determine the center of mass of the implant as a reference for distal migration of apical seeds and compared to positions on the CT scan one month following the implant
Time frame: one month
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