US3690309A - Radiocapsule for registering ionizing radiation in the cavities of human bodies - Google Patents

Radiocapsule for registering ionizing radiation in the cavities of human bodies Download PDF

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US3690309A
US3690309A US61370A US3690309DA US3690309A US 3690309 A US3690309 A US 3690309A US 61370 A US61370 A US 61370A US 3690309D A US3690309D A US 3690309DA US 3690309 A US3690309 A US 3690309A
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inverter
cavities
detector
radiocapsule
voltage
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Viktor Mikhailovich Pluzhnikov
Karl Davidovich Kalantarov
Jury Yakovlevich Gugnin
Valentin Sergeevich Semenov
Valentina Vasilievna Zelenina
Albert Ivanovich Filatov
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/18—Measuring radiation intensity with counting-tube arrangements, e.g. with Geiger counters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/07—Endoradiosondes
    • A61B5/073—Intestinal transmitters

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  • ABSTRACT A radiocapsule for registration of ionizing radiation in the cavities of human body, comprising a detector to register ionizing particles in the cavities of human body and to modulate r.f. signals of an inverter of a d.c. voltage into an a.c. sine voltage at the moment when ionizing particles are being registered, said inverter having a piezo-electric transformer.
  • the present invention relates generally to radiotelemetric systems for examination of the cavities of human body and more specifically, to radiocapsules for registration of ionizing radiation in the cavities of human body, with the radiocapsules serving as transmitters in radiotelemetric systems.
  • radiocapsules for registration of ionizing radiation in the cavities of human body comprising a detector which registers ionizing particles in the cavities of human body and modulates r.f. signals generated by an oscillator at the moment the ionizing particles are being registered.
  • an r.f. oscillator is formed as a l.f. relaxation inverter of a d.c. voltage into an a.c. pulsing voltage, and with the inverter incorporating a multicircuit transformer.
  • the detector causes the relaxation frequency of the inverter to vary, thereby providing frequency-pulse modulation of the r.f. signals being emitted.
  • r.f. oscillator as a relaxation inverter featuring pulse frequency modulation, is responsible for the dissipated power of r.f. signals which, in turn, affects in a detrimental manner the jamming invulnerability of the radio emission, impedes the obtaining of the required time resolution of the ionizing emission registration and complicates the entire construction of a radiotelemetric system.
  • the r.f. oscillator in accordance with the invention is made as an inverter of a d.c. voltage into an a.c. sine voltage and comprises a piezo-electric transformer electrically connected to the detector so as to ensure an amplitude modulation of the r.f. signals generated.
  • Such a construction of the herein-disclosed radiocapsule renders it more reliable, improved its production technology, reduces its size and simplifies the construction of a radiotelemetric system as a whole.
  • the radiocapsule for registration of ionizing radiation in the cavities of human body comprises a detector which is adapted to register ionizing particles in the cavities of human body (not shown in the drawing), said detector including a Geigen Muller counter 1 which modulates the r.f. signals generated by an oscillator 2 at the moment when ionizing particles are being registered, as well as comprising a rectifier 3 and a d.c.
  • the r.f. oscillator 2 is made as an r.f. inverter for a 5 which is prepared from polarized piezoceramics and having three electrodes (common, input and output ones) applied to the plate surface as a thin silver coatmg.
  • the rectifier 3 is built around diodes 10 and 11 and a capacitor 12 according to the voltage-doubling circuit.
  • the principle underlying the operation of the proposed radiocapsule resides in the variation of the resistance of the G-M counter 1 in response to the process of registering the ionizing particles.
  • the radiocapsule To register ionizing radiation in the cavity of a human body under examination the radiocapsule is to be introduced directly into the cavity to be examined.
  • the initial resistance of the G-M counter l is not to exceed 10 ohms, whereas a discharge caused by ionizing particles results in the resistance dropping down to IO IO ohms.
  • the resonance and degree of polarization of the transformer 9, as well as the value of the inductance 7 are so selected that the inverter operates under nominal (full-load) conditions only if the resistance of the G-M counter 1 loading the inverter reaches its maximum value, i.e., at zero discharge in the counter.
  • the inverter emits r.f. waves at a constant (maximum) amplitude and at an oscillator generation frequency which lies within the broadcast frequency bandwidth.
  • the principal emitting element is the inductance 7. No signal appears at the output of the receiver which is incorporated into a radiotelemetric system (not illustrated in the drawing).
