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NMR screening method
V
New Patents
being rotated, in the form of fan beams covering a region of the object to be examined, and (b) a multielement x-ray detector for detecting x-ray fan beams transmitted through the object to thus collect data around the irradiated object; an arithmetic device for arithmetically reconstructing the distribution of the x-ray absorption coefficients of the object across a measured cross-section from the data; and a display for displaying the distribution where the arithmetic device includes a device for producing data equivalent to data ‘derived from parallel beams not regularly spaced apart from each other from the collected data around the irradiated object, a device for subjecting the produced data to filtering, and a device for correcting inhomogeneity in the data equivalent to data derived from pa.rallel beams not regularly spaced and for back-projecting the image of the distribution.
4769829 CT SCANNER AND DETECTOR THEREFOR Steve Webb, Martin 0 Leach, Pete Newbury, Teddington, United Kingdom assigned to The Institute of Cancer Research A CT scanner comprises a rotatable gantry 1 carrying an X-ray source 3 which provides a fanshaped beam of X-rays and an X-ray detector 10 which scans the X-ray intensity along a line in the plain of the beam. The gantry is rotatable about an axis A relative to a couch 2 which supports the patient under investigation. The X-ray detector 10 comprises two concentric X-ray masks exposed around a scintillator tube; the two masks having helical X-ray transmissive apertures, the helices being of opposed orientation so that rotation of the masks in opposite directions causes the exposed area of the scintillator tube to move along its length.
4770182 NMR SCREENING METHOD 4769827 CAT SCANNER Hideaki Uno, HErofumi Yanagita, Tokyo, Japan assigned to Yok.ogawa Medical Systems Limited The present invention provides a CAT (computerized axial tomography) scanner in which x-ray detector output currents are utilized efficiently and can be measured correctly, and which reconstructs an image of an object (11) under scrutiny without being materially affected by variations in the intensity of x-rays. The scanner has an x-ray tube (1) for continuously producing x-rays, which are directed toward an array (2) of x-ray detectors through the object (11). Capacitors (31-3502) are charged by the output currents from t.he x-ray detectors (21-2502) of the array. A control circuit controls first switches (41-4502) and a second switch (6) in such a way that each capacitor initiates a cyclic process immediately after the previous capacitor is fully discharged. The cyclic process consists of a measurement, a. resetting, and a charging. The control circuit also controls the order in which the cyclic operations are initiated, in such a way that the output currents from the x-ray detectors disposed near thle center of the array and the output currents from reference x-ray detectors are measured at quite close instants.
Raymond V Damadian, Anthony J Giambalvo, Rajendra Shenoy, Jan Votruba assigned to Fonar Corporation A medical screening method for examining a patient utilizing NMR techniques is disclosed. The method uses an NMR imaging apparatus which has a scanning volume region of a limited size and which is operative to produce, during the course of a single scanning operation, a collection of spatially encoded NMR image data for a set of volume elements defined by the part of the patient positioned in the scanning volume region. A patient is positioned within the NMR apparatus, the NMR apparatus operated to conduct a scanning operation, and the patient then moved so that an additional volume portion of the patient is positioned within the scanning volume region. The NMR apparatus is then operated to conduct a further scanning operation with respect to the additional volume portion. This procedure of moving the patient and conducting additional scanning operations is continued until substantially the entire body of the patient is scanned and NMR image data collected therefor. An array of selected region elements are selected from the various sets of volume elements so as to define a selected region of the patient which is contained within parts of the different scanned volume portions. A composite image of the patient in the selected region
New Patents
VI
is then produced from the stored collections of NMR image data by utilizing the spatially encoded NMR image data which corresponds to the selected region elements. Such method thus permits a convenient technique for conducting whole body scans of patients in a relatively short period of time.
4773086 OPERATOR CONSOLE FOR X-RAY TOMOGRAPHS Kenjiro Fujita, Isao Matsumoto, Tokyo, Japan assigned to Yokogawa Medical Systems Limited
An operator console for an X-ray tomograph, has a variety of switches sequentially actuatable for scanning operation of the X-ray tomograph. Each switch is provided with an indicator means for indicating a controllable condition to give the operator a switch operating procedure, and also with an indicator means for indicating a selected condition to allow the operator to know a current setting at a glance. The number of operating steps for routine scanning operation can be reduced by providing capability for presetting scanning parameters for respective body areas to be scanned. The operator console can easily be operated without any errors even by a novice operator.
