Patents by Inventor Chi-Hua Tung

Chi-Hua Tung 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: 9646393
    Abstract: A medical imaging system includes a data store (16) of reconstruction procedures, a selector (24), a reconstructor (14), a fuser (28), and a display (22). The data store (16) of reconstruction procedures identifies a plurality of reconstruction procedures. The selector (24) selects at least two reconstruction procedures from the data store of reconstruction procedures based on a received input, each reconstruction procedure optimized for one or more image characteristics. The reconstructor (14) concurrently performs the selected at least two reconstruction procedures, each reconstruction procedure generates at least one image (26) from the at least one data store of imaging data (12). The fuser (28) fuses the at least two generated medical images to create a medical diagnostic image which includes characteristics from each generated image (26). The display (22) displays the medical diagnostic image.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: May 9, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Sven Prevrhal, Eberhard Sebastian Hansis, Joerg Bredno, Jinghan Ye, Xiyun Song, Chi-Hua Tung, Lingxiong Shao
  • Publication number: 20160350945
    Abstract: A system (10) and a method (100) iteratively reconstruct an image of a target volume of a subject. In each iteration of a plurality of iterations, an estimate image of the target volume (54) is forward projected (58) and compared (62) to received event data (44) to determine a discrepancy (64). The discrepancy (64) is back projected (66) and the back projection (68) updates (70) the estimate image (54). In at least one iteration, the estimate image (54) is filtered (52) in the image domain prior to being back projected.
    Type: Application
    Filed: February 18, 2015
    Publication date: December 1, 2016
    Applicant: Koninklijke Philips N.V.
    Inventors: Xiyun SONG, Jinghan YE, Zhiqiang HU, Changhong DAI, Varun VERMA, Chi-Hua TUNG
  • Patent number: 9476994
    Abstract: A positron emission tomography (PET) system includes a memory (18), a subject support (3), a categorizing unit (20), and a reconstruction unit (22). The memory (18) continuously records detected coincident event pairs detected by PET detectors (4). The subject support (3) supports a subject and moves in a continuous movement through a field of view (10) of the PET detectors (4). The categorizing unit (20) categorizes the recorded coincident pairs into each of a plurality of spatially defined virtual frame (14). The reconstruction unit (22) reconstructs the categorized coincident pairs of each virtual frame into a frame image and combines the frame images into a common elongated image.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: October 25, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Bin Zhang, Chi-Hua Tung, John Patrick Collins
  • Publication number: 20160183893
    Abstract: A nuclear scanner includes an annular support structure (12) which supports a plurality of radiation detector units (14), each detector unit including crystals (52), tiles (66) containing an array of crystals, or modules (14) of tiles. The detector units define annular ranks of crystals, and the annular ranks of crystals define spaces between the ranks. In another embodiment, the crystals define axial spaces between crystals. Separate rings of crystals have axial spaces that are staggered such that no area of the imaging region is missed. The spaces between the detector units may be adjusted to form uniform or non-uniform spacing. Moving the patient through the annular support structure compensates for reduced sampling under the spaces between ranks.
