DAVID HERTZ
Pilots at Kirby Ct, Huntington Station, NY
License number
New York A2754417
Issued Date
Jul 2015
Expiration Date
Jul 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
3 Kirby Ct, Huntington Station, NY 11746
Professional information
David Hertz - Dix Hills, NY
Work:
Experimental Engineering International
Consultant Fonar Corporation
Chief engineer digital engineering, Fonar Corporation
Director Fonar Corporation
Senior Design Engineer Computerized Tomography
system engineer Israeli Air Force
Captain, Electronic Warfare Officer, Microwave Engineer Expert support
Consultant Fonar Corporation
Chief engineer digital engineering, Fonar Corporation
Director Fonar Corporation
Senior Design Engineer Computerized Tomography
system engineer Israeli Air Force
Captain, Electronic Warfare Officer, Microwave Engineer Expert support
Education:
Adelphi University
MBA Tel Aviv University, Graduate School
Biomedical Engineering Air force Academy Israel Institute of Technology
MBA Tel Aviv University, Graduate School
Biomedical Engineering Air force Academy Israel Institute of Technology
Diagnostic Simulator For Mri
US Patent:
6549009, Apr 15, 2003
Filed:
Jan 13, 2000
Appl. No.:
09/482259
Inventors:
David Hertz - Dix Hills NY
Michael B. Knepper - Lindenhurst NY
Michael B. Knepper - Lindenhurst NY
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01V 300
US Classification:
324309, 324307, 324322
Abstract:
A magnetic resonance imaging (âMRIâ) simulator for evaluating an MRI device comprises sections for being selectively coupled to the corresponding portions of the MRI device. Data representative of a previously imaged object is provided to the portions of the MRI device, for processing. The results of the processing are evaluated to determine whether portions of the MRI device are operating properly. Methods of evaluating an MRI device and an MRI device incorporating such a simulator are also disclosed.
Adaptive Dynamic Range Receiver For Mri
US Patent:
6621433, Sep 16, 2003
Filed:
Jun 22, 2001
Appl. No.:
09/887385
Inventors:
David Hertz - Dix Hills NY
Assignee:
Fonar Corporation - Melville NY
International Classification:
H03M 118
US Classification:
341139, 341155, 324309
Abstract:
A receiver for a resonance signal of a magnetic resonance imaging system generates a baseband signal for image processing by dividing a raw resonance signal among multiple parallel channels, each amplified at a respective gain. A digital channel selector determines, at any given moment, a lowest-distortion channel to be further processed. Amplitude and phase error compensation are handled digitally using complex multipliers, which are derived by a calibration, based on a simple Larmor oscillator, which can be done without the need for a sample and without repeating when measurement conditions are changed. One of the important benefits of the invention is that it provides for gain selection without repeated calibration steps. This is particularly important in systems that employ fast imaging techniques such as fast spin echo, where the invention can speed imaging substantially.
Magnetic Resonance Imaging Using Adaptive Phase Encoding Gradient
US Patent:
7436176, Oct 14, 2008
Filed:
Mar 27, 2006
Appl. No.:
11/389535
Inventors:
David Hertz - Dix Hills NY, US
Rajendra K. Shenoy - Dix Hills NY, US
Rajendra K. Shenoy - Dix Hills NY, US
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01V 3/00
US Classification:
324307, 324309
Abstract:
Through modification of the phase-encoding gradient, a method and apparatus increases the effectiveness of a Magnetic Resonance Imaging (MRI) device by decreasing scan time without noticeably decreasing the signal-to-noise ratio. In an MRI device, a patient is subjected to a constant magnetic field, and then radio frequency (RF) pulses are used to excite the nuclei in the patient's body. The nuclei release a corresponding RF signal as the nuclei relax, which can be measured and mapped into a visual display. The RF pulses used to excite the nuclei in the body cooperate with a slice select gradient and a phase-encoding gradient. When the phase-encoding gradient is indexed and prioritized according to contribution to image quality, then phase-encoding values with little or no contribution to image quality need not be acquired but may be replaced with randomized system noise, thereby decreasing total scan time without reducing the signal-to-noise ratio.
Magnetic Resonance Imaging Using Adaptive Phase Encoding Gradient
US Patent:
7852075, Dec 14, 2010
Filed:
Oct 10, 2008
Appl. No.:
12/249569
Inventors:
David Hertz - Dix Hills NY, US
Rajendra K. Shenoy - Dix Hills NY, US
Rajendra K. Shenoy - Dix Hills NY, US
Assignee:
Fonar Corporation L.P. - Melville NY
International Classification:
G01V 3/00
US Classification:
324307, 324309
Abstract:
Through modification of the phase-encoding gradient, a method and apparatus increases the effectiveness of a Magnetic Resonance Imaging (MRI) device by decreasing scan time without noticeably decreasing the signal-to-noise ratio. In an MRI device, a patient is subjected to a constant magnetic field, and then radio frequency (RF) pulses are used to excite the nuclei in the patient's body. The nuclei release a corresponding RF signal as the nuclei relax, which can be measured and mapped into a visual display. The RF pulses used to excite the nuclei in the body cooperate with a slice select gradient and a phase-encoding gradient. When the phase-encoding gradient is indexed and prioritized according to contribution to image quality, then phase-encoding values with little or no contribution to image quality need not be acquired but may be replaced with randomized system noise, thereby decreasing total scan time without reducing the signal-to-noise ratio.
