[Usefulness of imaging method without using lead plate for sentinel lymph node scintigraphy].
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.
Tsushima
Hiroyuki
H
Department of Radiology, Osaka City University Hospital.
Yamanaga
Takashi
T
Shimonishi
Yoshihiro
Y
Ochi
Hironobu
H
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