title: Lingering fat signals with CHESS in simultaneous imaging of both hands can be improved with rice pads in both 1.5T and 3.0T.
abstract: OBJECTIVE
  To investigate whether rice pads can eliminate lingering fat signals of the complex surface shape of both hands that occur with chemical shift selective (CHESS) at 1.5T and 3.0T.
  
  
  METHODS
  T1-weighted images were obtained with CHESS using 1.5T and 3.0T systems. The same imaging parameters were used with and without rice pads on the coronal plane of both hands in 10 healthy volunteers. The fat-suppression effects were classified into four categories and scored for images, and visual evaluations were performed by one radiologist and one radiologic technologist.
  
  
  RESULTS
  At 1.5T, the mean evaluation score was 1.55 for images obtained without rice pads and 3.50 for images obtained with rice pads. At 3.0T, the mean evaluation score was 1.10 for images obtained without rice pads and 3.20 for images obtained with rice pads. With both systems, images obtained with the rice pads showed significantly better fat suppression effects than images obtained without rice pads (P<0.0001, P<0.0001).
  
  
  CONCLUSIONS
  It was confirmed that lingering fat signals are eliminated and good fat-suppressed images are obtained with the use of rice pads at 1.5T and 3.0T. Rice pads are therefore useful with at 1.5T and 3.0T, which are currently becoming more widely used.
authors.affiliation: Division of Health Sciences, Graduate School of Medical Science, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan. smoyari@yahoo.co.jp
authors.forename: Susumu
authors.initials: S
authors.lastname: Moriya
authors.forename: Yukio
authors.initials: Y
authors.lastname: Miki
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Kamishima
authors.forename: Tosiaki
authors.initials: T
authors.lastname: Miyati
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Kanagaki
authors.forename: Yukako
authors.initials: Y
authors.lastname: Matsuno
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Yokobayashi
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology*; D000328:Adult; D005260:Female; D006225:Hand / Q000033:anatomy & histology*; D064368:Healthy Volunteers; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007103:Immobilization / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008297:Male; D012275:Oryza; D056888:Patient Positioning / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique; D055815:Young Adult
keywords: CHESS; Fat suppression; Hand; MRI