title: [A simple method for evaluation of the stability of magnetic resonance scanner during brain function imaging].
abstract: OBJECTIVE
  To develop a simple method for evaluating the stability of magnetic resonance (MR) scanner during brain function imaging.
  
  
  METHODS
  A symmetrical water phantom was scanned using the same sequence and parameters as for brain function imaging. The stability of MR scanner was evaluated in view of the signal levels of phantom images.
  
  
  RESULTS
  The quality control chart of the mean value, standard deviation and the range of the signal level in the region of interest (ROI) within the same region on 128 phantom images were obtained, demonstrating the state of stability of the MR scanner.
  
  
  CONCLUSIONS
  The quality control chart of ROI can be used to evaluate the stability of the MR scanner.
authors.affiliation: Department of Medical Instrumentation, First Military Medical University, Guangzhou 510515 China. fxg@fimmu.com
authors.forename: Xi-gang
authors.initials: XG
authors.lastname: Feng
authors.forename: Zhi-bo
authors.initials: ZB
authors.lastname: Wen
authors.forename: Fan-heng
authors.initials: FH
authors.lastname: Huang
authors.forename: Yi-quan
authors.initials: YQ
authors.lastname: Lin
mesh_terms: D001921:Brain / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D011786:Quality Control