Adaptive Dynamic Range Receiver For Mri
US Patent:
7403010, Jul 22, 2008
Filed:
Jul 20, 2005
Appl. No.:
11/185359
Inventors:
David Hertz - Dix Hills NY, US
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01V 3/00, H03M 1/00
US Classification:
324318, 341139
Abstract:
A receiver for a resonance signal of a magnetic resonance imaging system generates a baseband signal for image processing by dividing a raw resonance signal among multiple parallel channels, each amplified at a respective gain. A digital channel selector determines, at any given moment, a lowest-distortion channel to be further processed. Amplitude and phase error compensation are handled digitally using complex multipliers, which are derived by a calibration, based on a simple Larmor oscillator, which can be done without the need for a sample and without repeating when measurement conditions are changed. One of the important benefits of the invention is that it provides for gain selection without repeated calibration steps. This is particularly important in systems that employ fast imaging techniques such as fast spin echo, where the invention can speed imaging substantially.
Configurable Matrix Receiver For Mri
US Patent:
6977502, Dec 20, 2005
Filed:
Nov 4, 2003
Appl. No.:
10/700388
Inventors:
David Hertz - Dix Hills NY, US
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01V003/00
US Classification:
324318, 324319
Abstract:
A configurable matrix receiver comprises a plurality of antennas that detect one or more signals. The antennas are coupled to a configurable matrix comprising a plurality of amplifiers, one or more switches that selectively couple the amplifiers in series fashion, and one or more analog-to-digital converters (ADCs) that convert the output signals generated by the amplifiers to digital form. For example, in one embodiment, a matrix comprises a first amplifier having a first input and a first output, and a second amplifier having a second input and a second output, a switch to couple the first output of the first amplifier to a the second input of the second amplifier, a first ADC coupled to the first output of the first amplifier, and a second ADC coupled to the second output of the second amplifier. In one embodiment, the signals detected by the antennas include magnetic resonance (MR) signals.
Method Of Detecting And Compensating For Faults In An Mri Process
US Patent:
7557572, Jul 7, 2009
Filed:
Dec 19, 2006
Appl. No.:
11/612819
Inventors:
David Hertz - Dix Hills NY, US
Mark E. Hamberger - Bayshore NY, US
Terry Morrone - Melville NY, US
Mark E. Hamberger - Bayshore NY, US
Terry Morrone - Melville NY, US
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01V 3/00
US Classification:
324307
Abstract:
According to a method of detecting and compensating for MRI scan errors, MRI scan data are received. At least one statistical boundaries is determined for the generated data. The data are observed in K-space. The observed K-space data are compared to the determined statistical boundary. Data that are likely undesirable, based on the comparison, are removed. The removed data are replaced with substitute data to modify the data set. Images are generated from the modified data set.
Adaptive Dynamic Range Receiver For Mri
US Patent:
6943548, Sep 13, 2005
Filed:
Aug 22, 2003
Appl. No.:
10/646401
Inventors:
David Hertz - Dix Hills NY, US
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01R033/48, H01M001/10
US Classification:
324309, 324320, 341155
Abstract:
A receiver for a resonance signal of a magnetic resonance imaging system generates a baseband signal for image processing by dividing a raw resonance signal among multiple parallel channels, each amplified at a respective gain. A digital channel selector determines, at any given moment, a lowest-distortion channel to be further processed. Amplitude and phase error compensation are handled digitally using complex multipliers, which are derived by a calibration, based on a simple Larmor oscillator, which can be done without the need for a sample and without repeating when measurement conditions are changed. One of the important benefits of the invention is that it provides for gain selection without repeated calibration steps. This is particularly important in systems that employ fast imaging techniques such as fast spin echo, where the invention can speed imaging substantially.
Diagnostic Simulator For Mri
US Patent:
6025717, Feb 15, 2000
Filed:
Jun 23, 1997
Appl. No.:
8/880721
Inventors:
David Hertz - Dix Hills NY
Michael B. Knepper - Lindenhurst NY
Michael B. Knepper - Lindenhurst NY
Assignee:
Fonar Corporation - Melville NY
International Classification:
G01V 300
US Classification:
324310
Abstract:
A magnetic resonance imaging ("MRI") simulator for evaluating an MRI device comprises sections for being selectively coupled to the corresponding portions of the MRI device. Data representative of a previously imaged object is provided to the portions of the MRI device, for processing. The results of the processing are evaluated to determine whether portions of the MRI device are operating properly. Methods of evaluating an MRI device and an MRI device incorporating such a simulator are also disclosed.