Abstract: An object is to correct a magnetic field caused by an eddy current, which is generated due to application of a gradient magnetic field, not only in the application direction of the gradient magnetic field but also in a direction different from the application direction of the gradient magnetic field. In the present invention, in order to achieve this object, a compensation magnetic field which compensates for an eddy current magnetic field generated in each of an application direction of a test gradient magnetic field and a direction different from the application direction in each direction is calculated using the test gradient magnetic field. When generating an arbitrary gradient magnetic field, a compensation magnetic field which compensates for an eddy current magnetic field according to application of an arbitrary gradient magnetic field on the basis of the measured eddy current magnetic field in each direction is generated together with the arbitrary gradient magnetic field.

Abstract: A golf club 2 is provided with a head 4, a shaft 6, and a ferrule 8. The head 4 has a hosel hole 22. The hosel hole 22 has a large-diameter part 24 and a small-diameter part 26. The ferrule 8 has a base part 30 interposed between the large-diameter part 24 and the shaft 6. The large-diameter part 24 is disposed coaxially with the small-diameter part 26. The shaft 6 has a tip end surface 40 disposed in the small-diameter part 26. The large-diameter part 24 has an axial directional length longer than that of the small-diameter part 26. Preferably, the base part 30 has an end surface 52 separated from the bottom surface 54 of the large-diameter part 24. Preferably, an adhesive v1 is disposed in an enclosed part 62 defined by the end surface 52 of the base part 30, the bottom surface 54 of the large-diameter part 24, the outer peripheral surface 58 of the shaft 6, and the inner peripheral surface 60 of the large-diameter part 24. The shaft 6 and the large-diameter part 24 are bonded by the adhesive v1.

Abstract: A magnetic resonance imaging device includes magnetic field generating means and control means for controlling receiving means according to a predetermined pulse sequence, the predetermined pulse sequence including an unnecessary material suppressing sequence unit for canceling a signal from an unnecessary material which is not a measurement target and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit.

Abstract: A magnetic resonance imaging device includes control means for controlling receiving means according to a predetermined pulse sequence that includes an unnecessary material suppressing sequence unit for suppressing a signal from an unnecessary material which is not a measurement target, and a main imaging sequence unit for measuring a nuclear magnetic resonance signal used to create an image of an examinee. The unnecessary material suppressing sequence unit generates at least two or more high frequency magnetic field pulses so that the longitudinal magnetization of the unnecessary material is made spatially uniform in the imaging space under application of a first high frequency magnetic field pulse in the main imaging sequence unit.

Abstract: An aldehyde derivative represented by the general formula (2) is reacted with ketene in the presence of a Lewis acid catalyst to produce a novel 2-oxetanone derivative (1), which is then purified to a 2-oxetanone derivative having a high trans-isomer purity, and then converted to a vinyl derivative (3) through decarboxylation reaction.

Abstract: There is provided a coil unit having a large region of homogeneous sensitivity for the axial direction even with a shortened rung length of birdcage type RF coil. The coil unit comprises a gradient coil which is disposed along a static magnetic field generating source, and a radio frequency coil which is disposed along the gradient coil in a test region at a position closer to the center of the test region compared with the gradient coil, and a conductor part which is disposed between the gradient coil and the radio frequency coil, and covers periphery of the radio frequency coil. The radio frequency coil comprises a first loop coil and a second loop coil locating in planes substantially perpendicular to direction of the static magnetic field, a plurality of linear conductors connecting the first loop coil and the second loop coil and substantially parallel to the direction of the static magnetic field, and a plurality of first capacitors disposed in the first loop coil and the second loop coil.

Abstract: A golf club 2 is provided with a head 4, a shaft 6, a grip body 8a, and an extending member 8b. The extending member 8b is detachably mounted to a back end of the grip body 8a. A length of a grip holding surface 8m can be adjusted by mounting and dismounting the extending member 8b. Preferably, the grip body 8a has a hard base body h1. Preferably, the extending member 8b has a hard connector h2. Preferably, the extending member 8b can be mounted to the back end of the grip body 8a by connecting the hard base body h1 and the hard connector h2 to each other. The number of the extending member 8b may be 1 or equal to or greater than 2. Preferably, the extending members are detachably mounted to each other.

Abstract: A golf club (2) includes a head (4), a shaft (6) and a grip (8). An elastic member (10) is attached to an external surface of the shaft (6). The elastic member (10) is ring-shaped and has no end. The elastic member (10) is externally fitted in the shaft (6) in a state in which an elastic contracting force is maintained. It is preferable that a fastening member for fastening the elastic member (10) from an outside should be provided. The fastening member is constituted to enable a mutual transition of a fastening state in which the elastic member is fastened and a removing state in which the fastening member is removed from the elastic member and is also removed from the golf club. It is preferable that the fastening member should be provided in no contact with the shaft (6) in the fastening state.

Abstract: In the diffusion-weighted imaging, amounts of distortion and amounts of phase offset of k-space data due to a temporally changing magnetic field error induced by eddy currents and vibrations associated with application of a diffusion-weighted gradient magnetic field pulse are corrected with good precision to improve image quality. Characteristic data for correcting distortion of k-space data are calculated for every position in the slice direction as peak shifts of projections observed between the cases of applying and not applying an MPG pulse. As the characteristic data, amounts of distortion in the read-out direction and the phase encoding direction and phase offset amounts in a slice plane are calculated.