  • the dropped-down resistance of the G-M counter 1 resulting from a discharge occurring therein disturbs the phase and amplitude balance in the inverter feedback circuit which results in a momentary dropping of the amplitude of the inverter oscillations to nearly zero. This, in turn, causes forth an abrupt voltage fall across the G-M counter 1 and causes the extinction of the discharge therein, whereupon the inverter restores its normal operating conditions until a next ionizing particle is registered.
  • the amplitude modulation of the r.f. signals occurs due to the GM counter 1 being interconnected with the inverter positive feedback circuit through the piezo-electric transformer 9.
  • the time for the continuous operation of the hereinproposcd radiocapsule without requiring replacing of its power source is at least 48 hours. This makes the radiocapsule applicable in effecting prolonged measurements of ionizing radiation in the cavities of human body, particularly, in the gastro-intestinal tract. Furthermore, the present radiocapsule will find application for locating intestinal hemorrhages and tumors through the use of radioactive isotopes, as well as in investigating the cycles of accumulation of radioactivity in the uterine cavity.
  • a radiocapsule for registering ionizing radiation in I the cavities of a human body comprising a detector means adapted to register ionizing particles in said cavities of the human body; an r.f. oscillator means simultaneously producing a voltage for supplying to said detector and radio signals modulated by said detector at the moment when each of the ionizing particles is being registered, said r.f. oscillator means including an r.f. emitting means and further comprising an inverter for a dc. voltage into an ac.
  • said inverter having an input electrically connected with said detector and an output generating modulated radio signals; said inverter including a transistor having an input providing the modulating input of said inverter; a piezoelectric transformer means connected to said r.f. oscillator, said piezo-electric transformer means having an input connected to the output of said transistor and said output being electrically connected with the input of said transistor and with the detector so as to ensure amplitude modulation of the radio signals; and a dc. voltage source means.

Abstract

A radiocapsule for registration of ionizing radiation in the cavities of human body, comprising a detector to register ionizing particles in the cavities of human body and to modulate r.f. signals of an inverter of a d.c. voltage into an a.c. sine voltage at the moment when ionizing particles are being registered, said inverter having a piezo-electric transformer.

Description

United States Patent Pluzhnikov et al.
[451 Sept. 12, 1972 [54] RADIOCAPSULE FOR REGISTERING IONIZING RADIATION IN THE CAVITIES OF HUMAN BODIES Inventors: Viktor Mikhailovich Pluzhnikov,
Filed:
Studenchesy gorodok MIFI, Korpus 6, kv. 32; Karl Davidovieh Kalantarov, ulitsa Serafimovicha, 2, kv. 469; Jury Yakovlevich Gugnin, Timiryazevskaya ulitsa, 10/12, kv. 108; Valentin Sergeevich Semenov, ulitsa Garibaldi, 23/56, Korpus 1, kv. 79; Valentina Vasilievna Zelenina, Studenchesky gorodok MIFI, Korpus 9, kv. 15; Albert Ivanovich Filatov, Nagomaya ulitsa, 64, 2a, kv. 61, all of Moscow, USSR.
Aug. 5, 1970 Appl. No.: 61,370
US. Cl ..128/2 A, 128/2 P, 128/2.1 A,
Int. Cl. ..A61b 5/07 Field of Search ..128/2 A, 2 P, 2.1 A, 2.1 R;
References Cited UNITED STATES PATENTS 4/1971 Temps et a1. ..128/2.1 A
Ros en ..321/8 2,975,354 3/1961 3,453,546 7/1969 Fryer ..128/2.1 A 3,478,344 11/1969 Schwitzgebel et a1. .128/2.1 A 3,427,454 2/ 1969 Webb ..128/2.1 R 3,487,239 12/1969 Schafft ..310/8.5 3,562,792 2/ 1971 Berlincourt et a1 ..310/8 3,562,563 2/1971 Schafft ..310/9.5 3,518,573 6/1970 Smith ..331/163 X FOREIGN PATENTS OR APPLICATIONS 244,402 4/1963 Australia ..l28/2 P OTHER PUBLICATIONS Intern. Conference Medical Electronics, 1959, pp. 300-306 Primary Examiner-Kyle L. Howell Att0rneyWaters, Roditi, Schwartz & Nissen [57] ABSTRACT A radiocapsule for registration of ionizing radiation in the cavities of human body, comprising a detector to register ionizing particles in the cavities of human body and to modulate r.f. signals of an inverter of a d.c. voltage into an a.c. sine voltage at the moment when ionizing particles are being registered, said inverter having a piezo-electric transformer.
