Werner N. Roeck - Irvine CA, US Orhan Nalcioglu - Irvine CA, US
Assignee:
The Regents of the University of California - Oakland CA
International Classification:
G01V 3/00
US Classification:
324307, 324300
Abstract:
An apparatus and method for performing dual modality SPECT/MRI imaging on an object in combination with a whole-body MRI system includes a collimated nuclear radiation detector for receiving radiation from the object, and a radiofrequency MRI coil enveloping the object and interfaced with the collimated nuclear radiation detector. The MRI coil and collimated detector are arranged and configured for disposition within the whole-body MRI system.
Sense Optimized Mri Rf Coil Designed With A Target Field Method
Lutfi Muftuler - Aliso Viejo CA, US Gang Chen - Irvine CA, US Orhan Nalcioglu - Laguna Beach CA, US
Assignee:
The Regents of the University of California - Oakland CA
International Classification:
G01V 3/00 B23P 17/04 H01F 7/06
US Classification:
324318, 29592, 296021, 29605
Abstract:
An MRI RF coil that is optimized for SENSE imaging is used in a method where the surface current density distribution on a coil former was calculated to maximize the SNRwithin a volume of interest. An analytic relationship was formulated between the SNRand surface current density on the coil former. The SNR at pixel ρ in a SENSE-MR image, SNR, is inversely proportional to the g-factor. The g-factor was formulated in terms of the B distribution of the coils. By specifying the geometry of the desired coil former and using a finite element mesh, the surface current distribution was calculated to maximize the SNR, by minimizing (1/SNR) in the volume of interest using a least squares procedure. A simple two-coil array was tested and phantom images were collected. The results show that the new coil design method yielded better uniformity and SNR compared to standard coils.
Rf Coil For Use In Magnetic Resonance Imaging In Integrated Spect And Mr Imaging
Werner N. Roeck - Irvine CA, US Orhan Nalcioglu - Irvine CA, US Seung-Hoon Ha - Irvine CA, US
Assignee:
The Regents of the University of California - Oakland CA
International Classification:
A61B 5/055
US Classification:
600411
Abstract:
An apparatus and method for performing dual modality SPECT/MRI imaging on an object in combination with a whole-body MRI system includes a collimated nuclear radiation detector for receiving radiation from the object, and a radiofrequency MRI coil enveloping the object and interfaced with the collimated nuclear radiation detector. The MRI coil and collimated detector are arranged and configured for disposition within the whole-body MRI system.
Orhan Nalcioglu - Newport Coast CA, US Werner Roeck - Irvine CA, US Keum Sil Lee - Irvine CA, US
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA
International Classification:
A61B 5/055
US Classification:
600411
Abstract:
A method for obtaining a high-resolution nuclear image of a biological object, which image is acquired by a nuclear detector inside an MRI system includes the steps of acquiring MRI information pertaining to a wide field of view; focusing a field of view of the nuclear detector to a small region that covers only the target region; obtaining a nuclear image of the small region; and using a priori information included in the MRI information to eliminate image artifacts in the nuclear image. An apparatus for performing the method and a data image formed by practice of the method is also included.
Mr Compatible Compression Based Nuclear Imaging System For Breast Cancer
Orhan Nalcioglu - Newport Coast CA, US Werner W. Roeck - Irvine CA, US
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA
International Classification:
A61B 6/00 A61B 5/055
US Classification:
600411
Abstract:
An apparatus combines magnetic resonance (MR) and nuclear imaging of human breast for cancer diagnosis. An MRI system including an MR breast RF coil is combined with a nuclear imaging system having a detector disposed or disposable within the MR breast RF coil arranged and configured for the performance of simultaneous or sequential coregistered breast MRI and nuclear imaging. A selectively controlled compression mechanism for lightly compresses the breast being imaged. The remotely controlled compression mechanism is integrated with the MR breast RF coil.
Apparatus And Method For Quantitative Noncontact In Vivo Fluorescence Tomography Using A Priori Information
Orhan Nalcioglu - Newport Coast CA, US Gultekin Gulsen - Irvine CA, US Yuting Lin - Mission Viejo CA, US
Assignee:
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA
International Classification:
A61B 6/02
US Classification:
600427
Abstract:
An apparatus for providing an integrated tri-modality system includes a fluorescence tomography subsystem (FT), a diffuse optical tomography subsystem (DOT), and an x-ray tomography subsystem (XCT), where each subsystem is combined in the integrated tri-modality system to perform quantitative fluorescence tomography with the fluorescence tomography subsystem (FT) using multimodality imaging with the x-ray tomography subsystem (XCT) providing XCT anatomical information as structural a priori data to the integrated tri-modality system, while the diffuse optical tomography subsystem (DOT) provides optical background heterogeneity information from DOT measurements to the integrated tri-modality system as functional a priori data. A method includes using FT, DOT, and XCT in an integrated fashion wherein DOT data is acquired to recover the optical property of the whole medium to accurately describe photon propagation in tissue, where structural limitations are derived from XCT, and accurate fluorescence concentration and lifetime parameters are recovered to form an accurate image.
Apparatus And Method For Real-Time K-Space Mapping Of The Scanning Operation Of A Magnetic Resonance Imaging System
C. Celil Guclu - Irvine CA Orhan Nalcioglu - Laguna Beach CA
Assignee:
The Regents of the University of California - Oakland CA
International Classification:
G01V 300
US Classification:
324322
Abstract:
The gradient coil currents driving the RF gradient coil within an magnetic resonance imaging system are noninvasively monitored with Hall-effect sensors to produce a real-time, k-space map of the scanning gradient coil currents. The k-space map, when visually depicted, readily displays imperfections in the magnetic resonance imaging scanning hardware and software, more particularly in the scanning gradient coil currents. Based on the k-space map imperfections which are determined from analysis of the k-space map, operation of the magnetic resonance imaging system may be remotely monitored in real-time, and remotely repaired or altered to improve the magnetic resonance image quality. The k-space, real-time map can also be used as a real-time system development for use as a research and design tool for magnetic resonance imaging systems.
Digitally Aided Microfluoroscopy And Fluorospot System And Method Of Using The Same
Werner W. Roeck - Irvine CA Orhan Nalcioglu - Laguna Beach CA John T. Martin - Riverside CA
Assignee:
The Regents of the University of California - Oakland CA
International Classification:
H05G 164
US Classification:
378 983
Abstract:
An improvement is made in a high resolution clinical fluoroscopic system by utilizing a beam splitter for selectively directing a fluoroscopic image of an X-ray pattern transmitted through a patient to either a low resolution or high resolution television channel. The low resolution channel operates a low magnification level to provide a macroscopic view of an object of interest in order to orient the patient and object of interest within the center of view. Thereafter, the beam splitter is activated to redirect the fluoroscopic image to a zoom lens which magnifies the image. The magnified image is then scanned by a sensitive CCD-type camera to alternatively produce through the video processor a magnified view of the object of interest at variable magnification having submillimeter resolution. Collimation of the X-ray beam is coordinated with the degree of magnification through the zoom lens to provide for contrast resolution without any substantial increase of the X-ray exposure levels.