For information about PATSEARCH@
Pergamon Orbit InfoLine Inc. 8000 Westpark Drive McLean, VA 22102 USA Telephone (703) 442-0900 Telex: 90-1811
Pergamon Orbit InfoLine Ltd 12 Vandy Street London EC2A 2DE UK Telephone (01) 377-4650 Telex: 8814614
New Patents
being rotated, in the form of fan beams covering a region of the object to be examined, and (b) a multielement x-ray detector for detecting x-ray fan beams transmitted through the object to thus collect data around the irradiated object; an arithmetic device for arithmetically reconstructing the distribution of the x-ray absorption coefficients of the object across a measured cross-section from the data; and a display for displaying the distribution where the arithmetic device includes a device for producing data equivalent to data ‘derived from parallel beams not regularly spaced apart from each other from the collected data around the irradiated object, a device for subjecting the produced data to filtering, and a device for correcting inhomogeneity in the data equivalent to data derived from pa.rallel beams not regularly spaced and for back-projecting the image of the distribution.
4769829 CT SCANNER AND DETECTOR THEREFOR Steve Webb, Martin 0 Leach, Pete Newbury, Teddington, United Kingdom assigned to The Institute of Cancer Research A CT scanner comprises a rotatable gantry 1 carrying an X-ray source 3 which provides a fanshaped beam of X-rays and an X-ray detector 10 which scans the X-ray intensity along a line in the plain of the beam. The gantry is rotatable about an axis A relative to a couch 2 which supports the patient under investigation. The X-ray detector 10 comprises two concentric X-ray masks exposed around a scintillator tube; the two masks having helical X-ray transmissive apertures, the helices being of opposed orientation so that rotation of the masks in opposite directions causes the exposed area of the scintillator tube to move along its length.
4770182 NMR SCREENING METHOD 4769827 CAT SCANNER Hideaki Uno, HErofumi Yanagita, Tokyo, Japan assigned to Yok.ogawa Medical Systems Limited The present invention provides a CAT (computerized axial tomography) scanner in which x-ray detector output currents are utilized efficiently and can be measured correctly, and which reconstructs an image of an object (11) under scrutiny without being materially affected by variations in the intensity of x-rays. The scanner has an x-ray tube (1) for continuously producing x-rays, which are directed toward an array (2) of x-ray detectors through the object (11). Capacitors (31-3502) are charged by the output currents from t.he x-ray detectors (21-2502) of the array. A control circuit controls first switches (41-4502) and a second switch (6) in such a way that each capacitor initiates a cyclic process immediately after the previous capacitor is fully discharged. The cyclic process consists of a measurement, a. resetting, and a charging. The control circuit also controls the order in which the cyclic operations are initiated, in such a way that the output currents from the x-ray detectors disposed near thle center of the array and the output currents from reference x-ray detectors are measured at quite close instants.
Raymond V Damadian, Anthony J Giambalvo, Rajendra Shenoy, Jan Votruba assigned to Fonar Corporation A medical screening method for examining a patient utilizing NMR techniques is disclosed. The method uses an NMR imaging apparatus which has a scanning volume region of a limited size and which is operative to produce, during the course of a single scanning operation, a collection of spatially encoded NMR image data for a set of volume elements defined by the part of the patient positioned in the scanning volume region. A patient is positioned within the NMR apparatus, the NMR apparatus operated to conduct a scanning operation, and the patient then moved so that an additional volume portion of the patient is positioned within the scanning volume region. The NMR apparatus is then operated to conduct a further scanning operation with respect to the additional volume portion. This procedure of moving the patient and conducting additional scanning operations is continued until substantially the entire body of the patient is scanned and NMR image data collected therefor. An array of selected region elements are selected from the various sets of volume elements so as to define a selected region of the patient which is contained within parts of the different scanned volume portions. A composite image of the patient in the selected region
New Patents
VI
is then produced from the stored collections of NMR image data by utilizing the spatially encoded NMR image data which corresponds to the selected region elements. Such method thus permits a convenient technique for conducting whole body scans of patients in a relatively short period of time.
4773086 OPERATOR CONSOLE FOR X-RAY TOMOGRAPHS Kenjiro Fujita, Isao Matsumoto, Tokyo, Japan assigned to Yokogawa Medical Systems Limited
An operator console for an X-ray tomograph, has a variety of switches sequentially actuatable for scanning operation of the X-ray tomograph. Each switch is provided with an indicator means for indicating a controllable condition to give the operator a switch operating procedure, and also with an indicator means for indicating a selected condition to allow the operator to know a current setting at a glance. The number of operating steps for routine scanning operation can be reduced by providing capability for presetting scanning parameters for respective body areas to be scanned. The operator console can easily be operated without any errors even by a novice operator.
For information about PATSEARCH@
Pergamon Orbit InfoLine Inc. 8000 Westpark Drive McLean, VA 22102 USA Telephone (703) 442-0900 Telex: 90-1811
Pergamon Orbit InfoLine Ltd 12 Vandy Street London EC2A 2DE UK Telephone (01) 377-4650 Telex: 8814614