1 Claim, 1 Drawing Figure PATENTEDSEP 12 I972 'llllll I RADIOCAPSULE FOR REGISTERING IONIZING RADIATION IN THE CAVITIES OF HUMAN BODIES The present invention relates generally to radiotelemetric systems for examination of the cavities of human body and more specifically, to radiocapsules for registration of ionizing radiation in the cavities of human body, with the radiocapsules serving as transmitters in radiotelemetric systems.
There exist in the art nowadays radiocapsules for registration of ionizing radiation in the cavities of human body, comprising a detector which registers ionizing particles in the cavities of human body and modulates r.f. signals generated by an oscillator at the moment the ionizing particles are being registered.
In the aforementioned radiocapsules an r.f. oscillator is formed as a l.f. relaxation inverter of a d.c. voltage into an a.c. pulsing voltage, and with the inverter incorporating a multicircuit transformer. At the moment the ionizing particles are being registered, the detector causes the relaxation frequency of the inverter to vary, thereby providing frequency-pulse modulation of the r.f. signals being emitted.
Provision of a multicircuit transformer possessing a large number of turns in the prior-art radiocapsules adversely affects their reliability, renders them too complicated to make and inadequately small in size.
Furthermore, provision of the r.f. oscillator as a relaxation inverter featuring pulse frequency modulation, is responsible for the dissipated power of r.f. signals which, in turn, affects in a detrimental manner the jamming invulnerability of the radio emission, impedes the obtaining of the required time resolution of the ionizing emission registration and complicates the entire construction of a radiotelemetric system.
It is an object of the present invention to provide a radiocapsule for registering ionizing radiation in the cavities of human body that will ensure an increased reliability and a higher quality of the registration of ionizing radiation.
It is another object of the present invention to provide a radiocapsule for registering ionizing radiation in the cavities of human body which has a small size and an improved production technology therefore.
According to the above-stated objects in a radiocapsule for registration of ionizing radiation in the cavities of human body, comprising a detector which is to register ionizing particles in the cavities of human body and to modulate r.f. signals generated by an oscillator at the moment the ionizing particles are being registered,, the r.f. oscillator in accordance with the invention is made as an inverter of a d.c. voltage into an a.c. sine voltage and comprises a piezo-electric transformer electrically connected to the detector so as to ensure an amplitude modulation of the r.f. signals generated.
Such a construction of the herein-disclosed radiocapsule renders it more reliable, improved its production technology, reduces its size and simplifies the construction of a radiotelemetric system as a whole.
The nature of the present invention is explained in the following disclosure of an exemplary embodiment thereof in conjunction with the accompanying drawing, wherein a circuit schematic of the herein-proposed radiocapsule is represented.
Referring now to the drawing, the radiocapsule for registration of ionizing radiation in the cavities of human body, according to the invention comprises a detector which is adapted to register ionizing particles in the cavities of human body (not shown in the drawing), said detector including a Geigen Muller counter 1 which modulates the r.f. signals generated by an oscillator 2 at the moment when ionizing particles are being registered, as well as comprising a rectifier 3 and a d.c.
low-voltage source 4 to supply power to the oscillator 2 The r.f. oscillator 2 is made as an r.f. inverter for a 5 which is prepared from polarized piezoceramics and having three electrodes (common, input and output ones) applied to the plate surface as a thin silver coatmg.
The rectifier 3 is built around diodes 10 and 11 and a capacitor 12 according to the voltage-doubling circuit.
The principle underlying the operation of the proposed radiocapsule resides in the variation of the resistance of the G-M counter 1 in response to the process of registering the ionizing particles.
To register ionizing radiation in the cavity of a human body under examination the radiocapsule is to be introduced directly into the cavity to be examined.
The initial resistance of the G-M counter l is not to exceed 10 ohms, whereas a discharge caused by ionizing particles results in the resistance dropping down to IO IO ohms.
Voltage necessary for the operation of the G-M counter 1 is fed thereto through the rectifier 3 from the output electrode of the piezo-electric transformer 9. A positive feedback voltage required for the inverter operation is fed from the same electrode through the capacitor 6 to the base of the transistor 5. Thus, the G- M counter 1 is thereby electrically connected to the inverter positive feedback circuit.
