Respiration gated CT scanning for radiation treatment planning by guided respiration method

Yoshikazu Tsunashima, Takeji Sakae, Yoshiyuki Shioyama, Kenji Kagei, Toshiyuki Terunuma, Akihiro Nohtomi, Yasuyuki Akine

Research output: Contribution to journalArticlepeer-review


In Proton Medical Research Center (PMRC), we have performed the respiration-gated irradiation for treating the tumor in the body trunk. In the conventional method, patients must hold their expiration during CT scanning. The phase of holding expiration is different from the end-expiration phase. This results in difference of anatomical location in the body between CT scanning and the respiration-gated irradiation. For the sake of highly-accurate irradiation, a respiration gated CT scanning system is introduced. In case of natural respiration, it has been difficult to achieve the gated CT scanning because a stable period of end-expiratory is not so long as CT scanning time (1 second in our case). In this study, we developed a guided respiration method, which leads a patient to maintain the end-expiratory phase during required time. The respiration gated CT scanning is performed by using this. The phase of the acquired CT image can be approximated to that of respiration-gated irradiation.

Original languageEnglish
Pages (from-to)93-100
Number of pages8
JournalIgaku butsuri : Nihon Igaku Butsuri Gakkai kikanshi = Japanese journal of medical physics : an official journal of Japan Society of Medical Physics
Issue number1
Publication statusPublished - 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Medicine


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