Denny L Lee

Title: Innovations by Denny L Lee in X-ray Imaging Technology

Introduction: Denny L Lee, based in West Chester, PA, is a prominent inventor with an impressive portfolio that includes 24 patents. His groundbreaking work has significantly advanced the field of X-ray imaging, leading to improved technologies that enhance diagnostic capabilities in medical settings.

Latest Patents: Among his latest innovations, Lee has developed two notable patents:

1. **Direct Conversion X-ray Imaging Device with Strip Electrodes** - This invention features a flat panel X-ray imager that utilizes an amorphous selenium detector. It incorporates a dielectric layer within the X-ray conversion layer to create an interface with the high voltage bias electrode. The design addresses the issue of trapped counter charges at the dielectric/selenium layer by employing a series of strip electrodes, which are electrically connected in groups. During the X-ray exposure phase, a high bias voltage is applied to these strip electrodes. After exposure, the groups are selectively energized to drive trapped charges towards designated 'gutter' strip electrodes. The innovation includes a second embodiment where discrete electrodes are sandwiched between the dielectric layer and the selenium layer, providing enhanced electric field uniformity during imaging.

2. **Flat Panel X-ray Imager with a Grid Structure** - This invention proposes a flat panel X-ray imager that also employs an amorphous selenium detector. It features a polymer grid structure that forms a crucial interface between the X-ray conversion layer and the pixel electrodes. This grid acts as a physical barrier that mitigates electrical bridging caused by the crystallization of amorphous selenium, especially during temperature fluctuations. Additionally, the design improves thermal stability of the pixel electrodes and can enhance avalanche gain in the conversion layer while minimizing dark current.

Career Highlights: Denny L Lee has spent a significant portion of his career at notable companies, such as E.I. du Pont de Nemours and Company and Sterling Diagnostic Imaging, Inc. His contributions to these organizations have been vital in advancing imaging technologies and addressing challenges within the industry.

Collaborations: Throughout his career, Lee has collaborated with esteemed colleagues, including Lothar S. Jeromin and Lawrence K. Cheung. Their combined efforts have fostered innovative solutions in the field of X-ray imaging.

Conclusion: Denny L Lee's contributions to diagnostic imaging through his patents have marked significant advancements in the industry. His innovative approaches, particularly in X-ray imaging technologies, continue to influence the direction of medical imaging, highlighting the importance of continuous research and development in this essential field.