NetForum uses cookies to ensure that we give you the best experience on our website. If you continue to use the site, we'll assume that you are happy to receive these cookies on the NetForum website. Read about our cookies.
NetForum Community
Learn. Share. Optimize.
Log in | Sign up now | Submit content | Contact
Go to similar content

Back-Illuminated Photodiode (BIP)

White Paper
Philips CT Marketing Philips Healthcare

Ready for 40 slices and beyond

The number of slices that can be achieved in multislice CT is limited by conventional 2-D photodiodes. Limitations arise due to the number of wirebonds that transmit data between the photodiode elements and the detector electronics. The wirebond density at the edge of a conventional photodiode makes it a challenge to construct a CT detector capable of more than 32 channels.


Taking these limitations into consideration, Philips has designed a Back Illuminated Photodiode (BIP) that removes the bottlenecks caused by conventional photodiodes. BIP eliminates the need for wirebonds to link the photodiode to the electronics.


Instead, a conductive epoxy is used between the photodiode and the substrate - data is passed through the substrate to the electronics. In effect, BIP eliminates the slice limit, making Brilliance CT ready for 40 slices and beyond.


The BIP is easily tiled in two dimensions, allowing for hundreds of slices. With this, we are no longer limited in the number of slices or the volume of coverage afforded by the photodiode. This aspect of the technology allows it to be ready for truly large area CT detection systems.

 Conventional detector technology Philips' patented BIP
Conventional detector technology
Philips' patented BIP

Benefits of BIP technology

Back Illuminated Photodiode technology improves dose efficiency results from shorter signal paths:

  •  Better signal integrity and higher signal-to-noise ratio
  •  Geometric efficiency - no traces on top of silicon


The slice limit is no longer an issue:

  •  No wirebond bottleneck
  •  Tileable detectors allow for hundreds of slices
  •  Solves flat panel challenge with conventional detector materials


This content has been made possible by NetForum Community.
Share this on: Share your link in twitter Share your link in facebook Share your link on LinkedIn Print Rate this article: Log in to vote

Jul 29, 2005

Rate this:
Log in to vote

White Paper
Brilliance 40-channel, Brilliance 64-channel
Brilliance Version 1.2, dose

Clinical News
Best Practices
Case Studies
Publications and Abstracts
White Papers
Web seminars and Presentations
Application Tips and FAQ
Try an Application
Business News
Case Studies
White Papers
Web Seminars and Presentations
Utilization Services
Contributing Professionals
Contributing Institutions
Become a Contributor