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1. 发明专利

JP2002008583A MASS SPECTROMETER 失效
公开(公告)号：JP2002008583A
公开(公告)日：2002-01-11
申请号：JP2000192648
申请日：2000-06-22
申请人： HITACHI LTD
发明人： TOMIOKA MASARU , ISHIZUKA TOSHIHIRO , MIMURA TADAO , HIRABAYASHI YUKIKO
IPC分类号： G01N27/62 , G01N30/72 , H01J49/04 , H01J49/06 , H01J49/10
摘要： PROBLEM TO BE SOLVED: To provide an mass spectrometer which reduces adverse effects of neutral particles or charged droplets by dry gas. SOLUTION: With a mass spectrometer provided with an ion source which ionizes eluate from liquid chromatograph at an atmosphere and a mass spectrometry part which carries out mass spectrometry on ion under high vacuum generated by the ion source, the ion source is provided with a spray means for spraying the eluate, an exhaust nozzle formed so as to cover the spray means and supplying heated gas from the direction opposite to spraying direction of discharge liquid, a throttling plate for throttling gas flow around the exhaust nozzle, and a case furnished with a through-hole for exhausting ion toward the mass spectrometry part.

2. 发明专利

JPH1173910A MASS SPECTROMETER 失效
公开(公告)号：JPH1173910A
公开(公告)日：1999-03-16
申请号：JP23576097
申请日：1997-09-01
申请人： HITACHI LTD
发明人： SAKAIRI MINORU , MIMURA TADAO , ISHIZUKA TOSHIHIRO , TOMIOKA MASARU , TAKADA YASUAKI , NABESHIMA TAKAYUKI
IPC分类号： G01N27/62 , H01J49/42
摘要： PROBLEM TO BE SOLVED: To prevent stray ions or minute droplets from reaching an ion detector, and to effectively suppress the increase in random noise by arranging a conductive shielding member for extinguishing the stray ions and minute droplets on at least one of the ion-emitting side vicinity and incident-side vicinity of a mass analyzer part. SOLUTION: A conductive shielding member 22a is arranged on the ion emitting-side vicinity of an ion-trap mass analyzer part within a chamber. Therefore, stray ions or charged minute droplets carried thereto is extinguished through a process of collision and neutralization with the shielding member 22a without reaching the conversion dynode of an ion detector 14, so that the increase in random noise and reduction in S/N ratio of a signal can be prevented effectively. As the shielding member 22a, a stainless steel-made mesh- like plate having an opening at the center is used. The mesh-like plate is manufactured by chemically etching a stainless steel plate.

3. 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.

4. 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.

5. 发明专利

JPH0274235A MRI IMAGE DIAGNOSTIC APPARATUS 失效
公开(公告)号：JPH0274235A
公开(公告)日：1990-03-14
申请号：JP22467188
申请日：1988-09-09
申请人： HITACHI LTD
发明人： OTSUKA MASAYUKI , TSUDA MUNETAKA , ISHIZUKA TOSHIHIRO
IPC分类号： A61B5/055
摘要： PURPOSE:To inexpensively arrange a system and to obtain an image having a high S/N ratio by bonding an electromagnetic wave shield material to the whole of the wall surface surrounding a high frequency irradiation coil and closing one end of a magnet opening part by the electromagnetic wave shield material. CONSTITUTION:For example, a metal net 9 composed of a non-magnetic conductive material is bonded to the entire periphery of the inner cylinder of an inclined magnetic field coil 2 to be connected to the earth of a detection coil 4. The magnet opening part on the side opposite to the entry and exit of an examinee 5 is closed by the metal net 10 in continuity relation to the metal net 9. The examinee 5 is covered with the blanket 6 having a metal net woven therein connected to the earth of the detection coil 4 and not only the invasion of foreign noise in the detection coil 4 but also the noise emitted from both of a magnet and the inclined magnetic field are prevented.

6. 发明专利

JPH024335A MAGNETIC RESONANCE CHECKING DEVICE 失效
公开(公告)号：JPH024335A
公开(公告)日：1990-01-09
申请号：JP15233188
申请日：1988-06-22
申请人： HITACHI LTD
发明人： ARITOMI TOSHIAKI , CHITOKU KAZUO , ISHIZUKA TOSHIHIRO
IPC分类号： A61B5/0245 , A61B5/02 , A61B5/05 , A61B5/055 , G01N24/08 , G01R33/48
摘要： PURPOSE:To obtain the picture of satisfactory contrast by executing the excitement of a spin and signal collection in each synchronizing period calculated based on a repeating time, for which condition setting is executed in advance. CONSTITUTION:When a synchronizing signal generating means 51 inputs an electro-cardiac waveform 50 and outputs a signal to be synchronized to the waveform, a clock generating means 53 generates a reference clock. A counting means 54 inputs a signal from a signal generating means 51 and counts the clock number of the reference clock and a measuring heartbeat period is operated. A CPU52 inputs the operation ending signal of the heartbeat period and executes the comparison command between the measuring heartbeat period and a prescribed period from a period signal output means 55 which outputs the period signal of a constant interval. A period comparing means 56 executes comparison between the measuring heartbeat period and prescribed period according to the command. Next, when the prescribed period is not more than the measuring heartbeat period, a synchronizing period operating means 57 defines the prescribed period as the synchronizing period of a magnetic resonance signal. When the prescribed period is larger than the measuring heartbeat period, a value, for which a ratio between the prescribed period and measuring heartbeat period is operated and caused to be an integer number, is defined as the synchronizing period. An MR signal collecting means 58 executes the excitement of the spin and the collection of the magnetic resonance signal in each synchronizing period.

7. 发明专利

JPS6452446A EXAMINATION APPARATUS USING NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPS6452446A
公开(公告)日：1989-02-28
申请号：JP20811087
申请日：1987-08-24
申请人： HITACHI LTD
发明人： YOKOZAWA KOICHI , MIYAJIMA TAKESHI , SASABUCHI HITOSHI , ARITOMI TOSHIAKI , HIGUCHI KAZUTOSHI , ISHIZUKA TOSHIHIRO
IPC分类号： A61B10/00 , A61B5/055 , G01R33/035 , G01R33/20 , G01R33/32 , G01R33/36
摘要： PURPOSE:To simply measure various nuclides, by setting constitution providing no resonance circuit and introducing the output of a SQUID into an amplifier through a center frequency variable band-bass filter or introducing the same into a plurality of band-pass filters and the amplifier. CONSTITUTION:A signal is received by a receiving coil 1 and introduced into SQUIDs 5 by an input coil 3 through a flux transmitting circuit 2. The number of the SQUIDs are selected to (N) so that the impedance of the whole of them becomes equal to the input impedance of the filters 6 of the next stage. Therefore, a resonance circuit for impedance matching is unnecessary. The output of the whole of the SQUIDs becomes N-times in an output voltage level and sq. rt. times in S/N as compared with the case of one SQUID and the outputs of the SQUIDs are directly inputted to the filters 6. As mentioned above, since the signal thus received is inputted to each filter without passing through a circuit limiting a band at all before inputted to each filter, said signal contains the data of all nuclides.

8. 发明专利

JPS6270741A METHOD FOR DETECTING NUCLEAR MAGNETIC RESONANCE SIGNAL 失效
公开(公告)号：JPS6270741A
公开(公告)日：1987-04-01
申请号：JP21178285
申请日：1985-09-25
申请人： HITACHI LTD
发明人： TAKEDA RYUSABURO , KOIZUMI HIDEAKI , ISHIZUKA TOSHIHIRO
IPC分类号： A61B10/00 , A61B5/055 , G01R33/48 , G01R33/483 , G01R33/54
摘要： PURPOSE:To make it possible to obtain a nuclear magnetic resonance signal only from the magnetizing vector of an objective region, by saturating the magnetizing vector other than the objective region of a specimen. CONSTITUTION:When no inclined magnetic field acts on a specimen, a magnetizing vector directs to a Z-direction in all of regions as shown by a drawing A. Hereupon, a high frequency magnetic field is applied to a point A and a point B and the magnetizing vector of an objec tive region A-B is excited to be fallen to an X-Y plane as shown by a drawing B. At this time, because the phase of the magnetizing vector on the X-Y plane is disturbed, an echo is generated to align a phase. At this time, the direction of the magnetizing vectors in all regions becomes as shown by a drawing C. After that, a 90 deg.-pulse is applied to the whole of the specimen as shown by a drawing D and the magnetizing vector in the region A-B is directed to the Z-direction and the magnetizing vectors of other regions are fallen to the X-Y plane as shown by a drawing E. Next, an inclined magnetic field is applied to impart the non-uniformity of the magnetic field and the phases of the magnetic vector components on the X-Y plane are disturbed to be erased and the nuclear spins of the regions other than the region A-B are saturated. As a result, the magnetizing vector is limited only to the part of the region A-B as shown by a drawing F and a nuclear magnetic resonance signal is not generated from the regions other than the objective region.

