title: Preprocedural MR imaging for percutaneous vertebroplasty: special interest in contrast enhancement.
abstract: OBJECTIVE
  The success of percutaneous vertebroplasty (PVP) depends greatly on preprocedural evaluation of the patients. The purpose of this study was to evaluate the efficacy of preprocedural magnetic resonance imaging (MRI) for the indications of PVP.
  
  
  METHODS
  A retrospective review of 122 osteoporotic compression fractures in 63 patients who underwent preprocedural gadolinium-enhanced MRI and PVP was performed. Based on the extent of contrast enhancement on preprocedural MRI, each case was classified into one of two groups: group 1, which represented more than 50% of the vertebral body enhanced; and group 2, which represented less than 50% of the vertebral body enhanced. The most enhancing level was evaluated in multilevel PVP sessions. We evaluated the difference of pre- and postprocedural pain scales between groups 1 and 2 using Mann-Whitney's U-test.
  
  
  RESULTS
  There was a trend toward higher preoperative pain score in group 1, but it was not statistically significant (P = 0.0537). In addition, the postoperative pain score in group 2 was significantly higher than that in group 1 (P = 0.0007). The difference between the pre- and postoperative pain scores was significantly higher in group 1 than in group 2 (P = 0.0001).
  
  
  CONCLUSIONS
  Contrast enhancement on MRI indicates a painful lesion and extensive contrast enhancement predicts better pain relief after PVP.
authors: Department of Radiology, St. Luke's International Hospital, 9-1 Akashi-cho, Chuo-ku, Tokyo, 104-8560, Japan. akuemura@luke.or.jp
authors: Akihiro
authors: A
authors: Uemura
authors: Nobuo
authors: N
authors: Kobayashi
authors: Yuji
authors: Y
authors: Numaguchi
authors: Sokun
authors: S
authors: Fuwa
authors: Yukihisa
authors: Y
authors: Saida
mesh_terms: D000368:Aged; D003287:Contrast Media; D005260:Female; D050815:Fractures, Compression / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D010024:Osteoporosis / Q000150:complications; D010147:Pain Measurement; D010347:Patient Care Planning; D019904:Polymethyl Methacrylate / Q000627:therapeutic use; D012189:Retrospective Studies; D016103:Spinal Fractures / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D018709:Statistics, Nonparametric
chemical_list: D003287:Contrast Media; D019904:Polymethyl Methacrylate; D019786:Gadolinium DTPA
references: Radiat Med. 1998 Sep-Oct;16(5):329-34
references: 9862153
references: Radiology. 2002 Aug;224(2):320-2
references: 12147821
references: J Neurosurg. 2004 Jan;100(1 Suppl Spine):24-31
references: 14748570
references: AJNR Am J Neuroradiol. 2004 Feb;25(2):175-80
references: 14970015
references: AJNR Am J Neuroradiol. 2006 Aug;27(7):1579-85
references: 16908585
references: Top Magn Reson Imaging. 2000 Aug;11(4):235-44
references: 11133065
references: Spine (Phila Pa 1976). 2005 Jan 1;30(1):87-92
references: 15626987
references: Radiographics. 2003 Jan-Feb;23(1):179-87
references: 12533652
references: Radiology. 1992 Feb;182(2):445-50
references: 1732963
references: AJNR Am J Neuroradiol. 2002 Nov-Dec;23 (10 ):1642-6
references: 12427615
references: Radiology. 2002 Aug;224(2):463-9
references: 12147843
references: AJNR Am J Neuroradiol. 2000 Nov-Dec;21(10 ):1807-12
references: 11110531
references: Radiology. 2006 Apr;239(1):195-200
references: 16493017
references: J Vasc Interv Radiol. 2003 Jun;14 (6):683-96
references: 12817036