    Type: Application
    Filed: August 7, 2014
    Publication date: June 30, 2016
    Inventors: Bin ZHANG, Chi-Hua TUNG
  • Patent number: 9332955
    Abstract: A hybrid imaging system includes a first imaging system configured to acquire anatomical data of a first field of view of an anatomical structure. A second imaging system configured to acquire functional data of the anatomical structure, the second imaging system acquiring functional data in a two-pass list-mode acquisition scheme. A reconstruction processor configured to reconstruct the functional data based on attenuation data into an attenuation corrected image and reconstruct the anatomical data into one or more high resolution images of one or more regions of interest.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: May 10, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: John Patrick Collins, Chi-Hua Tung, Bin Zhang
  • Patent number: 9305377
    Abstract: A PET scanner (20, 22, 24, 26) generates a plurality of time stamped lines of response (LORs). A motion detector (30) detects a motion state, such as motion phase or motion amplitude, of the subject during acquisition of each of the LORs. A sorting module (32) sorts the LORs by motion state and a reconstruction processor (36) reconstructs the LORs into high spatial, low temporal resolution images in the corresponding motion states. A motion estimator module (40) determines a motion transform which transforms the LORs into a common motion state. A reconstruction module (50) reconstructs the motion corrected LORs into a static image or dynamic images, a series of high temporal resolution, high spatial resolution images.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: April 5, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Patrick Olivier, Amy Perkins, Bin Zhang, Chi-Hua Tung
  • Patent number: 9271652
    Abstract: When generating a magnetic resonance (MR) attenuation map (39), an MR image is segmented to identify a patient's body outline, soft tissue structures, and ambiguous structures comprising bone and/or air. To distinguish between bone and air in the ambiguous structures, a nuclear emission image (e.g., PET) of the same patient or region of interest is segmented. The segmented functional image data is correlated to the segmented MR image data to distinguish between bone and air in the ambiguous structures. Appropriate radiation attenuation values are assigned respectively to identify air voxels and bone voxels in the segmented MR image, and an MR attenuation map is generated from the enhanced segmented MR image, in which ambiguity between air and bone has been resolved. The MR attenuation map is used to generate an attenuation-corrected nuclear image, which is displayed to a user.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: March 1, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Zhiqiang Hu, Navdeep Ojha, Chi-Hua Tung
  • Publication number: 20150317441
    Abstract: A nuclear medicine scanner system (1) includes an intelligent scheduler (2) which schedules a plurality of patients, each for an ordered nuclear medicine scanning procedure with a nuclear medicine scanning device (4) based on data mined from prior patients with like scanning procedures and in a time window which minimizes the patient dose.
    Type: Application
    Filed: December 2, 2013
    Publication date: November 5, 2015
    Inventors: Benjamin LORMAN, Yu-Lung HSIEH, Varun VERMA, Chi-Hua TUNG, Changhong DAI
  • Publication number: 20150260857
    Abstract: A positron emission tomography (PET) system includes a memory (18), a subject support (3), a categorizing unit (20), and a reconstruction unit (22). The memory (18) continuously records detected coincident event pairs detected by PET detectors (4). The subject support (3) supports a subject and moves in a continuous movement through a field of view (10) of the PET detectors (4). The categorizing unit (20) categorizes the recorded coincident pairs into each of a plurality of spatially defined virtual frame (14). The reconstruction unit (22) reconstructs the categorized coincident pairs of each virtual frame into a frame image and combines the frame images into a common elongated image.
    Type: Application
    Filed: July 31, 2013
    Publication date: September 17, 2015
    Inventors: Bin Zhang, Chi-Hua Tung, John Patrick Collins
  • Publication number: 20150003708
    Abstract: A medical imaging system includes a data store (16) of re-construction procedures, a selector (24), a reconstructor (14), a fuser (28), and a display (22). The data store (16) of reconstruction procedures identifies a plurality of reconstruction procedures. The selector (24) selects at least two reconstruction procedures from the data store of reconstruction procedures based on a received input, each reconstruction procedure optimized for one or more image characteristics. The reconstructor (14) concurrently performs the selected at least two reconstruction procedures, each reconstruction procedure generates at least one image (26) from the at least one data store of imaging data (12). The fuser (28) fuses the at least two generated medical images to create a medical diagnostic image which includes characteristics from each generated image (26). The display (22) displays the medical diagnostic image.
    Type: Application
    Filed: January 28, 2013
    Publication date: January 1, 2015
    Inventors: Sven Prevrhal, Eberhard Sebastian Hansis, Joerg Bredno, Jinghan Ye, Xiyun Song, Chi-Hua Tung, Lingxiong Shao
  • Publication number: 20140369577
    Abstract: A database (52) stores image recipient reconstruction profiles each comprising image reconstruction parameter values. An image reconstruction module (30) is configured to reconstruct medical imaging data to generate a reconstructed image. An image reconstruction setup module (50) is configured to retrieve an image recipient reconstruction profile from the database (52) for an intended image recipient associated with a set of medical imaging data and to invoke the image reconstruction module (30) to reconstruct the set of medical imaging data using image reconstruction parameter values of the retrieved image recipient reconstruction profile to generate a reconstructed image for the intended image recipient. A feedback acquisition module (54) is configured to acquire feedback from the intended image recipient pertaining to the reconstructed image for the intended image recipient.
