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http://dx.doi.org/10.5762/KAIS.2014.15.11.6702

Phase Image of Susceptibility Weighted Image Using High Pass Filter Improved Uniformity  

Lee, Ho-Beom (Department of Radiology, Asan Medical Center)
Choi, Kwan-Woo (Department of Radiology, Asan Medical Center)
Son, Soon-Yong (Department of Radiology, Asan Medical Center)
Na, Sa-Ra (Department of Radiology, Asan Medical Center)
Lee, Joo-Ah (Department of Radiation Oncology, Catholic University, Incheon St.Mary's Hospital)
Min, Jung-Whan (Department of Radiology, Shin-Gu University)
Kim, Hyun-Soo (Department of Radiology, Shin-Gu University)
Ma, Sang-Chull (Department of Radiologic Science, Shin han University)
Jeong, Yeon-Jae (Department of Rehabilitation Medicine, Hanyang University Medical Center)
Jeong, Yeon-Gyu (Department of Rehabilitation Medicine, Dongguk University Ilsan Medical Center)
Yoo, Beong-Gyu (Department of Radiotechnology, Wonkwang Health Science University)
Lee, Jong-Seok (Department of Radiotechnology, Wonkwang Health Science University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.11, 2014 , pp. 6702-6709 More about this Journal
Abstract
In this study, a susceptibility weighted image (SWI) showed a wrapped phase and a non-uniformity of the rapid susceptibility difference. Consequently, the bandwidth limits at low frequency were improved by applying HPF. From November 2013 to March 2014, a three-dimensional SWI was obtained from patients and compared with the existing images and HPF phase images. The maximum and minimum signal intensity differences and non-uniformity were analyzed. As a result, a high pass filter before and after applying the maximum and minimum of the signal intensity difference was decreased by 274.16% (498.98), and the non-uniformity was decreased by 439.55% (19.83). After applying the HPF, a comparison with the existing phase images revealed the HPF phase images to have high signal and image uniformity of the SWI image. A high pass filter method can effectively remove the non-uniformity and improve the overall image quality.
Keywords
High pass filter; Phase image; K-space; Wrapped phase; Non-uniformity;
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Times Cited By KSCI : 3  (Citation Analysis)
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