Theodore Alan Resnick, 782487 N Taylor Rd UNIT 11, Cleveland Hts, OH 44118

6608569, Aug 19, 2003

Oct 15, 2001

09/977749

Mark D. Herold - Stow OH
Theodore A. Resnick - Beachwood OH

Koninklijke Philips Electronics, N.V. - Eindhoven

G08B 100

340999, 3406863, 378 15, 378 982

A computerized tomography system includes a stationary section (A) and a rotating section electrically linked by at least one interconnecting slip ring (D). On one side the slip ring (D) is configured as a series of electrically conductive segments ( A- H) separated by non-conductive interruptions ( A- H). On the other side a like number of transmitters ( A- H) is in selective electrical contact with the conductive segments ( ) depending on a position of the rotating frame. Also included is a de-multiplexer ( ) which takes image data from the plurality of receivers (RxA-RxH) and rearranges the image data in a determined sequence. Also shown is an angular encoder ( ) for providing angular displacement signals ( ) to the de-multiplexer ( ) for assistance in reconstructing the data channels ( ) in the determined sequence.

7406154, Jul 29, 2008

Jan 5, 2004

10/541563

Theodore A Resnick - Beachwood OH, US

Koninklijke Philips Electronics N.V. - Eindhoven

H05G 1/44

378113, 378138

A dose-modulated irradiating system includes an x-ray tube () with at least a filament () for generating electrons, a cathode () and an anode () for accelerating and collimating the generated electrons into an electron beam (), and an electrostatic grid with grid electrodes () for steering the electron beam () on the anode (). The anode () generates an x-ray beam () responsive to the electron beam (). Grid biasing is provided for applying a time-varying electrical bias to the grid electrodes () that produces a first time-varying intensity modulation of the electron beam (). A current of the filament () is modulated to produce a second time-varying intensity modulation of the electron beam (). A controller () controls cooperatively combining the first and second time-varying intensity modulations to produce a combined time-varying intensity modulation.

4311913, Jan 19, 1982

Oct 4, 1979

6/081674

Theodore A. Resnick - Cleveland Heights OH
Walter A. Dupuis - Cleveland Heights OH

Picker Corporation - Cleveland OH

H05G 130

250409

A closed loop feedback system for controlling the current output of an x-ray tube. The system has circuitry for improving the transient response and stability of the x-ray tube current over a substantial nonlinear portion of the tube current production characteristic. The system includes a reference generator for applying adjustable step function reference signals representing desired tube currents. The system also includes means for instantaneous sensing of actual tube current. An error detector compares the value of actual and reference tube current and produces an error signal as a function of their difference. The system feedback loop includes amplification circuitry for controlling x-ray tube filament DC voltage to regulate tube current as a function of the error signal value. The system also includes compensation circuitry, between the reference generator and the amplification circuitry, to vary the loop gain of the feedback control system as a function of the reference magnitude.

6215842, Apr 10, 2001

Aug 13, 1998

9/132800

Theodore A. Resnick - Beachwood OH
Rodney A. Mattson - Mentor OH

H05G 134

378 16

An x-ray radiation stabilization system is provided including an x-ray tube (20) which emits x-ray radiation (22). The x-ray tube (20) has an anode (52), a cathode (50), and a vacuum envelope (54) which houses the anode (52) and the cathode (50). A high-voltage generator (40) is connected to the x-ray tube (20). It supplies a high-voltage electric potential between the cathode (50) and anode (52) such that an electron beam flows therebetween. The electron beam strikes the anode (52) producing the x-ray radiation (22). A reference radiation detector (60) samples a representative portion of the x-ray radiation (22) emitted by the x-ray tube (20) and generates an error signal in response to an intensity of the sampled x-ray radiation (22). A feedback circuit (80) is connected between the reference radiation detector (60) and the high-voltage generator (40). The feedback circuit (80) processes the error signal and in response thereto directs the high-voltage generator (40) to adjust the high-voltage electric potential supplied to the x-ray tube (20) so that in the x-ray radiation (22) ripple having a predetermined frequency range is substantially canceled.