    Type: Application
    Filed: December 12, 2012
    Publication date: December 18, 2014
    Inventors: John Patrick Collins, Chi-Hua Tung, Bin Zhang
  • Publication number: 20140249408
    Abstract: A hybrid imaging system includes a first imaging system configured to acquire anatomical data of a first field of view of an anatomical structure. A second imaging system configured to acquire functional data of the anatomical structure, the second imaging system acquiring functional data in a two-pass list-mode acquisition scheme. A reconstruction processor configured to reconstruct the functional data based on attenuation data into an attenuation corrected image and reconstruct the anatomical data into one or more high resolution images of one or more regions of interest.
    Type: Application
    Filed: September 21, 2012
    Publication date: September 4, 2014
    Inventors: John Patrick Collins, Chi-Hua Tung, Bin Zhang
  • Publication number: 20140107476
    Abstract: A PET apparatus includes a detector array including individual detectors which receive radiation events from an imaging region. A movement controller controls at least one of relative longitudinal movement between a subject support and the detector array and circumferential movement between the detector array and the subject. A time stamp processor assigns a time stamp to each received radiation event. A list mode event storage buffer stores time stamped events. An event verification processor screens for coincidentally received radiation events, locations at which each pair of corresponding coincidentally received events defining a line of response. A reconstruction processor reconstructs valid events into an image representation of the imaging region.
    Type: Application
    Filed: June 1, 2012
    Publication date: April 17, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Chi-Hua Tung, Bin Zhang, Changhong Dai
  • Publication number: 20130336564
    Abstract: When generating a magnetic resonance (MR) attenuation map (39), an MR image is segmented to identify a patient's body outline, soft tissue structures, and ambiguous structures comprising bone and/or air. To distinguish between bone and air in the ambiguous structures, a nuclear emission image (e.g., PET) of the same patient or region of interest is segmented. The segmented functional image data is correlated to the segmented MR image data to distinguish between bone and air in the ambiguous structures. Appropriate radiation attenuation values are assigned respectively to identify air voxels and bone voxels in the segmented MR image, and an MR attenuation map is generated from the enhanced segmented MR image, in which ambiguity between air and bone has been resolved. The MR attenuation map is used to generate an attenuation-corrected nuclear image, which is displayed to a user.
    Type: Application
    Filed: March 2, 2012
    Publication date: December 19, 2013
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Zhiqiang Hu, Navdeep Ojha, Chi-Hua Tung
  • Patent number: 8611628
    Abstract: When compensating for truncated patient scan data acquired by a multi-modal PET/CT or PET/MR imaging system (14, 16), such as occurs when a patient is larger than a field of view for an anatomical imaging device, a segmented contour of a non-attenuation-corrected (NAC) PET image is used to identify a contour of the truncated region. An appropriate tissue type is used to fill in truncated regions of a truncated CT or MR image for the attenuation map. The corrected attenuation map is then used to generate an attenuation-corrected PET image of the patient or a region of interest. Alternatively, the system can be employed in PET/CT or PET/MR imaging scenarios where two modalities are performed sequentially (e.g., not simultaneously), and thus the contour derived from the PET scan can be compared to the CT or MR image to infer potential subject motion between the PET and CT or MR scans.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: December 17, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Zhiqiang Hu, Daniel Gagnon, Chi-Hua Tung
  • Patent number: 8600139
    Abstract: A method of processing a positron emission tomography (PET) imaging data set (30) acquired of a subject includes independently localizing each positron-electron annihilation event of the PET imaging data set based on time of flight (TOF) localization of the positron-electron annihilation event to form a generated image (34). The generated image may be displayed. The generated image is suitably used as the basis for an initial image of an iterative reconstruction (40) of the PET imaging data set (30) to produce a reconstructed image (42). A spatial contour (56) of an image of the subject in the PET imaging data set (30) is suitably delineated based on the generated image (34). A subject attenuation map (62) for use in PET image reconstruction (40) is suitably constructed based in part on the spatial contour (56).
