CHIAO HUANG, KUO-JEN HSU, HAN-YUAN LIN, SHI-WEI CHU DEPARTMENT OF PHYSICS, NATIONAL TAIWAN UNIVERSITY, TAIWAN ABSTRACT Brain function stems from emergent properties of interconnected neuron networks, which requires in vivo volumetric imaging with high spatial/temporal resolution. Here, we introduce our recent technical developments for Drosophila brain imaging. INTRODUCTION The brain is one of the most important organs in our body, but it is functionally the least understood