title: Estimation of activity of administered18F-fluorodeoxyglucose by measurement of the dose equivalent rate on the right temporal region of the head.
abstract: BACKGROUND
  Positron emission tomography (PET) with18F-fluorodeoxyglucose (FDG) is now a routine procedure for the management of cancer patients. Intravenous administration of FDG is sometimes halted due to troubles. In such cases, estimations of the FDG dosage injected prior to halting administration may be helpful. We have established a method of estimating the activity of FDG to patients on the basis of the dose equivalent rate on the surface of the right temporal region of the head. The correlation of actual administered dosage with independent variables, such as the dose equivalent rate on the right temporal region of the head, age, sex, and body weight, was analyzed using multiple regression analysis to obtain linear, quadratic, and cubic regression equations.
  
  
  RESULTS
  When entering independent variables, the cubic regression equation could be used to estimate an administered dosage with an accuracy of ±10 % for 62 % of all patients and ±20 % for 90 % of all patients.
  
  
  CONCLUSIONS
  We conclude that this method is useful for estimating the administered dosage from the dose equivalent rate on the temporal region of the head.
authors.affiliation: Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Faculty of Medicine, Kindai University, 377-2 Ohno-Higashi, Osaka-Sayama, 589-8511, Osaka, Japan.
authors.forename: Kenta
authors.initials: K
authors.lastname: Sakaguchi
authors.affiliation: Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Faculty of Medicine, Kindai University, 377-2 Ohno-Higashi, Osaka-Sayama, 589-8511, Osaka, Japan. hosono@med.kindai.ac.jp.|Department of Radiology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan. hosono@med.kindai.ac.jp.
authors.forename: Makoto
authors.initials: M
authors.lastname: Hosono
authors.affiliation: Division of Nursing, Kindai University Hospital, Osaka-Sayama, Japan.
authors.forename: Tomomi
authors.initials: T
authors.lastname: Imamura
authors.affiliation: Division of Nursing, Kindai University Hospital, Osaka-Sayama, Japan.
authors.forename: Naomi
authors.initials: N
authors.lastname: Takahara
authors.affiliation: Division of Nursing, Kindai University Hospital, Osaka-Sayama, Japan.
authors.forename: Misa
authors.initials: M
authors.lastname: Hayashi
authors.affiliation: Division of Nursing, Kindai University Hospital, Osaka-Sayama, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Yakushiji
authors.affiliation: Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Faculty of Medicine, Kindai University, 377-2 Ohno-Higashi, Osaka-Sayama, 589-8511, Osaka, Japan.|Department of Radiology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Ishii
authors.affiliation: Department of Radiology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan.
authors.forename: Tatsuro
authors.initials: T
authors.lastname: Uto
authors.affiliation: Division of Positron Emission Tomography, Institute of Advanced Clinical Medicine, Faculty of Medicine, Kindai University, 377-2 Ohno-Higashi, Osaka-Sayama, 589-8511, Osaka, Japan.|Department of Radiology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan.
authors.forename: Takamichi
authors.initials: T
authors.lastname: Murakami