The resonance and degree of polarization of the transformer 9, as well as the value of the inductance 7 are so selected that the inverter operates under nominal (full-load) conditions only if the resistance of the G-M counter 1 loading the inverter reaches its maximum value, i.e., at zero discharge in the counter. As a result the inverter emits r.f. waves at a constant (maximum) amplitude and at an oscillator generation frequency which lies within the broadcast frequency bandwidth. The principal emitting element is the inductance 7. No signal appears at the output of the receiver which is incorporated into a radiotelemetric system (not illustrated in the drawing).
The dropped-down resistance of the G-M counter 1 resulting from a discharge occurring therein disturbs the phase and amplitude balance in the inverter feedback circuit which results in a momentary dropping of the amplitude of the inverter oscillations to nearly zero. This, in turn, causes forth an abrupt voltage fall across the G-M counter 1 and causes the extinction of the discharge therein, whereupon the inverter restores its normal operating conditions until a next ionizing particle is registered.
The short-time diminishing of the amplitude of the inverter oscillations and, consequently, of the amplitude of the r.f. waves emitted by the inverter, correspondingly causes a pulse to appear at the output of the receiver of the radiotelemetric system.
Thus, the amplitude modulation of the r.f. signals occurs due to the GM counter 1 being interconnected with the inverter positive feedback circuit through the piezo-electric transformer 9.
As it is evident from the above description of the radiocapsule operation some of the elements thereof (transformer 9, inductance 7, G-M counter I) perform a number of functions at a time. It is due to this fact that a high efficiency factor (mounting to 0.95) of the inverter of the present radiocapsule, high output power of the r.f. signals and jamming invulnerability of the radio transmission are attained. Provision of monofrequent amplitude-modulated r.f. signals ensures the required time resolution of the registration of ionizing radiation and makes simpler the construction of the radiotelemetric system as a whole.
The time for the continuous operation of the hereinproposcd radiocapsule without requiring replacing of its power source is at least 48 hours. This makes the radiocapsule applicable in effecting prolonged measurements of ionizing radiation in the cavities of human body, particularly, in the gastro-intestinal tract. Furthermore, the present radiocapsule will find application for locating intestinal hemorrhages and tumors through the use of radioactive isotopes, as well as in investigating the cycles of accumulation of radioactivity in the uterine cavity.
What is claimed is:
1. A radiocapsule for registering ionizing radiation in I the cavities of a human body, comprising a detector means adapted to register ionizing particles in said cavities of the human body; an r.f. oscillator means simultaneously producing a voltage for supplying to said detector and radio signals modulated by said detector at the moment when each of the ionizing particles is being registered, said r.f. oscillator means including an r.f. emitting means and further comprising an inverter for a dc. voltage into an ac. sine voltage, said inverter having an input electrically connected with said detector and an output generating modulated radio signals; said inverter including a transistor having an input providing the modulating input of said inverter; a piezoelectric transformer means connected to said r.f. oscillator, said piezo-electric transformer means having an input connected to the output of said transistor and said output being electrically connected with the input of said transistor and with the detector so as to ensure amplitude modulation of the radio signals; and a dc. voltage source means.

Claims (1)

1. A radiocapsule for registering ionizing radiation in the cavities of a human body, comprising a detector means adapted to register ionizing particles in said cavities of the human body; an r.f. oscillator means simultaneously producing a voltage for supplying to said detector and radio signals modulated by said detector at the moment when each of the ionizing particles is being registered, said r.f. oscillator means including an r.f. emitting means and further comprising an inverter for a d.c. voltage into an a.c. sine voltage, said inverter having an input electrically connected with said detector and an output generating modulated radio signals; said inverter including a transistor having an input providing the modulating input of said inverter; a piezoelectric transformer means connected to said r.f. oscillator, said piezo-electric transformer means having an input connected to the output of said transistor and said output being electrically connected with the input of said transistor and with the detector so as to ensure amplitude modulation of the radio signals; and a d.c. voltage source means.
