title: [Usefulness of imaging method without using lead plate for sentinel lymph node scintigraphy].
abstract: OBJECTIVE
  In scintigraphy of the sentinel lymph node, it is common to use a lead plate as a shield to reduce star artifact and scattered radiation in the portion surrounding the injected site of radioactive colloid. We have developed an imaging method without using a lead plate, and examined its usefulness in phantom and clinical imagings.
  
  
  RESULTS
  Star artifact was eliminated using a medium energy collimator. Effects of scattered radiation from the injection site were reduced by setting energy window at higher level.
  
  
  CONCLUSIONS
  Our method without using a lead plate can be applied to dynamic data acquisition and imaging of a portion where it is difficult to place a lead plate. It also seems to be a useful imaging method in that it takes patients' feelings into consideration.
authors.affiliation: Department of Radiology, Osaka City University Hospital.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tsushima
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamanaga
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Shimonishi
authors.forename: Hironobu
authors.initials: H
authors.lastname: Ochi
mesh_terms: D016477:Artifacts; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D008198:Lymph Nodes / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging / Q000379:methods*; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity