专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH04194766A DEVICE AND METHOD FOR EVALUATING QD PROBE 失效
公开(公告)号：JPH04194766A
公开(公告)日：1992-07-14
申请号：JP32314890
申请日：1990-11-28
申请人： HITACHI LTD
发明人： HAMAZAKI FUMIHISA , ISHIZUKA TOSHIHIRO , YABUSAKI YUKIO , SHIMIZU TAKAYUKI
IPC分类号： G01R33/00 , A61B5/055 , G01R33/28 , G01R33/32
摘要： PURPOSE:To dispense with complicated adjustment between coils and to enable accurate measurement of an RF magnetic field of a QD probe by a construction wherein the number of element coils constructing a pickup coil is reduced to one. CONSTITUTION:Fine adjustment can be executed by moving an angle rod 21 in the rotational direction 10 in the shape of circular-arc by tightening only a pickup coil support rod screw A 14. On the occasion of measurement of data, a pickup coil support rod screw B 15 is tightened, in addition, and thereby the angle in the rotational direction 10 of a pickup coil 12 is fixed. On the other hand, a disk 16 marked with angles is fixed to the fore end of a pickup coil support rod 13, and the angle of the coil 12 can be read by an angle plate 17 which is always directed downward by a weight. By a gain analyzer 21 having both functions of amplification and display of a reception signal, an RF current is supplied to a QD probe 2, the reception signal from the coil 12 is amplified and a gain of the reception signal is displayed.

2. 发明专利

JPH05228126A RF COIL EVALUATING METHOD 失效
公开(公告)号：JPH05228126A
公开(公告)日：1993-09-07
申请号：JP3178292
申请日：1992-02-19
申请人： HITACHI LTD
发明人： HAMAZAKI FUMIHISA , ISHIZUKA TOSHIHIRO , YABUSAKI YUKIO , SHIMIZU TAKAYUKI
IPC分类号： A61B5/055 , G01R33/28 , G01R33/32
摘要： PURPOSE:To evaluate an RF coil single material by using not only an absolute value of a pickup coil signal but also a phase, in the method for evaluating an image homogeneous degree by measuring a magnetic field distribution in a load phantom, of the RF coil having the load phantom. CONSTITUTION:In the inside of a cylindrical GC bobbin 1 having a conductive mesh on a side wall, a cylindrical RF coil 2 is installed, and in the inside of this RF coil 2, a load phantom 3 is placed. In such a state, by a gain analyzer 21, an RF current is supplied to the RF coil 2, a receiving signal from a pickup coil 12 is amplified, and gain of the receiving signal is displayed. To the tip of a pickup coil supporting bar 13 to which the pickup coil 12 is fixed, a disk 16 for memorizing an angle is fixed, so that an angle of the pickup coil 12 can be read through an angle 17 which is hung downward. In such a state, by rotating the supporting bar 13, and using an absolute value and a phase of a signal measured in plural rotational positions, the RF coil is evaluated.

3. 发明专利

JPH04292140A INSPECTING DEVICE USING NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPH04292140A
公开(公告)日：1992-10-16
申请号：JP5631791
申请日：1991-03-20
申请人： HITACHI LTD
发明人： ISHIZUKA TOSHIHIRO , HAMAZAKI FUMIHISA , SHIMIZU TAKAYUKI
IPC分类号： A61B5/055 , G01R33/32 , G01R33/36
摘要： PURPOSE:To improve the sensitivity of a photographing image by realizing the non-adjustment of a phase synthesizer, improving its accuracy, and making it stable and compact, with regard to the phase synthesizer of a QD coil of a nuclear magnetic resonance device for obtaining a tomographic image and a spectrum of a specific part of a body to be examined. CONSTITUTION:The device consists of a structure in which a QD coil having two pairs of orthogonal coils and a phase synthesizer are formed integrally. The phase synthesizer can be realized by a rat race circuit 17. The winding way does not form a loop so as not to receive an induced noise, and a multi- wire distributing board is constituted by using a multi-wire. In such a way, a substrate converted rat race circuit 18 is constituted.

4. 发明专利

JPH03120445A AUTOMATIC FLUORESCENCE INTENSITY MEASURING INSTRUMENT 失效
公开(公告)号：JPH03120445A
公开(公告)日：1991-05-22
申请号：JP25794289
申请日：1989-10-04
申请人： HITACHI LTD
发明人： HASHIMOTO HIROSHI , UMETSU HIROSHI , HAMAZAKI FUMIHISA
IPC分类号： G01N21/64
摘要： PURPOSE:To efficiently automate calibration and to make continuous measure ment by measuring and storing the fluorescence intensity of a reference sample, automatically setting the luminous intensity of a reference light source by refer ring to this value and calibrating the characteristics of a fluorescence detector from this intensity. CONSTITUTION:The fluorescence emitted by the reference sample 261 is made incident to the fluorescence detector (photomultiplier) 32 and the fluorescent output component thereof is stored in a memory 106. For example, an LED is used for the light source 29. A subtractor 108 subtracts the same output to the sample 261 stored in the memory 106 from the output of the detector 32 to the light source 29 and inputs the result thereof to the power source 107 to control the quantity of the light emitted by the light source 29. The output of the detector 32 to the light source 29 is made equal to the same output as to the sample 261 and, therefore, if the luminance of the light source 29, i.e., the voltage of the power source 107 is fixed in this state, the light source 29 can thereafter be used as a reference light source in place of the sample 261. The fluctuation in the sensitivity of the detector 32 is, therefore, rapidly and automatically compensated by the reference light source 29.

5. 发明专利

JP2585740B2 失效
公开(公告)号：JP2585740B2
公开(公告)日：1997-02-26
申请号：JP21074088
申请日：1988-08-26
申请人： HITACHI LTD
发明人： HAMAZAKI FUMIHISA , BETSUI HAJIME , IMAI KYOKO , UMETSU HIROSHI
IPC分类号： B01F11/00 , B01F13/08 , G01N21/25 , G01N35/00 , G01N35/02 , G01N35/04 , G01N35/10

6. 发明专利

JPH0556948A INSPECTING DEVICE USING NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPH0556948A
公开(公告)日：1993-03-09
申请号：JP21959991
申请日：1991-08-30
申请人： HITACHI LTD
发明人： ISHIZUKA TOSHIHIRO , HAMAZAKI FUMIHISA , SHIMIZU TAKAYUKI
IPC分类号： A61B5/055 , G01N33/38 , G01R33/38 , G01R33/381 , G01R33/385
摘要： PURPOSE:To provide a structure which retains the shape as a coil and can be curved by bonding a copper plate to a 'Teflon(R)' plate by using 'Teflon(R)' of a melting type, then constituting a coil pattern by etching. CONSTITUTION:An electrode constituting inductance is formed of the copper plate having about 0.2mm thickness and the surface thereof is coated with the foamed 'Teflon(R)' in the coil part 1 of a detector. The potential of the electrode is dropped and the loss by the floating capacity with a patient is decreased by dividing inductances 4, 5, 6, 7 by capacitors 8, 9, 10. The capacitors 8, 9, 10 are constituted by attaching the electrode 5 of the copper plate to the 'Teflon(R)' 11 and inserting the thin 'Teflon(R)' 12 between the electrode 5 and the electrode 6. The electrode 6 is coated with the 'Teflon(R)' 13 and the capacitor is formed of the electrodes 5 and 6. The capacity of the capacitors is determined by the thickness and dielectric constant of the 'Teflon(R)' 12 and the superposed areas of the electrode plates 5, 6. The constant of the divided capacitors is determined by selecting these at adequate conditions.

7. 发明专利

JPH04170940A PROBE OF MAGNETIC RESONANCE EXAMINING DEVICE 失效
公开(公告)号：JPH04170940A
公开(公告)日：1992-06-18
申请号：JP29730590
申请日：1990-11-05
申请人： HITACHI LTD
发明人： ISHIZUKA TOSHIHIRO , TSUDA MUNETAKA , YABUSAKI YUKIO , HAMAZAKI FUMIHISA , SHIMIZU TAKAYUKI
IPC分类号： A61B5/055 , G01R33/34
摘要： PURPOSE:To easily execute the fine adjustment for taking orthogonality in a short time, and also, to improve the uniformity of a high frequency magnetic field distribution in a probe by forming integrally a wind and a guard ring of two pairs of probe coils, moving them in the peripheral direction of a probe bobbin, and rotating the center shafts of the pair of probe coils. CONSTITUTION:While confirming the isolation of an electric characteristic of each pair of probe coils, the vertical 1 and wings 21, 25 being an integral structure are moved in parallel in the peripheral direction of a probe bobbin. According to this method, the orthogonality can be adjusted in a state that the inductance constituted of the vertical and the wing of each pair of probe coils, and the capacitance constituted between the wing and the guard ring are constant. Therefore, each pair of probe coils is resonated by almost the same inductance and capacitance, and constitutes a QD probe whose symmetric property is satisfactory electrically. Accordingly, a generated high frequency magnetic field distribution has a satisfactory symmetric property and becomes uniform. Also, a guide groove is provided so that the wings 21, 25 and the vertical 1 can move in parallel in the peripheral direction of the probe bobbin.