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: December 3, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Bin Zhang, Zhiqiang Hu, Chi-Hua Tung
  • Publication number: 20130287278
    Abstract: A PET scanner (20, 22, 24, 26) generates a plurality of time stamped lines of response (LORs). A motion detector (30) detects a motion state, such as motion phase or motion amplitude, of the subject during acquisition of each of the LORs. A sorting module (32) sorts the LORs by motion state and a reconstruction processor (36) reconstructs the LORs into high spatial, low temporal resolution images in the corresponding motion states. A motion estimator module (40) determines a motion transform which transforms the LORs into a common motion state. A reconstruction module (50) reconstructs the motion corrected LORs into a static image or dynamic images, a series of high temporal resolution, high spatial resolution images.
    Type: Application
    Filed: December 22, 2011
    Publication date: October 31, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Patrick Olivier, Amy Perkins, Bin Zhang, Chi-Hua Tung
  • Publication number: 20120070057
    Abstract: A method of processing a positron emission tomography (PET) imaging data set (30) acquired of a subject includes independently localizing each positron-electron annihilation event of the PET imaging data set based on time of flight (TOF) localization of the positron-electron annihilation event to form a generated image (34). The generated image may be displayed. The generated image is suitably used as the basis for an initial image of an iterative reconstruction (40) of the PET imaging data set (30) to produce a reconstructed image (42). A spatial contour (56) of an image of the subject in the PET imaging data set (30) is suitably delineated based on the generated image (34). A subject attenuation map (62) for use in PET image reconstruction (40) is suitably constructed based in part on the spatial contour (56).
    Type: Application
    Filed: May 4, 2010
    Publication date: March 22, 2012
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Bin Zhang, Zhiqiang Hu, Chi-Hua Tung
  • Publication number: 20110058722
    Abstract: When compensating for truncated patient scan data acquired by a multi-modal PET/CT or PET/MR imaging system (14, 16), such as occurs when a patient is larger than a field of view for an anatomical imaging device, a segmented contour of a non-attenuation-corrected (NAC) PET image is used to identify a contour of the truncated region. An appropriate tissue type is used to fill in truncated regions of a truncated CT or MR image for the attenuation map. The corrected attenuation map is then used to generate an attenuation-corrected PET image of the patient or a region of interest. Alternatively, the system can be employed in PET/CT or PET/MR imaging scenarios where two modalities are performed sequentially (e.g., not simultaneously), and thus the contour derived from the PET scan can be compared to the CT or MR image to infer potential subject motion between the PET and CT or MR scans.
    Type: Application
    Filed: May 4, 2009
    Publication date: March 10, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Zhiqiang Hu, Daniel Gagnon, Chi-Hua Tung
  • Patent number: 6787777
    Abstract: A gamma camera includes a plurality of detectors (32, 34) for detecting emission radiation emitted from within a subject and transmission radiation which has traversed a subject to be imaged, the subject attenuating the radiation. Each detector generates position and energy data. At least one transmission radiation source (54, 54′) transmits transmission radiation through an examination region (36) to a first segment (74, 74′) of the opposite detector. In one embodiment, segment selector circuitry (88) connected with the detectors selectively disables a portion of each detector head during collection of emission data, transmission data, or both. In another embodiment, transmission radiation is received by the first segment (74, 74′) simultaneously with emission radiation being received by a second segment (72, 72′) of each detector. The first segment is uncollimated or collimated for the transmission radiation source.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: September 7, 2004
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Daniel Gagnon, Chi-Hua Tung