title: A new reference point for patient dose estimation in neurovascular interventional radiology.
abstract: In interventional radiology, dose estimation using the interventional reference point (IRP) is a practical method for obtaining the real-time skin dose of a patient. However, the IRP is defined in terms of adult cardiovascular radiology and is not suitable for dosimetry of the head. In the present study, we defined a new reference point (neuro-IRP) for neuro-interventional procedures. The neuro-IRP was located on the central ray of the X-ray beam, 9 cm from the isocenter, toward the focal spot. To verify whether the neuro-IRP was accurate in dose estimation, we compared calculated doses at the neuro-IRP and actual measured doses at the surface of the head phantom for various directions of the X-ray projection. The resulting calculated doses were fairly consistent with actual measured doses, with the error in this estimation within approximately 15%. These data suggest that dose estimation using the neuro-IRP for the head is valid.
authors.affiliation: Department of Radiology, Chiba Cardiovascular Center, 575 Tsurumai, Ichihara, Chiba 290-0512, Japan. k.kwsk23@pref.chiba.lg.jp
authors.forename: Kohei
authors.initials: K
authors.lastname: Kawasaki
authors.forename: Masaharu
authors.initials: M
authors.lastname: Imazeki
authors.forename: Ryota
authors.initials: R
authors.lastname: Hasegawa
authors.forename: Shinichi
authors.initials: S
authors.lastname: Shiba
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Takahashi
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Sato
authors.forename: Jyoji
authors.initials: J
authors.lastname: Ota
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Suzuki
authors.forename: Kazuo
authors.initials: K
authors.lastname: Awai
authors.forename: Hajime
authors.initials: H
authors.lastname: Sakamoto
authors.forename: Osamu
authors.initials: O
authors.lastname: Tajima
authors.forename: Atsuko
authors.initials: A
authors.lastname: Tsukamoto
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Kikuchi
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kageyama
authors.forename: Kyoichi
authors.initials: K
authors.lastname: Kato
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002560:Cerebrovascular Circulation; D005260:Female; D006257:Head / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011829:Radiation Dosage; D011834:Radiation Monitoring; D015642:Radiology, Interventional / Q000592:standards*; D012015:Reference Standards; D017751:Safety Management; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult