Patents by Inventor Yiu-Cho Chung
Yiu-Cho Chung has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10746833Abstract: A magnetic resonance vessel wall imaging method and device. The method comprises: applying a set pulse sequence into an imaging region, wherein the set pulse sequence comprises, in chronological order, a Delay Alternating with Nutation for Tailored Excitation (DANTE) pulse train, a variable flip angle train of a three-dimensional fast spin echo (SPACE), and a flip-down pulse train (S110); acquiring a magnetic resonance signal generated in the imaging region, and reconstructing a magnetic resonance images of the vessel wall in the imaging region according to the magnetic resonance signal (S120). By adding the flip-down pulse train behind the variable flip angle train of the three-dimensional fast spin echo (SPACE), the cerebrospinal fluid signals of the whole brain can be further suppressed effectively and uniformly, and the DANTE pulse train promotes the vessel wall imaging of the head and neck jointing portion.Type: GrantFiled: May 22, 2018Date of Patent: August 18, 2020Assignee: SHENZHEN INSTITUTES ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCESInventors: Lei Zhang, Yiu-Cho Chung, Xin Liu, Xiaoqing Hu, Hairong Zheng
-
Publication number: 20180267125Abstract: A magnetic resonance vessel wall imaging method and device. The method comprises: applying a set pulse sequence into an imaging region, wherein the set pulse sequence comprises, in chronological order, a Delay Alternating with Nutation for Tailored Excitation (DANTE) pulse train, a variable flip angle train of a three-dimensional fast spin echo (SPACE), and a flip-down pulse train (S110); acquiring a magnetic resonance signal generated in the imaging region, and reconstructing a magnetic resonance images of the vessel wall in the imaging region according to the magnetic resonance signal (S120). By adding the flip-down pulse train behind the variable flip angle train of the three-dimensional fast spin echo (SPACE), the cerebrospinal fluid signals of the whole brain can be further suppressed effectively and uniformly, and the DANTE pulse train promotes the vessel wall imaging of the head and neck jointing portion.Type: ApplicationFiled: May 22, 2018Publication date: September 20, 2018Inventors: Lei ZHANG, Yiu-Cho CHUNG, Xin LIU, Xiaoqing HU, Hairong ZHENG
-
Publication number: 20160047873Abstract: A fast magnetic resonance imaging method and system, the method comprising: applying a periodic radio-frequency pulse train to drive the magnetization vector of an imaging volume into a steady state (102); acquiring a free induction decay (FID) signal and an echo signal alternately in a steady-state free precession sequence (104); conducting an FID signal imaging and a T2-weighted imaging (106). Alternate acquisition of the FID signal and the echo signal in the steady-state free precession sequence effectively increases the signal-to-noise ratio (SNR) of the acquired signals and reduces the sensitivity of the sequence to motions.Type: ApplicationFiled: March 29, 2013Publication date: February 18, 2016Applicant: Shenzhen Institutes of Advanced Technology, Chinese Academy of SciencesInventors: Yiu-cho Chung, Yanjie Zhu, Xin Liu, Hairong Zheng
-
Patent number: 8798351Abstract: A cine imaging filter and method of use that includes a denoising image-filter based on the Karhunen-Loeve transform along the temporal direction to take advantage of the high temporal correlation among images. The cine imaging filter may further include the application of a simple formula describing the quantitative noise reduction capabilities of the KLT filter as a function of eigenimage cutoff. Additionally, the filter may validate its accuracy in numerical simulation and in in-vivo real time cine images. Furthermore, exemplary embodiments of the cine imaging filter may employ a technique to automatically select the optimal eigenimage cutoff to maximize noise reduction with minimal effect on image information.Type: GrantFiled: March 11, 2013Date of Patent: August 5, 2014Assignee: The Ohio State University Research FoundationInventors: Yu Ding, Orlando P. Simonetti, Yiu-Cho Chung
-