8. 发明专利

JPH03255938A AUTOMATIC FLUOROMETRY INSTRUMENT 失效
公开(公告)号：JPH03255938A
公开(公告)日：1991-11-14
申请号：JP5365890
申请日：1990-03-07
申请人： HITACHI LTD
发明人： HAMAZAKI FUMIHISA , UMETSU HIROSHI , HASHIMOTO HIROSHI
IPC分类号： G01N21/64 , G01N35/02
摘要： PURPOSE:To smooth the stirring of liquid and to make fluorometry with high reproducibility by forming a vessel of a material having a refractive index approximate to the refractive index of a liquid to be inspected and forming the side wall of the vessel existing in the opposite position of an exit window in such a manner that the inside surface side curves and the outside surface side is plane. CONSTITUTION:The reaction vessel 2 disposed on a reaction table is formed a material which is light transparent and has the refractive index approximate to the refractive index of the liquid to be inspected, for example, an acrylic resin. In addition, the outside surface 42 of the fluorescence exit window 41 is formed plane and the inside surface 43 is formed to the plane parallel with the outside surface 42. On the other hand, the inside surface 45 corresponding to the outside surface 44 is curved at the curvature similar to the curvature of the other inside surface part of the vessel 2. A ball 3 moves rotationally along the inside surface of the wall of the vessel 2 and stirs the liquid to be inspected when the vessel 2 is oscillation in a horizontal direction. The fluorescence generated from the liquid to be inspected when the vessel 2 exists in a photometric position is taken out of the exit window 41 and is observed. The light is reflected even by the side wall of the vessel 2 on generation of this fluorescence and the reflection at the boundary between the liquid to be inspected and the inside surface 45 increases. Since the outside surface 44 is plane, this reflected light 46 is directed toward the window 41.

9. 发明专利

JPH05293093A 失效
公开(公告)号：JPH05293093A
公开(公告)日：1993-11-09
申请号：JP9927692
申请日：1992-04-20
申请人： HITACHI LTD
发明人： HAMAZAKI FUMIHISA , ISHIZUKA TOSHIHIRO , SHIMIZU TAKAYUKI
IPC分类号： A61B5/055 , G01R33/32 , G01R33/36
摘要： PURPOSE:To improve accommodation of patients and operability of an RF coil along with a smaller size and a lighter weight of the RF coil by separating a coil part from an electronic circuit part in the RF coil used in an MRI apparatus. CONSTITUTION:RF coil of this invention is made up of a coil section (1), a circuit section (5), a coaxial cable (4) for connecting both the parts and a BNC connector (6) for connecting the circuit section (5) to a preamplifier. Moreover. the coil (1) comprises a metal part (2) and a base material (3) for holding the above metal part (2). The coaxial cable (4) has a matching of a wavelength given as a multiple of integer of a half of the wavelength corresponding to the frequency of an NMR signal.

10. 发明专利

JPH04170939A EXAMINING DEVICE USING NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPH04170939A
公开(公告)日：1992-06-18
申请号：JP29730790
申请日：1990-11-05
申请人： HITACHI LTD
发明人： YABUSAKI YUKIO , SHIMIZU TAKAYUKI , ISHIZUKA TOSHIHIRO , HAMAZAKI FUMIHISA , TSUDA MUNETAKA
IPC分类号： A61B5/055 , G01R33/34
摘要： PURPOSE:To raise the self-resonance frequency in accordance with a high magnetic field even in the case a coil shape is large by placing a first inside cylindrical bobbin in which a guard ring is printed on the outside surface of the bobbin, and a second outside cylindrical bobbin in which a wing and an arm are printed on the inside surface of the bobbin so that the center axes become the same. CONSTITUTION:On the outside of an inside cylindrical bobbin 108, guard ring electrodes 131, 132 are printed, and on the inside of an outside cylindrical bobbin 109, wing electrodes 121, 122, 123, 124, 125, 126, 127, and 128, and arm electrodes 111, 112 are printed. By supporting 151, 161, 171, 152, 162 and 172, an interval of the inside cylindrical bobbin 108 and the outside cylindrical bobbin 109 is held constant. In order to make a dielectric constant between the wing and the guard ring small, air is used, and also, a distance is enlarged. A gap of the wing and the guard ring becomes an air layer, therefore, thickness becomes about 1/2-1/3, comparing with the case of Teflon, and it becomes a coil for belly having no thickness by which a capacity error of a capacitance becomes a problem. Also, since the gap is the air layer, it does not cause an increase of weight, and a light coil for belly is obtained.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式