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US4333010A (en) * 1981-05-08 1982-06-01 Miller William H Dose calibrator linearity evaluation
US5394048A (en) * 1992-07-27 1995-02-28 Kabushiki Kaisha Toshiba High-voltage generator
US5438985A (en) * 1993-01-25 1995-08-08 Synectics Medical, Incorporated Ambulatory recording of the presence and activity of substances in gastro-intestinal compartments
US5477860A (en) * 1992-11-05 1995-12-26 Synectics Medical, Inc. Catheter for measuring respiration and respiratory effort
US5477854A (en) * 1993-09-16 1995-12-26 Synectics Medical, Inc. System and method to monitor gastrointestinal Helicobacter pylori infection
US5479935A (en) * 1993-10-21 1996-01-02 Synectics Medical, Inc. Ambulatory reflux monitoring system
US5507289A (en) * 1993-09-16 1996-04-16 Synectics Medical, Inc. System and method to diagnose bacterial growth
US5551425A (en) * 1993-05-13 1996-09-03 Synectics Medical, Inc. Potential difference and perfusion pressure catheter
US5657759A (en) * 1993-05-13 1997-08-19 Synectics Medical, Incorporated Measurement of gastric emptying and gastrointestinal output
US5705879A (en) * 1994-01-27 1998-01-06 Hitachi Metals, Ltd. Discharge tube driving device and piezoelectric transformer therefor
US5810741A (en) * 1992-11-05 1998-09-22 Synectics Medical Ab Method of measuring respiration and respiratory effort using plural catheters
US5833625A (en) * 1993-10-21 1998-11-10 Synectics Medical Ab Ambulatory reflux monitoring system
US6054796A (en) * 1998-07-16 2000-04-25 Face International Corp. Positive feedback resonant transducer circuit
US6114797A (en) * 1997-05-27 2000-09-05 Face International Corp. Ignition circuit with piezoelectric transformer
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975354A (en) * 1956-11-30 1961-03-14 Gen Electric Electrical conversion apparatus
US3427454A (en) * 1965-12-23 1969-02-11 Webb James E Biomedical radiation detecting probe
US3453546A (en) * 1966-11-04 1969-07-01 Nasa Telemeter adaptable for implanting in an animal
US3478344A (en) * 1965-06-21 1969-11-11 Ralph K Schwitzgebel Behavioral supervision system with wrist carried transceiver
US3487239A (en) * 1968-12-10 1969-12-30 Motorola Inc Piezoelectric transformer
US3518573A (en) * 1968-09-03 1970-06-30 Bell Telephone Labor Inc Oscillator with multiresonator crystal feedback and load coupling
US3562563A (en) * 1969-03-26 1971-02-09 Motorola Inc Circumferentially slotted tubular piezoelectric transformer
US3562792A (en) * 1968-06-04 1971-02-09 Clevite Corp Piezoelectric transformer
US3576554A (en) * 1967-11-30 1971-04-27 Fairchild Hiller Corp Passive telemetry system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975354A (en) * 1956-11-30 1961-03-14 Gen Electric Electrical conversion apparatus
US3478344A (en) * 1965-06-21 1969-11-11 Ralph K Schwitzgebel Behavioral supervision system with wrist carried transceiver
US3427454A (en) * 1965-12-23 1969-02-11 Webb James E Biomedical radiation detecting probe
US3453546A (en) * 1966-11-04 1969-07-01 Nasa Telemeter adaptable for implanting in an animal
US3576554A (en) * 1967-11-30 1971-04-27 Fairchild Hiller Corp Passive telemetry system
US3562792A (en) * 1968-06-04 1971-02-09 Clevite Corp Piezoelectric transformer
US3518573A (en) * 1968-09-03 1970-06-30 Bell Telephone Labor Inc Oscillator with multiresonator crystal feedback and load coupling
US3487239A (en) * 1968-12-10 1969-12-30 Motorola Inc Piezoelectric transformer
US3562563A (en) * 1969-03-26 1971-02-09 Motorola Inc Circumferentially slotted tubular piezoelectric transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Intern. Conference Medical Electronics, 1959, pp. 300 306 *

Cited By (64)

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US4333010A (en) * 1981-05-08 1982-06-01 Miller William H Dose calibrator linearity evaluation
