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Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction
นักวิจัย : Zhang, Fan , Yoo, Yang Mo , Koh, Liang Mong , Kim, Yong Min
คำค้น : DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2550
อ้างอิง : Zhang, F., Yoo, Y. M., Koh, L. M. & Kim, Y. M. (2007). Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction. IEEE Transactions on Medical Imaging, 26(2), 200-211. , 0278-0062 , http://hdl.handle.net/10220/6337 , http://dx.doi.org/10.1109/TMI.2006.889735
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : IEEE transactions on medical imaging
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A new speckle reduction method, i.e., Laplacian pyramid-based nonlinear diffusion (LPND), is proposed for medical ultrasound imaging. With this method, speckle is removed by nonlinear diffusion filtering of bandpass ultrasound images in Laplacian pyramid domain. For nonlinear diffusion in each pyramid layer, a gradient threshold is automatically determined by a variation of median absolute deviation (MAD) estimator. The performance of the proposed LPND method has been compared with that of other speckle reduction methods, including the recently proposed speckle reducing anisotropic diffusion (SRAD) and nonlinear coherent diffusion (NCD). In simulation and phantom studies, an average gain of 1.55 dB and 1.34 dB in contrast-to-noise ratio was obtained compared to SRAD and NCD, respectively. The visual comparison of despeckled in vivo ultrasound images from liver and carotid artery shows that the proposed LPND method could effectively preserve edges and detailed structures while thoroughly suppressing speckle. These preliminary results indicate that the proposed speckle reduction method could improve image quality and the visibility of small structures and fine details in medical ultrasound imaging.

บรรณานุกรม :
Zhang, Fan , Yoo, Yang Mo , Koh, Liang Mong , Kim, Yong Min . (2550). Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Fan , Yoo, Yang Mo , Koh, Liang Mong , Kim, Yong Min . 2550. "Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zhang, Fan , Yoo, Yang Mo , Koh, Liang Mong , Kim, Yong Min . "Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2550. Print.
Zhang, Fan , Yoo, Yang Mo , Koh, Liang Mong , Kim, Yong Min . Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2550.