- Email: [email protected]
5424643 Magnetic resonance gradient sheet coils
X
New Patents
PCT No. PCT/JP92/00735 Sec. 371 Date Feb. 11, 1993 Sec. 102(e) Date Feb. 11, 1993 PCT Filed Jun. 8, 1992 PCT Pub. No. WO92/22586 PCT Pub. Date Dec. 23, 1992. An oxidized complex comprising a water-soluble carboxypolysaccharide and magnetic iron oxide, which is characterized by being obtained by oxidizing a complex comprising a water-soluble carboxypolysaccharide and magnetic iron oxide. Said oxidized complex has very low toxicity,, is very stable, exhibits little or no blood pressurereducing action and has low plateletsaggregating action when administered directly into the blood vessels of animals, and is useful in medical fields such as contrast medium for magnetic resonance imaging, exothermic medium for hyperthermia and the like.
5424643 MAGNETIC GRADIENT
RESONANCE SHEET COILS
Morich Michael A; Patrick John; DeMeester Gordon D Mentor, OH, UNITED STATES Assigned to Picker International Inc A magnetic resonance imaging machine includes a toroidal vacuum dewer (24) which contains a superconducting magnet (10). A radio frequency coil (32) is mounted within a cylindrical bore (26) of the vacuum dewer. A cylindrical, dielectric former (46) supports an RF shield (34), a z-gradient coil (50), an x-gradient coil (52), and a y-gradient coil (54). The x and ygradient coils are each composed of four like spiral coil constructions. A metallic layer is cut with cut lines (64) to define a generally spiral coil winding pattern. In a high current density region (68) in which the coil windings are narrower than a preselected width, the cut lines (76) are thinner. In lower current density regions (70), the cut lines (78) are thicker. In lower current density regions, two cut lines are defined between adjacent coil windings such that the coil windings are limited to a maximum width. Conductive islands (80) defined in the lower current density areas which are large enough to support detrimental eddy currents are preferably removed or at least modified such that their ability to support detrimental eddy currents is curtailed.
5424644 PROBEHEAD FOR THE MEASURING OF MAGNETIC RESONANCE Zeiger Heinz Waldbronn, Assigned to Bruker Analytische GmbH
GERMANY Messtechnik
A probehead is described for carrying out magnetic resonance imaging measurements on a sample. The sample is located inside a probehead transmission/detection unit in a magnetic field of a predetermined direction. Moreover, the sample may be turned relative to the direction about at least one axis. The transmission/detection unit is a split ring resonator. The split ring resonator may be turned about its resonator axis and may be coupled by coupling means for coupling rf energy to or from, respectively, the split ring resonator. The coupling means are arranged in a stationary position relative to the split ring resonator and are coaxial to the resonator axis.
5424645 DOUBLY BROADBAND TRIPLE RESONANCE OR QUAD RESONANCE NMR PROBE CIRCUIT Doty F David Columbia, SC, UNITED STATES Assigned to Doty Scientific Inc A single NMR sample coil of inductance LS, in series with a mid-frequency (MF) tuning inductor grounded at one end, is doubly broadbanded using a first high-voltage broadband capacitor matching network in series with the two coils for the LF tuning and a second high-voltage broadband capacitor matching network connected to the junction between the two coils for the MF tuning. Isolation between the MF and LF ports is achieved by proper choice of a plug-in isolation capacitor between the two broadband matching networks. An inductively coupled floating HF tank circuit is inserted in series with one of the leads from the sample coil to produce the triple resonance circuit. The tuning elements for this HF tank are mounted on top of the adjacent broadband matching network. A second floating HF tank circuit may be inserted in series with the other lead from the sample coil to produce a balanced-HF triple resonance circuit or an
New Patents
PCT No. PCT/JP92/00735 Sec. 371 Date Feb. 11, 1993 Sec. 102(e) Date Feb. 11, 1993 PCT Filed Jun. 8, 1992 PCT Pub. No. WO92/22586 PCT Pub. Date Dec. 23, 1992. An oxidized complex comprising a water-soluble carboxypolysaccharide and magnetic iron oxide, which is characterized by being obtained by oxidizing a complex comprising a water-soluble carboxypolysaccharide and magnetic iron oxide. Said oxidized complex has very low toxicity,, is very stable, exhibits little or no blood pressurereducing action and has low plateletsaggregating action when administered directly into the blood vessels of animals, and is useful in medical fields such as contrast medium for magnetic resonance imaging, exothermic medium for hyperthermia and the like.
5424643 MAGNETIC GRADIENT
RESONANCE SHEET COILS
Morich Michael A; Patrick John; DeMeester Gordon D Mentor, OH, UNITED STATES Assigned to Picker International Inc A magnetic resonance imaging machine includes a toroidal vacuum dewer (24) which contains a superconducting magnet (10). A radio frequency coil (32) is mounted within a cylindrical bore (26) of the vacuum dewer. A cylindrical, dielectric former (46) supports an RF shield (34), a z-gradient coil (50), an x-gradient coil (52), and a y-gradient coil (54). The x and ygradient coils are each composed of four like spiral coil constructions. A metallic layer is cut with cut lines (64) to define a generally spiral coil winding pattern. In a high current density region (68) in which the coil windings are narrower than a preselected width, the cut lines (76) are thinner. In lower current density regions (70), the cut lines (78) are thicker. In lower current density regions, two cut lines are defined between adjacent coil windings such that the coil windings are limited to a maximum width. Conductive islands (80) defined in the lower current density areas which are large enough to support detrimental eddy currents are preferably removed or at least modified such that their ability to support detrimental eddy currents is curtailed.
5424644 PROBEHEAD FOR THE MEASURING OF MAGNETIC RESONANCE Zeiger Heinz Waldbronn, Assigned to Bruker Analytische GmbH
GERMANY Messtechnik
A probehead is described for carrying out magnetic resonance imaging measurements on a sample. The sample is located inside a probehead transmission/detection unit in a magnetic field of a predetermined direction. Moreover, the sample may be turned relative to the direction about at least one axis. The transmission/detection unit is a split ring resonator. The split ring resonator may be turned about its resonator axis and may be coupled by coupling means for coupling rf energy to or from, respectively, the split ring resonator. The coupling means are arranged in a stationary position relative to the split ring resonator and are coaxial to the resonator axis.
5424645 DOUBLY BROADBAND TRIPLE RESONANCE OR QUAD RESONANCE NMR PROBE CIRCUIT Doty F David Columbia, SC, UNITED STATES Assigned to Doty Scientific Inc A single NMR sample coil of inductance LS, in series with a mid-frequency (MF) tuning inductor grounded at one end, is doubly broadbanded using a first high-voltage broadband capacitor matching network in series with the two coils for the LF tuning and a second high-voltage broadband capacitor matching network connected to the junction between the two coils for the MF tuning. Isolation between the MF and LF ports is achieved by proper choice of a plug-in isolation capacitor between the two broadband matching networks. An inductively coupled floating HF tank circuit is inserted in series with one of the leads from the sample coil to produce the triple resonance circuit. The tuning elements for this HF tank are mounted on top of the adjacent broadband matching network. A second floating HF tank circuit may be inserted in series with the other lead from the sample coil to produce a balanced-HF triple resonance circuit or an