US5394048A (en) * 1992-07-27 1995-02-28 Kabushiki Kaisha Toshiba High-voltage generator
US5477860A (en) * 1992-11-05 1995-12-26 Synectics Medical, Inc. Catheter for measuring respiration and respiratory effort
US5810741A (en) * 1992-11-05 1998-09-22 Synectics Medical Ab Method of measuring respiration and respiratory effort using plural catheters
US5438985A (en) * 1993-01-25 1995-08-08 Synectics Medical, Incorporated Ambulatory recording of the presence and activity of substances in gastro-intestinal compartments
US5657759A (en) * 1993-05-13 1997-08-19 Synectics Medical, Incorporated Measurement of gastric emptying and gastrointestinal output
US6132372A (en) * 1993-05-13 2000-10-17 Synectics Medical, Incorporated Measurement of gastric emptying and gastrointestinal output
US5551425A (en) * 1993-05-13 1996-09-03 Synectics Medical, Inc. Potential difference and perfusion pressure catheter
US5507289A (en) * 1993-09-16 1996-04-16 Synectics Medical, Inc. System and method to diagnose bacterial growth
US5477854A (en) * 1993-09-16 1995-12-26 Synectics Medical, Inc. System and method to monitor gastrointestinal Helicobacter pylori infection
US5479935A (en) * 1993-10-21 1996-01-02 Synectics Medical, Inc. Ambulatory reflux monitoring system
US5833625A (en) * 1993-10-21 1998-11-10 Synectics Medical Ab Ambulatory reflux monitoring system
US5705879A (en) * 1994-01-27 1998-01-06 Hitachi Metals, Ltd. Discharge tube driving device and piezoelectric transformer therefor
US6114797A (en) * 1997-05-27 2000-09-05 Face International Corp. Ignition circuit with piezoelectric transformer
US6054796A (en) * 1998-07-16 2000-04-25 Face International Corp. Positive feedback resonant transducer circuit
US20060237652A1 (en) * 2000-08-21 2006-10-26 Yoav Kimchy Apparatus and methods for imaging and attenuation correction
US8094894B2 (en) 2000-08-21 2012-01-10 Spectrum Dynamics Llc Radioactive-emission-measurement optimization to specific body structures
US8565860B2 (en) 2000-08-21 2013-10-22 Biosensors International Group, Ltd. Radioactive emission detector equipped with a position tracking system
US8489176B1 (en) 2000-08-21 2013-07-16 Spectrum Dynamics Llc Radioactive emission detector equipped with a position tracking system and utilization thereof with medical systems and in medical procedures
US8620046B2 (en) 2000-08-21 2013-12-31 Biosensors International Group, Ltd. Radioactive-emission-measurement optimization to specific body structures
US8909325B2 (en) 2000-08-21 2014-12-09 Biosensors International Group, Ltd. Radioactive emission detector equipped with a position tracking system and utilization thereof with medical systems and in medical procedures
US9370333B2 (en) 2000-08-21 2016-06-21 Biosensors International Group, Ltd. Radioactive-emission-measurement optimization to specific body structures
US7826889B2 (en) 2000-08-21 2010-11-02 Spectrum Dynamics Llc Radioactive emission detector equipped with a position tracking system and utilization thereof with medical systems and in medical procedures
US7652259B2 (en) 2000-08-21 2010-01-26 Spectrum Dynamics Llc Apparatus and methods for imaging and attenuation correction
US8055329B2 (en) 2001-01-22 2011-11-08 Spectrum Dynamics Llc Ingestible device for radioimaging of the gastrointestinal tract
EP1359845A2 (en) * 2001-01-22 2003-11-12 V-Target Technologies Ltd. Ingestible device
EP1359845A4 (en) * 2001-01-22 2007-12-19 Target Technologies Ltd V Ingestible device
US8036731B2 (en) 2001-01-22 2011-10-11 Spectrum Dynamics Llc Ingestible pill for diagnosing a gastrointestinal tract
US20040138558A1 (en) * 2002-11-14 2004-07-15 Dunki-Jacobs Robert J Methods and devices for detecting tissue cells
US20040133095A1 (en) * 2002-11-14 2004-07-08 Dunki-Jacobs Robert J. Methods and devices for detecting abnormal tissue cells
US7968851B2 (en) 2004-01-13 2011-06-28 Spectrum Dynamics Llc Dynamic spect camera