Patent number: 8639005Abstract: An exemplary embodiment of the present invention includes a method for increasing temporal resolution in Phase Contrast (PC) MR imaging. The increased temporal resolution may be obtained by reusing information encoded into phase of an MRI signal where said reuse occurs prior to the difference reconstruction.Type: GrantFiled: February 1, 2010Date of Patent: January 28, 2014Assignee: The Ohio State UniversityInventors: Orlando P. Simonetti, Yiu-Cho Chung, Hung-Yu Lin, Yu Ding, Jacob A. Bender
-
Publication number: 20130266239Abstract: A cine imaging filter and method of use that includes a denoising image-filter based on the Karhunen-Loeve transform along the temporal direction to take advantage of the high temporal correlation among images. The cine imaging filter may further include the application of a simple formula describing the quantitative noise reduction capabilities of the KLT filter as a function of eigenimage cutoff. Additionally, the filter may validate its accuracy in numerical simulation and in in-vivo real time cine images. Furthermore, exemplary embodiments of the cine imaging filter may employ a technique to automatically select the optimal eigenimage cutoff to maximize noise reduction with minimal effect on image information.Type: ApplicationFiled: March 11, 2013Publication date: October 10, 2013Inventors: Yu Ding, Orlando P. Simonetti, Yiu-Cho Chung
-
Publication number: 20120263365Abstract: A cine imaging filter and method of use that includes a denoising image-filter based on the Karhunen-Loeve transform along the temporal direction to take advantage of the high temporal correlation among images. The cine imaging filter may further include the application of a simple formula describing the quantitative noise reduction capabilities of the KLT filter as a function of eigenimage cutoff. Additionally, the filter may validate its accuracy in numerical simulation and in in-vivo real time cine images. Furthermore, exemplary embodiments of the cine imaging filter may employ a technique to automatically select the optimal eigenimage cutoff to maximize noise reduction with minimal effect on image information.Type: ApplicationFiled: June 25, 2012Publication date: October 18, 2012Applicant: The Ohio State University Research FoundationInventors: Yu Ding, Orlando P. Simonetti, Yiu-Cho Chung
-
Patent number: 8208709Abstract: A cine imaging filter and method of use that includes a denoising image-filter based on the Karhunen-Loeve transform along the temporal direction to take advantage of the high temporal correlation among images. The cine imaging filter may further include the application of a simple formula describing the quantitative noise reduction capabilities of the KLT filter as a function of eigenimage cutoff. Additionally, the filter may validate its accuracy in numerical simulation and in in-vivo real time cine images. Furthermore, exemplary embodiments of the cine imaging filter may employ a technique to automatically select the optimal eigenimage cutoff to maximize noise reduction with minimal effect on image information.Type: GrantFiled: April 17, 2009Date of Patent: June 26, 2012Assignee: The Ohio State University Research FoundationInventors: Yu Ding, Orlando P. Simonetti, Yiu-Cho Chung
-
Publication number: 20120051615Abstract: An exemplary embodiment of the present invention includes a method for increasing temporal resolution in Phase Contrast (PC) MR imaging. The increased temporal resolution may be obtained by reusing information encoded into phase of an MRI signal where said reuse occurs prior to the difference reconstruction.Type: ApplicationFiled: February 1, 2010Publication date: March 1, 2012Applicant: THE OHIO STATE UNIVERSITYInventors: Orlando P. Simonetti, Yiu-Cho Chung, Hung-Yu Lin, Yu Ding, Jacob A. Bender
-
Patent number: 7835780Abstract: An invasive device having an inductive coupling element. One embodiment of the invasive device includes a plurality of receive coils inductively coupled to a communicating coil. The receive coils are selectively tuned and detuned to receive MR signals for providing coordinate information used for device tracking. A second embodiment of the invasive device includes a receive coil having a plurality of winding elements separated from each other by different distances. A method of rapidly acquiring both the invasive device orientation and position information to dynamically adapt MR scan planes to continuously follow the invasive device relative to a target is provided. The target-navigation technique automatically defines the MR scan plane and a time domain multiplexing technique is applied for MR imaging and device tracking. Using these techniques, the acquired MR images shows both the invasive device and the target tissue.Type: GrantFiled: March 30, 2001Date of Patent: November 16, 2010Inventors: Jeffrey L. Duerk, Qiang Zhang, Michael Wendt, Yiu-Cho Chung, Jonathan S. Lewin, Elmar M. Merkle
