Emotion sensing using physiological signals in real-life situations can be practically valuable. Previous studies have developed wearable devices that record autonomic nervous system activity, which reflects emotional arousal. However, no study determined whether emotional valence can be assessed using wearable devices. To this end, we developed a wearable device to record facial electromyography (EMG) from the corrugator supercilii (CS) and zygomatic major (ZM) muscles. To validate the device, in Experiment 1, we used a traditional wired device and our wearable device, to record participants’ facial EMG while they were viewing emotional films. Participants viewed the films again and continuously rated their recalled subjective valence during the first viewing. The facial EMG signals recorded using both wired and wearable devices showed that CS and ZM activities were, respectively, negatively and positively correlated with continuous valence ratings. In Experiment 2, we used the wearable device to record participants’ facial EMG while they were playing Wii Bowling games and assessed their cued-recall continuous valence ratings. CS and ZM activities were correlated negatively and positively, respectively, with continuous valence ratings. These data suggest the possibility that facial EMG signals recorded by a wearable device can be used to assess subjective emotional valence in future naturalistic studies.

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Fig. 3. Gantry design of the C-shaped breast PET scanner. Fig. 2. Schematic of the C-shaped detector ring. ' :l ,t .;.~f;;:i 1 Fig. 1. Schematic of the C-shaped and full ring breast PET scanner. II. SYSTEM DESCRIPTION A. Scanner ConfigurationFig. 2 shows the schematic of the C-shaped breast PET scanner. The scanner consists of 24 detector modules arranged in a 2-ring configuration with a radius of 228 nun and an axial extent of 104 mm. The transaxial FOY is 200 mm. As shown in Fig. 3, the subject will be in a comfortable sitting position where the body is leaning over the scanner. This positioning can be kept without a pain for the subject and the breast movement by breathing can be reduced. ensuring inclusion of the entire breast into the effective field of view (FOY).

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We previously proposed t "FlexiblePET", a dual-head mobile DOI-TOF P scans the patient lying on a bed equip imaging/therapy device. Following the develo prototype with dual-head SiPM-based detectors of-concept for MR compatibility, we are now de prototype with DOI-TOF detectors and acquisition system. Each detector module consis array (2.9 mm × 2.9 mm × 20 mm LGSO in a light guide and a 4 × 4 4-ch SiPM array. The de layer DOI capability by a special reflector ar expected to have < 500 ps coincidence timin scanner has two arced detector heads (central diameter: 778 mm), and each consists of 18 de transaxial direction and 3 rings in axial directio configuration provides 715 mm transaxial FO axial FOV. The detector head arrangement i four types: Top-Bottom, Left-Right, Side depending on imaging purpose. In addition imaging is possible by moving detector heads cl To compensate image quality degradation caus angle coincidence measurement, which is inher head scanning, a new regularized TOF list-mo algorithm that combines weighted maxi estimation and projection-space regulariz developed. In this study, we will report initial r performance evaluations of the prototype Fle according to the NEMA NU 2-2007 standards. results support that the developed dual-head protoptype system has the MR-compatibility a image quality from the incomplete TOF project