IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, VOL. 12, NO. 5, OCTOBER 2018 965 Guest Editorial Special Issue on Selected Papers From IEEE BioCAS 2017 T HIS special issue of the IEEE TRANSACTIONS ON BIOMED- ICAL CIRCUITS AND SYSTEMS presents a selection of high quality research papers from the 2017 IEEE BIOMEDICAL CIR- CUITS AND SYSTEMS CONFERENCE (BioCAS), in Torino, Italy, from October 19–21, 2017. As in previous years, BioCAS 2017 was jointly sponsored by the IEEE Circuits and Systems (CAS) Society and the IEEE Engineering in Medicine and Biology (EMB) Society. At the crossroads of medicine, life sciences, physical sciences and engineering, exciting interdisciplinary re- search and development activities are taking place that shape tomorrow’s healthcare and well-being. The BioCAS conference serves as a premier international forum for these activities. Bio- CAS 2017 received a total of 306 papers from all over the world with a 9% increase compared to BioCAS 2016. The papers came from all over the world with a split of about 27% from Asia, 43% from Europe, 20% from North America, and the rest from other parts of the world. Out of these, only 207 top papers were accepted after a thorough review process, resulting in an accep- tance rate of 68%. The papers in this special issue were selected out of the total of 207 accepted papers based on technical review scores from independent experts worldwide who reviewed these papers for the conference program. Multiple rounds of peer re- view in the transactions resulted in the following 13 papers for this special issue, which correspond indeed to the top-6% of the best presented at the conference. The papers cover several topics and can be combined in 4 broad categories, as per the follow: 1) Biomedical Imaging and Signal Processing: Novel imaging and signal processing approaches along with proto-types: a) Towards Ultrasound Everywhere: A Portable 3D Digital Back-End Capable of Zone and Compound Imaging by A. Ibrahim et al. b) Real-Time Event-Driven Classification Technique for Early Detection and Prevention of Myocardial Infarction on Wearable Systems by D. Sopic et al. c) Adaptive Image Enhancement Based on Guide Im- age and Fraction-Power Transformation for Wire- less Capsule Endoscopy by M. Long et al. 2) Bio-Inspired and Neuromorphic Circuits and Systems: Microelectronic circuitry that emulates the function and Digital Object Identifier 10.1109/TBCAS.2018.2873068 structure of biological neural systems for a better under- standing of the brain function and development of intelli- gent sensory and computational systems: a) Analysis and Simulation of Capacitor-Less ReRAM- Based Stochastic Neurons for the in-Memory Spik- ing Neural Network by J. Lin and J.-S. Yuan. b) Parallel Distribution of an Inner Hair Cell and Au- ditory Nerve Model for Real-Time Application by R. James et al. c) A Mixed-Signal Structured AdEx Neuron for Accel- erated Neuromorphic Cores by S. A. Aamir et al. 3) Biosensors and Imagers: Combining nanotechnology, MEMS, integrated and programmable electronics to al- low for innovative bio-sensing techniques and leading to new applications in clinical research and healthcare: a) CMOS Luminescence Imager With Ambient Light Compensation and Lifetime to Frequency Conver- sion by G. Fu and S. Sonkusale. b) Heterogeneous Integration of CMOS Sensors and Fluidic Networks Using Wafer-Level Molding by M. Lindsay et al. c) An IoT Solution for Online Monitoring of Anesthet- ics in Human Serum Based on an Integrated Fluidic Bioelectronic System by F. Stradolini et al. 4) Implantable Electronics and Neural Implants: Micro- electronic circuits for acquiring, conditioning, and pro- cessing physiological signals as well as for data transmis- sion and remote powering of implanted medical devices: a) A High-Resolution Opto-Electrophysiology System With a Miniature Integrated Headstage by A. E. Mendrela et al. b) Implantable Wireless Intracranial Pressure Moni- toring Based on Air Pressure Sensing by H. Jiang et al. c) Chip-Scale Coils for Millimeter-Sized Bio-Implants by P. Feng et al. d) End-to-End Design of Efficient Ultrasonic Power Links for Scaling Towards Sub-Millimeter Im- plantable Receivers by T. C. Chang et al. The guest editors would like to thank the BioCAS 2017 and Technical Program Committee members for soliciting and se- lecting high-quality papers in the symposium and our colleagues that helped us in the review process of the selected papers. We also owe our deepest gratitude to Dr. Mohamad Sawan 1932-4545 © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications standards/publications/rights/index.html for more information.