4453263, Jun 5, 1984

Dec 30, 1981

6/335591

Theodore A. Resnick - Cleveland Heights OH
Walter A. Dupuis - Cleveland Heights OH
Anthony Palermo - South Euclid OH

Picker Corporation - Cleveland OH

H05G 132

378112

An x-ray tube voltage generator with automatic stabilization circuitry is disclosed. The generator includes a source of pulsating direct current voltage such as from a rectified 3 phase transformer. This pulsating voltage is supplied to the cathode and anode of an x-ray tube and forms an accelerating potential for electrons within that tube. The accelerating potential is stabilized with a feedback signal which is provided by a feedback network. The network includes an error signal generator which compares an instantaneous accelerating potential with a preferred reference accelerating potential and generates an error function. This error function is transmitted to a control tube grid which in turn causes the voltage difference between x-ray tube cathode and anode to stabilize and thereby reduce the error function. In this way stabilized accelerating potentials are realized and uniform x-ray energy distributions produced.

6327327, Dec 4, 2001

Sep 27, 1999

9/406448

Mark D. Herold - Stow OH
Theodore A. Resnick - Beachwood OH

Picker International, Inc. - Highland Heights OH

H05G 104

378 15

A computerized tomography system includes a stationary section (A) and a rotating section electrically linked by at least one interconnecting slip ring (D). On one side the slip ring (D) is configured as a series of electrically conductive segments (20A-20H) separated by non-conductive interruptions (22A-22H). On the other side a like number of transmitters (26A-26H) is in selective electrical contact with the conductive segments (20) depending on a position of the rotating frame. Also included is a de-multiplexer (40) which takes image data from the plurality of receivers (RxA-RxH) and rearranges the image data in a determined sequence. Also shown is an angular encoder (46) for providing angular displacement signals (44) to the de-multiplexer (40) for assistance in reconstructing the data channels (30) in the determined sequence.

5978438, Nov 2, 1999

Dec 12, 1997

8/992866

Theodore A. Resnick - Beachwood OH
David A. Wilcox - Chesterland OH
Rodney A. Mattson - Mentor OH

Picker International, Inc. - Highland Heights OH

H05G 160

378 4

A radiographic scanner (10) has a stationary gantry portion (12) defining a subject receiving region (16) and a rotating gantry portion (20) on which an imaging x-ray tube (22) is mounted. The rotating gantry portion (20) is rotatably mounted to the stationary gantry portion (12) for rotation about the subject receiving region (16). A slip ring assembly extending around the subject receiving region (16) connected with the stationary and rotating gantry portions, includes a scintillating optical fiber (44) mounted around the patient receiving region (16) to one of the rotating and stationary gantry portions. A communication x-ray tube (40) is mounted to the other gantry portion and directed such that radiation therefrom enters the scintillating optical fiber (44) from a lateral direction. The scintillating optical fiber (44) converts the incident x-rays (52) to light (58) and transmits the light (58) along its longitudinal axis. The scintillating optical fiber (44) is enclosed in a protective sheathing (50) that is opaque to optical radiation which protects the fiber from damage and eliminates noise, inaccuracy, and false signals caused by ambient and stray light entering the fiber.

5475729, Dec 12, 1995

Apr 8, 1994

8/224958

Rodney A. Mattson - Mentor OH
Theodore A. Resnick - Beachwood OH

Picker International, Inc. - Highland Heights OH

H01J 3504

378135

A toroidal x-ray tube (I) is supported and selectively positioned by a gantry (II). The x-ray tube includes a toroidal housing (A) in which a rotor (30) is rotatably mounted. One or more cathodes (C) are mounted on the rotor for generating an electron beam which strikes an anode (B) to generate a beam of x-rays which passes through a window (20) and strikes an annular ring of detectors (160). A grid bias control circuit (100) selectively applies a continuously adjustable bias to a grid (36) for regulating the electron current, hence the intensity of the x-ray beam. A scintillating optical fiber (110) extends around the exterior of the window. The scintillation optical fiber includes fluorescent dopant (116) which convert a very small fraction of the x-rays into optical light which is transmitted along the fibers to an opto-electric transducer (118). The opto-electric transducer is connected with the grid bias control circuit. The opto-electrical transducer (118) can also be connected with an intensity compensator (162) for adjusting the signals from the detector ring before they are reconstructed (164 ) into an image representation.