Abstract: Disclosed is an oil-and-fat composition having a high ?-linolenic acid content, a hypertension-ameliorating effect, a good flavor, and good storage stability. Also disclosed is a food or beverage containing the oil-and-fat composition. The oil-and-fat composition comprises at least one plant oil A selected from flax oil, perilla oil and perilla seed oil, rice oil, and at least one plant oil B selected from rape seed oil, soybean oil and corn oil at a ratio among the plant oil A, rice oil and the plant oil B [i.e., a (plant oil A)/(rice oil)/(plant oil B) ratio] of 20-35/15-25/40-65 by mass, wherein the ?-linolenic acid content in the constituent fatty acids contained in the oil-and-fat composition is 15 to 30 mass %.

Abstract: In a superconducting magnet, including a vacuum vessel, a coil vessel inside the vacuum vessel, and a superconducting coil inside the coil vessel for generating a magnetic field, has a magnetic member, disposed inside the vacuum vessel, supported with thermal insulation, for compensating the magnetic field; a heat exchange device disposed outside the vacuum vessel for supplying to or absorbing heat from the vacuum vessel; and thermal conducting members thermally connecting the heat exchange device via the vacuum vessel to the magnetic member. An MRI including the superconducting magnet is also disclosed.

Abstract: An MRI apparatus capable of selecting an optional direction as a phase encoding direction and achieving a preferable S/N, when an imaging time shortening technique is applied. A receiver coil, used as a receiver coil of a vertical magnetic field MRI apparatus, is a combination of a first coil (solenoid coil) forming a current loop around the outer circumference of a test object, second coils forming even-numbered current loops, and third coils forming odd-numbered current loops, in the direction intersecting the plane of the current loop of the first coil. The second coil and the third coil are arranged in such a manner that, as for the current loops in the array direction thereof, a position where a sensitivity of one coil is minimized approximately coincides with a position where the sensitivity of the other coil is maximized, whereby electromagnetic coupling is suppressed.

Abstract: Disclosed is an edible oil which is hardly deteriorated by oxidation and therefore has excellent storage stability. Also disclosed is a method for producing the edible oil. A nitrogen gas in the form of nanobubbles each having a diameter of less than 1000 nm (1 ?m) and microbubbles each having a diameter of 1 to 350 ?m (inclusive) is added to an edible oil. In this manner, it becomes possible to produce an edible oil having a content of nitrogen in the oil or a content of dissolved nitrogen in the oil of 4.5% (by volume) or more and an edible oil containing nitrogen nanobubbles each having a diameter of less than 1000 nm (1 ?m) and nitrogen microbubbles each having a diameter of 1 to 350 ?m (inclusive).

Abstract: An MRI apparatus excellent in magnetic field generation efficiency is provided. According to this invention, a main coil (52) of a gradient magnetic field coil (13) is partially recessed to reduce the total thickness of a radio-frequency coil (11) and a gradient magnetic field coil (13). That is, the main coil (52) is designed in a tubular shape, and the diameter r1 at the center portion of the imaging space is larger than the diameter r2 of the main coil end portion. Accordingly, the RF coil (11) can be disposed to be near to the gradient magnetic field coil (13) side without lowering the magnetic field generation efficiency.

Abstract: The present invention provides a magnetic resonance imaging system capable of performing spectrum measurement even when a magnetic resonant frequency changes during MRS measurement. A time-varying rate of a water magnetic resonant frequency is measured in advance before the MRS measurement. The amount of change in water magnetic resonant frequency during the MRS measurement is predicted from the measured time-varying rate. With the predicted value as the reference, a transmission frequency of an RF magnetic field irradiated in a signal suppression pulse sequence, a transmission frequency of an RF magnetic field for excitation and inversion and a received frequency at the detection of a magnetic resonance signal in a sequence of the MRS measurement are respectively set. A high-precision spectrum measurement is hence enabled.

Abstract: A shaft of the present invention has a tip reinforcing layer. A prepreg s9 for the tip reinforcing layer has a portion having a larger circumferential direction width Ws toward a tip side. The prepreg s9 for the tip reinforcing layer has a thickness Pt of 0.06 mm or greater and 0.12 mm or less. An edge Ds of the tip reinforcing layer extends in an axial direction of the shaft while circulating in a circumferential direction of the shaft. When a height h1 of the edge Ds at a position placed apart from a tip by 60 mm is defined as h11; the height h1 at a position placed apart from the tip by 120 mm is defined as h12; the height h1 at a position placed apart from the tip by 180 mm is defined as h13; the height h1 at a position placed apart from the tip by 240 mm is defined as h14; and the height h1 at a position placed apart from the tip by 300 mm is defined as H15, an average value Ha of the five heights h11 to h15 is equal to or less than 0.03 mm.

Abstract: An RF coil is provided with a hollow-shaped outer conductive element and strip-shaped conductive elements disposed along the outer conductive element in the axial direction. The strip-shaped conductive elements are disposed with uneven intervals to secure an internal space at a position where the strip-shaped conductive elements are not disposed. In order to obtain uniform sensitivity at the center section of the RF coil, the strip-shaped conductive elements and the outer conductive element are electrically connected via capacitors of which capacitances are adjusted so that a magnetic field component perpendicular to the center axis should be generated at a desired resonance frequency, and the strip-shaped conductive elements are axisymmetrically disposed with respect to the center axis of the outer conductive element. As a result, a comfortable examination space in a tunnel type MRI apparatus is achieved without increasing the manufacturing cost of the MRI apparatus.

Abstract: A magnetic resonance imaging apparatus capable of suppressing noise caused by vibration of a gradient magnetic field coil and improving image quality includes a large number of ferromagnetic shims disposed in a large number of holes formed in a shim tray, and vibration dampers disposed in holes formed in the shim tray to reduce noise generated by vibration of a gradient magnetic field generating coil.