Quality assurance of I-125 seed permanent implant therapy using a self-color developing reflection-type dosimetry sheet film.
OBJECTIVE
We evaluated a self-color developing sheet-type film for the detection of dead seeds in I-125 permanent implant therapy for prostate cancer.


METHODS
As a preliminary study, we irradiated X-rays to a self-developing reflection-type sheet film and created a relational curve between absorbed dose and film density. I-125 seeds were placed on a film and the approximate absorbed dose of I-125 was calculated from the relational curve of X-rays. A cartridge in which a dead seed was loaded among 10 I-125 seeds was placed on the film and the detectability of the dead seed was evaluated.


RESULTS
Using the relational curve of X-rays, it was possible to measure the approximate absorbed dose of I-125 seeds and to easily detect a dead seed at a glance. Using sterilized film, it was possible to detect a dead seed.


CONCLUSIONS
The self-developing film method is feasible for the detection of a dead seed in a cartridge without re-sterilization of seeds.
Department of Radiology, The University of Tokushima, Japan.
Shunsuke
S
Furutani
Hitoshi
H
Ikushima
Kyosuke
K
Ozaki
Masataka
M
Oita
Motoharu
M
Sasaki
Yoshihiro
Y
Takegawa
Hiromu
H
Nishitani
D001918:Brachytherapy / Q000295:instrumentation*; D006801:Humans; D007457:Iodine Radioisotopes / Q000627:therapeutic use*; D008297:Male; D011471:Prostatic Neoplasms / Q000532:radiotherapy*; D019736:Prostheses and Implants; D011785:Quality Assurance, Health Care; D014962:X-Ray Film
D007457:Iodine Radioisotopes