Quality assurance of I-125 seed permanent implant therapy using a self-color developing reflection-type dosimetry sheet film

Shunsuke Furutani, Hitoshi Ikushima, Kyosuke Ozaki, Masataka Oita, Motoharu Sasaki, Yoshihiro Takegawa, Hiromu Nishitani

Research output: Contribution to journalArticle

1 Citation (Scopus)


Purpose: We evaluated a self-color developing sheet-type film for the detection of dead seeds in I-125 permanent implant therapy for prostate cancer. Materials and 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 1-125 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. Conclusion: The self-developing film method is feasible for the detection of a dead seed in a cartridge without re-sterilization of seeds.

Original languageEnglish
Pages (from-to)474-477
Number of pages4
JournalRadiation Medicine - Medical Imaging and Radiation Oncology
Issue number7
Publication statusPublished - Nov 2005
Externally publishedYes



  • Dead seed
  • I-125 seed
  • Quality assurance

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiation

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