Low-dose automated tomography has been implemented on a 400-kV JEOL in
termediate voltage electron microscope. Instrumentation and procedures
for automatic tomographic series data collection are described. Diffi
culties encountered and ways to overcome them are discussed. A low-dos
e tomographic projection series of a triad junction of frog sartorius
muscle was semiautomatically collected and a 3-D reconstruction of thi
s organelle was made. (C) 1997 Academic Press.