9. 发明专利

JPH0690923A DETECTOR WITH NUCLEAR MAGNETIC RESONANCE 失效
公开(公告)号：JPH0690923A
公开(公告)日：1994-04-05
申请号：JP24759892
申请日：1992-09-17
申请人： HITACHI LTD
发明人： ISHIZUKA TOSHIHIRO
IPC分类号： A61B5/055 , G01R33/20 , G01R33/34 , G01R33/38
摘要： PURPOSE:To realize the improvement of sensitivity of the thoracic vertebrae by forming the detector used for a nuclear magnetic resonance device in a shape in which the part of the shoulder does not hit, and also, in a shape in which the face part is opened in accordance with the shape of the human body. CONSTITUTION:In the detector in the nuclear magnetic resonance device, the lower side coil 1 and the upper side coil 2 are connected electrically, and also, constituted of a structure which can be divided vertically, and also, both the coils 1, 2 are connected through a guide 6, and moreover, fixed by a stopper 7. Subsequently, in each coil 1, 2 escaping parts 3, 4 are formed so that the shoulder of an examinee does not hit, and also, in the upper side coil 2, an escaping part 5 for avoiding the face part of the examinee is formed. In such a manner, the coil can cover up to the upper side of the chest part of the examinee. According to this constitution, the improvement of sensitivity of the thoracic vertebrae side can be realized, and also, the parts of No,3-No.4 of the thoracic vertebrae can be photographed.

10. 发明专利

JPH11304783A LIQUID CHROMATOGRAPH, MASS SPECTROSCOPIC ANALYSIS APPARATUS AND LIQUID CHROMATOGRAPH MASS SPECTROSCOPIC ANALYSIS APPARATUS 失效
公开(公告)号：JPH11304783A
公开(公告)日：1999-11-05
申请号：JP10897698
申请日：1998-04-20
申请人： HITACHI LTD , HITACHI INSTRUMENTS ENG
发明人： YAMADA NORIAKI , DEGUCHI KISABURO , ISHIZUKA TOSHIHIRO , SEKI KIWAO , KACHI HIRONORI , MIURA JUNKICHI
IPC分类号： G01N27/62 , G01N30/26 , G01N30/46 , G01N30/72
摘要： PROBLEM TO BE SOLVED: To simultaneously process eluates from a plurality of columns by fewer apparatuses than the columns and obtain a low-cost highly efficient apparatus, by setting an introduction means having the plurality of columns for introducing a part or the whole of the eluates from the columns to an ionization part of fewer mass spectroscopic analysis apparatuses than the columns. SOLUTION: A control part controls the operation of a valve 8. The control part receiving a signal of a detector 6 via a signal line confirms a peak for each of a plurality of passages of a detector 7. When the peak is not confirmed, a predetermined flow passage of a six-way valve 8 is set. Only a carrier liquid 13 is supplied to an ionization part 10 at this time and a mass spectroscopic apparatus 11 does not observe a signal. When the peak of any of the flow passages of the detector 7 is observed, the control part switches the flow passage of the six-way valve 8 in the vicinity of a peak top and fills an eluate in a loop. A set time later, the six-way valve 8 is returned to the predetermined passage. The eluent filled in the loop is supplied to the ionization part 10 and molecular information on eluted components is obtained by the apparatus 11.

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