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4965520 Magnetic resonance imaging method
Computerized
Pergamon
Medical Imaging and Graphics, Vol. 18, No. 1, pp. I-IV, 1994 Copyright 0 1994 Elswier Science Ltd Printed in the USA. All rights reserved 0895-611 l/94 $6.00 + .oO
NEW PATENTS
This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH@online database in accordance with interest profiles developed hy the Editors. Further information about Pergamon PATSEARCH@ can he obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102, U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Perganion Orbit InfoLine only.
4965520
A plurality of segmented radiation sensitive arrays (30) receive radiation from a radiation source (16) which has transversed an examination region (14) of a CT scanner (10). Each array includes a plurality of rows (A, B, C) of radiation sensitive cells, e.g. photodiodes, which produce an electrical signal indicative of the intensity of radiation received. Within each of the rows, there are larger cells and smaller cells. The electrical signals from each of the plurality of cells within each row are serialized (34) and amplified (36A, 36B, 36C). Selected combinations of the electrical signals from the various rows and larger and smaller elements within each row are combined (46) and reconstructed (50) into an image representation (52) for display on a video monitor or the like.
MAGNETIC RESONANCE IMAGING METHOD Hidenobu Sakamoto, Amagasaki, Japan assigned to Mitsubishi Denki Kabushiki Kaisha In an NMR imagmg method, the phase encode amount applied to the respective echo signals in the same sequence of operation are made to have different values and the phase encoding magnetic fields Gen are made to disorder the phases of the NMR signals so as not to generate stimulated echo signals. In another aspect, the time periods of application of the signal reading magnetic field Gp applied between the 90 degrees RF pulse and the 180 degrees RF pulse are made to have different values equal in number to the chemical shifts. By varying the time period of application of the signal reading magnetic field, spin echo signals having different phase variance amounts due to the different chemical shifts are generated before or after the time point at which the spin echo due to the RF pulse is expected to occur. Accordingly, control difficulties for synchronizing the RF pulse and the slicing magnetic field and shifting them by the same time length is avoided wherein two chemical shifts can be separated.
4966583 APPARATUS FOR LOCATING BREAST MASS
A
Elie Debbas A mass localization device includes a catheter and a needle. The catheter includes inner and outer walls spaced from each other and creating a gap between the walls extending along substantially the entire length of the catheter. The distal portion of the outer wall includes an inflatable balloon. A port extension member is provided at the proximal end of the catheter for communicating a supply of air to the inflatable balloon via the gap between the inner and outer walls of the catheter. The needle is insertable through the catheter to extend beyond the distal ’ end of the catheter. In use, the combination of the needle and catheter are inserted into body tissue. Under assistance of x-ray radiography, the
4965726 CT SCANNE:R WITH SEGMENTED DETECTOR ARRAY Dominic J Heuscher, Rodney Mattson assigned to Picker Interuational Inc I
Pergamon
Medical Imaging and Graphics, Vol. 18, No. 1, pp. I-IV, 1994 Copyright 0 1994 Elswier Science Ltd Printed in the USA. All rights reserved 0895-611 l/94 $6.00 + .oO
NEW PATENTS
This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH@online database in accordance with interest profiles developed hy the Editors. Further information about Pergamon PATSEARCH@ can he obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102, U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Perganion Orbit InfoLine only.
4965520
A plurality of segmented radiation sensitive arrays (30) receive radiation from a radiation source (16) which has transversed an examination region (14) of a CT scanner (10). Each array includes a plurality of rows (A, B, C) of radiation sensitive cells, e.g. photodiodes, which produce an electrical signal indicative of the intensity of radiation received. Within each of the rows, there are larger cells and smaller cells. The electrical signals from each of the plurality of cells within each row are serialized (34) and amplified (36A, 36B, 36C). Selected combinations of the electrical signals from the various rows and larger and smaller elements within each row are combined (46) and reconstructed (50) into an image representation (52) for display on a video monitor or the like.
MAGNETIC RESONANCE IMAGING METHOD Hidenobu Sakamoto, Amagasaki, Japan assigned to Mitsubishi Denki Kabushiki Kaisha In an NMR imagmg method, the phase encode amount applied to the respective echo signals in the same sequence of operation are made to have different values and the phase encoding magnetic fields Gen are made to disorder the phases of the NMR signals so as not to generate stimulated echo signals. In another aspect, the time periods of application of the signal reading magnetic field Gp applied between the 90 degrees RF pulse and the 180 degrees RF pulse are made to have different values equal in number to the chemical shifts. By varying the time period of application of the signal reading magnetic field, spin echo signals having different phase variance amounts due to the different chemical shifts are generated before or after the time point at which the spin echo due to the RF pulse is expected to occur. Accordingly, control difficulties for synchronizing the RF pulse and the slicing magnetic field and shifting them by the same time length is avoided wherein two chemical shifts can be separated.
4966583 APPARATUS FOR LOCATING BREAST MASS
A
Elie Debbas A mass localization device includes a catheter and a needle. The catheter includes inner and outer walls spaced from each other and creating a gap between the walls extending along substantially the entire length of the catheter. The distal portion of the outer wall includes an inflatable balloon. A port extension member is provided at the proximal end of the catheter for communicating a supply of air to the inflatable balloon via the gap between the inner and outer walls of the catheter. The needle is insertable through the catheter to extend beyond the distal ’ end of the catheter. In use, the combination of the needle and catheter are inserted into body tissue. Under assistance of x-ray radiography, the
4965726 CT SCANNE:R WITH SEGMENTED DETECTOR ARRAY Dominic J Heuscher, Rodney Mattson assigned to Picker Interuational Inc I