-
Publication number: 20090263001Abstract: A cine imaging filter and method of use that includes a denoising image-filter based on the Karhunen-Loeve transform along the temporal direction to take advantage of the high temporal correlation among images. The cine imaging filter may further include the application of a simple formula describing the quantitative noise reduction capabilities of the KLT filter as a function of eigenimage cutoff. Additionally, the filter may validate its accuracy in numerical simulation and in in-vivo real time cine images. Furthermore, exemplary embodiments of the cine imaging filter may employ a technique to automatically select the optimal eigenimage cutoff to maximize noise reduction with minimal effect on image information.Type: ApplicationFiled: April 17, 2009Publication date: October 22, 2009Applicant: The Ohio State University Research FoundationInventors: Yu Ding, Orlando P. Simonetti, Yiu-Cho Chung
-
Patent number: 7521930Abstract: In a method and apparatus for accelerating MR temperature imaging used in MR-monitored high intensity focused ultrasound (HIFU) therapy, temperature changes are determined at the focus of the ultrasound during MR temperature imaging; determining the ideal acceleration rate needed for data sampling according to the temperature changes at said focus is determined, the variable-density (VD) data sampling in k-space is adjusted according to the determined ideal acceleration rate, and the data obtained from sampling are reconstructed to form an image. The capability of accelerating MR temperature imaging with both good temporal resolution and good spatial resolution is improved by determining the acceleration rate according to temperature changes at the ultrasound focus and by adjusting the VD data sampling of k-space and thereby the benefits of good flexibility, feasibility and stability are achieved.Type: GrantFiled: March 27, 2008Date of Patent: April 21, 2009Assignee: Siemens AktiengesellschaftInventors: Guo Bin Li, Yiu-Cho Chung, Qiang Zhang, Xiao Dong Zhou
-
Publication number: 20080238423Abstract: In a method and apparatus for accelerating MR temperature imaging used in MR-monitored high intensity focused ultrasound (HIFU) therapy, temperature changes are determined at the focus of the ultrasound during MR temperature imaging; determining the ideal acceleration rate needed for data sampling according to the temperature changes at said focus is determined, the variable-density (VD) data sampling in k-space is adjusted according to the determined ideal acceleration rate, and the data obtained from sampling are reconstructed to form an image. The capability of accelerating MR temperature imaging with both good temporal resolution and good spatial resolution is improved by determining the acceleration rate according to temperature changes at the ultrasound focus and by adjusting the VD data sampling of k-space and thereby the benefits of good flexibility, feasibility and stability are achieved.Type: ApplicationFiled: March 27, 2008Publication date: October 2, 2008Inventors: Guo Bin Li, Yiu-Cho Chung, Qiang Zhang, Xiao Dong Zhou
-
Patent number: 6404196Abstract: A method for correcting MRI motion artifacts and main field fluctuations. A series of data prints are acquired at read points along a radial axis to form a view (210). Subsequent views define a NMR data set. A processor stores the NMR data set and reconstructs an image array from a stored NMR data set by; a) reconstructing the NMR data set along a radial axis; b) producing a correction data array including correction values where each of the correction values is calculated as a function of the corresponding stored NMR datum and the stored NMR datum for the intersection of the first and subsequent projection (200) axes; c) applying the data in the correction array to the NMR data set to produce a final NMrR data set.Type: GrantFiled: April 4, 2001Date of Patent: June 11, 2002Assignee: Case Western Reserve UniversityInventors: Jeffrey L. Duerk, Michael Wendt, Ajit Shankaranaravanan, Yiu-Cho Chung, Jonathan S. Lewin, Elmar Merkle