Energy Resources International Co., Ltd. (ERI), a pioneer in X-ray radiography, has stepped into medical equipment field and has dedicated to its effort to explore and master the properties and application of Carbon Nanotube (CNT) technology since 2013. The first area of focus has been in the development of world’s first CNT-driven Cold Cathode as the X-ray emission source. ERI has applied this technological breakthrough first to the development of the battery-powered handheld X-ray devices. These handheld devices not only drastically change the experience of the dental patients but also lower the operating costs of the dentist offices. From the handheld devices, ERI proceeds to explore opportunities in the portable general purpose X-ray systems for extremities with the vision to continuously improve the timeliness, convenience, and effectiveness of the X-ray experiences. In addition to using and improving X-ray as a diagnostic tool, ERI has been exploring opportunities on the treatment side of the healthcare needs. The most recent conversation on the treatment side surrounds the ground-breaking Intraoperative Radiotherapy (IORT) for breast and skin cancer therapy.