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Proceedings Paper

Development of adaptive noise reduction filter algorithm for pediatric body images in a multi-detector CT
Author(s): Eiji Nishimaru; Katsuhiro Ichikawa; Izumi Okita; Yuuji Ninomiya; Yukihiro Tomoshige; Takehiro Kurokawa; Yutaka Ono; Yuko Nakamura; Masayuki Suzuki
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Paper Abstract

Recently, several kinds of post-processing image filters which reduce the noise of computed tomography (CT) images have been proposed. However, these image filters are mostly for adults. Because these are not very effective in small (< 20 cm) display fields of view (FOV), we cannot use them for pediatric body images (e.g., premature babies and infant children). We have developed a new noise reduction filter algorithm for pediatric body CT images. This algorithm is based on a 3D post-processing in which the output pixel values are calculated by nonlinear interpolation in z-directions on original volumetric-data-sets. This algorithm does not need the in-plane (axial plane) processing, so the spatial resolution does not change. From the phantom studies, our algorithm could reduce SD up to 40% without affecting the spatial resolution of x-y plane and z-axis, and improved the CNR up to 30%. This newly developed filter algorithm will be useful for the diagnosis and radiation dose reduction of the pediatric body CT images.

Paper Details

Date Published: 11 March 2008
PDF: 10 pages
Proc. SPIE 6914, Medical Imaging 2008: Image Processing, 691421 (11 March 2008); doi: 10.1117/12.769739
Show Author Affiliations
Eiji Nishimaru, Hiroshima City Hospital (Japan)
Kanazawa Univ. (Japan)
Katsuhiro Ichikawa, Kanazawa Univ. (Japan)
Izumi Okita, Hiroshima City Hospital (Japan)
Yuuji Ninomiya, Hiroshima City Hospital (Japan)
Yukihiro Tomoshige, Hiroshima City Hospital (Japan)
Takehiro Kurokawa, Hiroshima City Hospital (Japan)
Yutaka Ono, Hiroshima City Hospital (Japan)
Yuko Nakamura, Kure City Medical Association Hospital (Japan)
Masayuki Suzuki, Kanazawa Univ. (Japan)

Published in SPIE Proceedings Vol. 6914:
Medical Imaging 2008: Image Processing
Joseph M. Reinhardt; Josien P. W. Pluim, Editor(s)

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