US9040016B2 (en) 2004-01-13 2015-05-26 Biosensors International Group, Ltd. Diagnostic kit and methods for radioimaging myocardial perfusion
US10964075B2 (en) 2004-01-13 2021-03-30 Spectrum Dynamics Llc Gating with anatomically varying durations
US8676292B2 (en) 2004-01-13 2014-03-18 Biosensors International Group, Ltd. Multi-dimensional image reconstruction
US9470801B2 (en) 2004-01-13 2016-10-18 Spectrum Dynamics Llc Gating with anatomically varying durations
US8280124B2 (en) 2004-06-01 2012-10-02 Spectrum Dynamics Llc Methods of view selection for radioactive emission measurements
US20080260228A1 (en) * 2004-06-01 2008-10-23 Eli Dichterman Methods of View Selection for Radioactive Emission Measurements
US9943278B2 (en) 2004-06-01 2018-04-17 Spectrum Dynamics Medical Limited Radioactive-emission-measurement optimization to specific body structures
US8620679B2 (en) 2004-11-09 2013-12-31 Biosensors International Group, Ltd. Radiopharmaceutical dispensing, administration, and imaging
US8445851B2 (en) 2004-11-09 2013-05-21 Spectrum Dynamics Llc Radioimaging
US8571881B2 (en) 2004-11-09 2013-10-29 Spectrum Dynamics, Llc Radiopharmaceutical dispensing, administration, and imaging
US8586932B2 (en) 2004-11-09 2013-11-19 Spectrum Dynamics Llc System and method for radioactive emission measurement
US8606349B2 (en) 2004-11-09 2013-12-10 Biosensors International Group, Ltd. Radioimaging using low dose isotope
US9316743B2 (en) 2004-11-09 2016-04-19 Biosensors International Group, Ltd. System and method for radioactive emission measurement
US8615405B2 (en) 2004-11-09 2013-12-24 Biosensors International Group, Ltd. Imaging system customization using data from radiopharmaceutical-associated data carrier
US8423125B2 (en) 2004-11-09 2013-04-16 Spectrum Dynamics Llc Radioimaging
US10136865B2 (en) 2004-11-09 2018-11-27 Spectrum Dynamics Medical Limited Radioimaging using low dose isotope
US8000773B2 (en) 2004-11-09 2011-08-16 Spectrum Dynamics Llc Radioimaging
US8748826B2 (en) 2004-11-17 2014-06-10 Biosensor International Group, Ltd. Radioimaging methods using teboroxime and thallium
US20080033291A1 (en) * 2005-01-13 2008-02-07 Benny Rousso Multi-Dimensional Image Reconstruction and Analysis for Expert-System Diagnosis
US7872235B2 (en) 2005-01-13 2011-01-18 Spectrum Dynamics Llc Multi-dimensional image reconstruction and analysis for expert-system diagnosis
US8644910B2 (en) 2005-07-19 2014-02-04 Biosensors International Group, Ltd. Imaging protocols
US8837793B2 (en) 2005-07-19 2014-09-16 Biosensors International Group, Ltd. Reconstruction stabilizer and active vision
US8111886B2 (en) 2005-07-19 2012-02-07 Spectrum Dynamics Llc Reconstruction stabilizer and active vision
US7705316B2 (en) 2005-11-09 2010-04-27 Spectrum Dynamics Llc Dynamic SPECT camera
US8204500B2 (en) 2005-12-28 2012-06-19 Starhome Gmbh Optimal voicemail deposit for roaming cellular telephony
US8894974B2 (en) 2006-05-11 2014-11-25 Spectrum Dynamics Llc Radiopharmaceuticals for diagnosis and therapy
US7601966B2 (en) 2006-06-28 2009-10-13 Spectrum Dynamics Llc Imaging techniques for reducing blind spots
US8610075B2 (en) 2006-11-13 2013-12-17 Biosensors International Group Ltd. Radioimaging applications of and novel formulations of teboroxime
US9275451B2 (en) 2006-12-20 2016-03-01 Biosensors International Group, Ltd. Method, a system, and an apparatus for using and processing multidimensional data
US8521253B2 (en) 2007-10-29 2013-08-27 Spectrum Dynamics Llc Prostate imaging
US8492725B2 (en) 2009-07-29 2013-07-23 Biosensors International Group Ltd. Method and system of optimized volumetric imaging
US8748827B2 (en) 2009-07-29 2014-06-10 Biosensors International Group, Ltd. Method and system of optimized volumetric imaging
US8338788B2 (en) 2009-07-29 2012-12-25 Spectrum Dynamics Llc Method and system of optimized volumetric imaging

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