Optimization using detective quantum efficiency (DQE) of the high-resolution parallel-hole collimators
with CdTe pixelated semiconductor SPECT system

Young-Jin Lee; Dae-Hong Kim; Ye-seul Kim; Hee-Joung Kim

doi:10.1117/12.2043006

19 March 2014 Optimization using detective quantum efficiency (DQE) of the high-resolution parallel-hole collimators with CdTe pixelated semiconductor SPECT system

Young-Jin Lee, Dae-Hong Kim, Ye-seul Kim, Hee-Joung Kim

Author Affiliations +

Proceedings Volume 9033, Medical Imaging 2014: Physics of Medical Imaging; 90334J (2014) https://doi.org/10.1117/12.2043006
Event: SPIE Medical Imaging, 2014, San Diego, California, United States

Abstract

In previous study, to improve both sensitivity and spatial resolution, we recommended to use a pixelated parallel-hole collimator with equal hole and pixel sizes based on CdTe pixelated semiconductor SPECT system. However, the tradeoff between sensitivity and spatial resolution is needed before determination of pixelated parallel-hole collimator geometric designs. The detective quantum efficiency (DQE) is a concept which takes both the sensitivity and spatial resolution into account to provide an overall measure and may be better suited for optimization. The purpose of this study was to optimize and evaluate the above-mentioned collimators using DQE to determine the best image performance of CdTe pixelated semiconductor SPECT system. We conducted a simulation study using a Geant4 Application for Tomographic Emission (GATE) simulation. To evaluate the DQE from modulation transfer function (MTF) and sensitivity, the collimator septal heights were varied from 15 to 30 mm in 5 mm increments at step and source-to-collimator distances were 4, 5, 6, and 7 cm. According to the results, the DQE decreased with increasing source-to-collimator distance and septal height. We have presented the evaluation results of pixelated parallel-hole collimators with various geometric designs. In conclusion, we successfully optimized the pixelated parallel-hole collimator, and based on our results, we recommended using lower septal height with smaller source-to-collimator distance with CdTe pixelated semiconductor SPECT system.

Citation Download Citation

Young-Jin Lee, Dae-Hong Kim, Ye-seul Kim, and Hee-Joung Kim "Optimization using detective quantum efficiency (DQE) of the high-resolution parallel-hole collimators with CdTe pixelated semiconductor SPECT system", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 90334J (19 March 2014); https://doi.org/10.1117/12.2043006

ACCESS THE FULL ARTICLE

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
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Collimators

Semiconductors

Single photon emission computed tomography

Spatial resolution

Modulation transfer functions

Sensors

Gamma radiation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years