A COMMENTARY ON IN-VIVO LEAD X-RAY-FLUORESCENCE WITH REFERENCE TO THE1992 WORKSHOP

One of the main purposes of this Commentary is to respond to some of t he issues raised in a Summary by Todd et al. (1993) of the 1992 Worksh op sponsored by the National Institute of Environmental Health Science s on X-Ray Fluorescence (XRF), as it contains apparently undocumented claims for K-Line XRF (KXRF) techniques and understates the efficacy a nd clinical research results of the L-Line XRF (LXRF) technique (Rosen et al., 1989; Rosen et al., 1991). This Commentary presents a point o f view concerning the Workshop that is different in several respects f rom that published by Todd, Landrigan and Bloch (Todd et al., 1993). A s two of the three co-developers of the L-Line XRF (LXRF) technique, w e wish to draw the following information to the attention of readers o f Neurotoxicology, some of which was published before the Workshop too k place and some of which has been published subsequently (Rosen et al ., 1993; Rosen and Markowitz, 1993; Markowitz et al., 1993).