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Updated: Jan 2, 2026

Ex Vivo Imaging of Cell-specific Calcium Signaling at the Tripartite Synapse of the Mouse Diaphragm
Published on: October 4, 2018
A 512-Pixel, 51-kHz-Frame-Rate, Dual-Shank, Lens-less, Filter-less Single Photon Avalanche Diode CMOS Neural Imaging
Jaebin Choi1, Adriaan J Taal1, Eric H Pollmann1
1Electrical Engineering Department, Columbia University, New York, NY, USA.
Abstract:
We present an implantable single photon shank-based imager, monolithically integrated onto a single CMOS IC. The imager comprises of 512 single photon avalanche diodes distributed along two shanks, with a 6-bit depth in-pixel memory and an on-chip digital-to-time converter. To scale down the system to a minimally invasive form factor, we substitute optical filtering and focusing elements with a time-gated, angle-sensitive detection system. The imager computationally reconstructs the position of fluorescent sources within a three-dimensional volume of 3.4 mm × 600 µm × 400 µm.
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