title: Head movement in normal subjects during simulated brain imaging.
abstract: OBJECTIVE
  Videotape images of 30 volunteers were used to classify and measure head movements that may occur during brain imaging.
  
  
  METHODS
  A simple videotape setup was designed to record simultaneously the lateral and vertex views of the subject's head. Volunteer subjects were positioned for brain imaging and their heads were videotaped for 2 hr. Head movement was identified and measured.
  
  
  RESULTS
  All subjects demonstrated angular movement within the transaxial plane (rotation of the head). There was angular movement in the sagittal plane and translation of the transaxial plane. There was no movement of the coronal plane, nor was there any translational movement of the sagittal plane.
  
  
  CONCLUSIONS
  The most dominant head movement was rotation. The effects of other factors such as height, weight, age, smoking habits, and caffeine and alcohol intake could not be determined with this sample size.
authors.affiliation: Department of Medical Radiations Science, Royal Melbourne Institute of Technology, Australia.
authors.forename: H
authors.initials: H
authors.lastname: Patterson
authors.forename: G H
authors.initials: GH
authors.lastname: Clarke
authors.forename: R
authors.initials: R
authors.lastname: Guy
authors.forename: W J
authors.initials: WJ
authors.lastname: McKay
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging*; D005260:Female; D019788:Fluorodeoxyglucose F18; D019416:Head Movements / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D019275:Radiopharmaceuticals; D012399:Rotation; D014055:Tomography, Emission-Computed; D015899:Tomography, Emission-Computed, Single-Photon; D014743:Videotape Recording
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18