市販硝子体内蛍光光度計（3機種）の評価

Comparison and evaluation of commercially available three models fluorophotometers

　1983年6月末現在で，国内で，vitreous fluorophotometryの目的で使用されている螢光光度計3機種（Fluorotron Master, Fluoromet, Gamma-Inami）について，その検量限界，精度，Tailing effectについて比較検討した。検量限界は市販の状態では，　FluorotronMasterがもっともすぐれていたが，光電子増倍管を電子冷却素子により冷却したGamma—Inamiでは，10倍以上のS／Nの改善がみられた。

　Tailing effectは，　Fluorotron MasterとGamma-Inamiでは，優劣がつけられないが，Fluorometは約2倍の範囲にTailingがみられた。

The lower limit of detection (in vitro), sensiti-vity ratio (s/n), and so-called tailing effect, which may be major artifactorial factor caused by pseudo-fluorescence and intraocular focal diamond con-sisting of exciting and emitting beams, was evalu-ated with three models of commercially available vitreous fluorophotometers (Gamma-Inami, Fluoro-tron Master, Fluoromet). Three models had suffi-cient ability to detect subtle intraocular fluorescen-ce, and further minor modifications such as photo-multiplier cooling improved s/n remarkably.

We found the tailing effect was wider in Fluoro-met than other two apparatuses.