CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 8313 > Article
Paper
3 March 2012 Optimization of high resolution collimator with CdTe detector: a simulation study
Young-Jin Lee, Hee-Joung Kim, Hyun-Ju Ryu, Hyo-Min Cho, Seung-Wan Lee, Yu-Na Choi
Author Affiliations +
Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 831365 (2012) https://doi.org/10.1117/12.910846
Event: SPIE Medical Imaging, 2012, San Diego, California, United States
Abstract
Photon counting detectors using cadmium telluride (CdTe) or cadmium zinc telluride (CZT) have benefits compared to conventional scintillation detectors. Recently, many studies have been conducted using these materials to improve the sensitivity and spatial resolution of photon counting detectors. The purpose of this study was to optimize the design of a collimator to achieve excellent resolution and high sensitivity on the gamma camera system based on the CdTe detector. We performed a simulation study of the PID 350 (Ajat Oy Ltd., Finland) CdTe detector using the Geant4 Application for Tomographic Emission (GATE) simulation. This detector consists of small pixels (0.35 × 0.35 mm2). We designed two parallel-hole collimators with different shapes and verified their usefulness. One was the proposed pixelated parallel-hole collimator in which the hole size and pixel size are the same, and the other was the hexagonal parallel-hole collimator, which has a hole size similar to that of the pixelated parallel-hole collimator. We evaluated the sensitivity, spatial resolution, and contrast resolution to determine which parallel-hole collimator was best on the PID 350 CdTe detector. The sensitivity was 22.65% higher for the pixelated parallel-hole collimator than for the hexagonal parallel-hole collimator. Also, the pixelated parallel-hole collimator provided 10.7% better spatial resolution than the hexagonal parallel-hole collimator and contrast resolution was improved by 8.93%. In conclusion, we successfully established a high resolution gamma camera system with a pixelated parallel-hole collimator.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Young-Jin Lee, Hee-Joung Kim, Hyun-Ju Ryu, Hyo-Min Cho, Seung-Wan Lee, and Yu-Na Choi "Optimization of high resolution collimator with CdTe detector: a simulation study", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 831365 (3 March 2012); https://doi.org/10.1117/12.910846
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 8 PAGES
DOWNLOAD PAPER SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Collimators
Sensors
Spatial resolution
Image resolution
Imaging systems
Monte Carlo methods
Cameras
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top