Location History:
- Shizuoka, JP (1989 - 1991)
- Hamamatsu, JP (1994)
Company Filing History:
2 out of 134 
2 out of 2,945 
1 out of 256 Years Active: 1989-1994
Title: Keiji Shimizu: Innovator in Positron Computed Tomography
Introduction
Keiji Shimizu is a notable inventor based in Shizuoka, Japan. He has made significant contributions to the field of medical imaging, particularly in positron computed tomography. With a total of 4 patents to his name, Shimizu's work has advanced the technology used in diagnostic imaging.
Latest Patents
Shimizu's latest patents include a positron computed tomography scanner. This innovative scanner features a plurality of detectors arranged in a generally cylindrical multi-layer of rings. It also includes slice septa that restrict the visual fields of the detectors, ensuring that the visual fields intersect a set axis. The interval of the slice septa corresponds to a plural number of detector cells, which can determine the positions of gamma rays incident in the direction of the set axis. Notably, the slice septa are movable relative to the detector cells during gamma ray counting operations. Another significant patent is a data correcting device for use with computed tomography apparatus. This device is designed to obtain a tomographic image with a subject holding means that can slide into or out of the tunnel in a gantry. It includes a body movement sensor, a body movement data processing unit, a tomographic data processing unit, an address converting unit, and a memory for data storage.
Career Highlights
Throughout his career, Shimizu has worked with prominent companies such as Hamamatsu Photonics and Hamamatsu Photonics K.K. His experience in these organizations has allowed him to develop and refine his innovative ideas in medical imaging technology.
Collaborations
Shimizu has collaborated with notable individuals in his field, including Takaji Yamashita and Hiroshi Uchida. These collaborations have contributed to the advancement of his inventions and the overall progress in the field of computed tomography.
Conclusion
Keiji Shimizu's contributions to positron computed tomography have significantly impacted medical imaging technology. His innovative patents and collaborations highlight his dedication to advancing this critical field.