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Proceedings Paper

Oversampling digital radiography imaging based on the 2x2 moving average filter for mammography detectors
Author(s): Dong Sik Kim; Eun Kim; Choul Woo Shin
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Paper Abstract

The conventional binning process can be described in terms of a technology called oversampling radiography imaging and is equivalent to applying the moving average filter followed by downsampling. In order to improve the performance of detective quantum efficiency (DQE) when conducting a 2 × 2 binning process compared to the conventional binning, a method to apply the moving average filter multiple times is proposed in this paper. For a theoretical analysis of the multiple filtering, an image formation model with the noise power spectrum and DQE measurements is first constructed. Monte Carlo simulations are then conducted to observe the filtering performance based on the theoretical analysis. For direct mammography detectors, which are based on a-Se, the DQE values were increased by more than 20% at 2lp/mm compared to the conventional 2 × 2 binning process. Since the multiple application of the moving average filter requires only shifting registers instead of the complicate floating-point multiplications, the filter can be easily implemented at the hardware controller level and can provide a fast data transmission capability.

Paper Details

Date Published: 9 March 2018
PDF: 10 pages
Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 1057362 (9 March 2018); doi: 10.1117/12.2293487
Show Author Affiliations
Dong Sik Kim, Hankuk Univ. of Foreign Studies (Korea, Republic of)
Eun Kim, DRTECH Co. (Korea, Republic of)
Choul Woo Shin, DRTECH Co. (Korea, Republic of)

Published in SPIE Proceedings Vol. 10573:
Medical Imaging 2018: Physics of Medical Imaging
Joseph Y. Lo; Taly Gilat Schmidt; Guang-Hong Chen, Editor(s)

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