JPH0222708Y2 - - Google Patents
Info
- Publication number
- JPH0222708Y2 JPH0222708Y2 JP1983135569U JP13556983U JPH0222708Y2 JP H0222708 Y2 JPH0222708 Y2 JP H0222708Y2 JP 1983135569 U JP1983135569 U JP 1983135569U JP 13556983 U JP13556983 U JP 13556983U JP H0222708 Y2 JPH0222708 Y2 JP H0222708Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- fid signal
- audible
- fid
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005481 NMR spectroscopy Methods 0.000 claims description 9
- 230000005236 sound signal Effects 0.000 claims description 4
- 230000003094 perturbing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Magnetic Resonance Imaging Apparatus (AREA)
Description
【考案の詳細な説明】
本考案は、核磁気共鳴（以下NMRと略す）現
象を用いて特定原子核の存在を検出するNMR分
析器に関する。[Detailed Description of the Invention] The present invention relates to an NMR analyzer that detects the presence of specific atomic nuclei using the phenomenon of nuclear magnetic resonance (hereinafter abbreviated as NMR).
この種のNMR分析器は従来からよく知られて
いる。この従来の分析器では、特定原子核の共鳴
信号所謂FID（free induction decay）信号は、
オシロスコープで観測されたりスペクトルアナラ
イザにかけて分析されたりする。精密な測定には
このような観測や分析は不可欠であろうが、もつ
とおおざつばにこれを把握したいという場合には
多少不向きである。この場合、FID信号を音声信
号に変換しこれを聴覚によつて観測できるように
しておけばその目的は達せられ、極めて便利なも
のとなる。即ち、次にようなメリツトが期待でき
る。 NMR analyzers of this type are well known in the art. In this conventional analyzer, the resonance signal of a specific atomic nucleus, the so-called FID (free induction decay) signal, is
It is observed with an oscilloscope or analyzed with a spectrum analyzer. Although this kind of observation and analysis is essential for precise measurements, it is somewhat unsuitable when you want to get a rough idea of what it is. In this case, if the FID signal is converted into an audio signal and this can be observed by hearing, the purpose can be achieved and it will be extremely convenient. That is, the following benefits can be expected.
(1) イメージング空間内に例えば水を含む物体が
存在するか否か、及びどのような現象が起つて
いるかが直感的に把握できる。(1) It is possible to intuitively understand whether an object containing water exists in the imaging space, and what kind of phenomenon is occurring.
(2) 周波数の分布から位置と水の量が直感でき被
検物体の大体の様子を知ることができる。(2) The position and amount of water can be intuitively determined from the frequency distribution, and the general condition of the object to be examined can be known.
(3) 緩和時間T1の長さも直感で知ることができ
る。(3) The length of relaxation time T 1 can also be known intuitively.
(4) 変調摂動磁界により得られたFID信号を復調
し、そのUSBとLSBを左右の耳に振り分けて
利くことにより上記(2)のメリツトを更に強力化
することができる。(4) The above merit (2) can be further enhanced by demodulating the FID signal obtained by the modulated perturbation magnetic field and distributing the USB and LSB to the left and right ears.
本考案は、以上のような点に鑑みてなされたも
ので、その目的は、FID信号を可聴音に変換して
確認することのできるようにしたFID信号の可聴
モニタを有するNMR分析器を実現することにあ
る。 The present invention was developed in view of the above points, and its purpose is to realize an NMR analyzer that has an audible monitor of the FID signal that can be confirmed by converting the FID signal into an audible sound. It's about doing.
この目的を達成する本考案は、摂動磁界に変調
をかけ、得られるFID信号を復調し、得られた復
調信号を可聴域のバンドパスフイルタを通すこと
によりFID信号を音声信号として取り出しこれを
可聴モニタ手段にて検出するようにしたことを特
徴とするものである。 The present invention that achieves this objective modulates the perturbed magnetic field, demodulates the obtained FID signal, and passes the obtained demodulated signal through an audible bandpass filter to extract the FID signal as an audio signal and convert it into an audible signal. This is characterized in that the detection is performed by a monitor means.
以下、図面を用いて本考案を詳細に説明する。 Hereinafter, the present invention will be explained in detail using the drawings.
第１図は本考案の一実施例の概略を示す要部構
成図である。図において、１は被検物体２を取り
囲ように巻回された励磁兼検出コイルである。主
磁界H0はこのコイル１の中心軸（Ｘ軸）とは直
角な方向（Ｚ軸方向）に印加されており、観測中
には、被検物体２がＸ軸を中心軸として回転する
か、又は磁場システムの方がＸ軸を中心軸として
回転するようになつている。３は周波数f0＝γH0
（γ：磁気回転比）の局部発振器、４は変調信号
を送出する駆動パルス発生器である。５は平衡変
調器で、局部発振器３の出力を駆動パルス発生器
４の出力により変調し、パワーアンプ６を介して
コイル１を駆動する。これにより被検物体２には
摂動磁界が印加されることになる。 FIG. 1 is a diagram showing the outline of an embodiment of the present invention. In the figure, reference numeral 1 denotes an excitation/detection coil wound around an object 2 to be tested. The main magnetic field H 0 is applied in a direction (Z-axis direction) perpendicular to the central axis (X-axis) of this coil 1, and during observation, the test object 2 rotates around the X-axis. , or the magnetic field system is adapted to rotate about the X-axis. 3 is frequency f 0 = γH 0
(γ: gyromagnetic ratio) local oscillator, 4 is a drive pulse generator that sends out a modulation signal. A balanced modulator 5 modulates the output of the local oscillator 3 with the output of the drive pulse generator 4, and drives the coil 1 via the power amplifier 6. As a result, a perturbing magnetic field is applied to the object 2 to be tested.
一方、FID信号はコイル１で検出され受信用
RFアンプ７を通して適宜に増幅された後、平衡
変調器８において局部発振器３の出力信号により
復調され、FID信号のエンベロープを示す信号と
なつて出力される。この信号は、一方では、ベー
スバンドアンプ９を通して画像再構成用のフーリ
エ変換プロセツサ又はデータレコーダ等へ送ら
れ、他方では本願の特徴とする可聴音モニタシス
テムに送られる。この可聴音モニタシステムは、
バンドパスフイルタ１０、アツテネータ１１、オ
ーデイオアンプ１２、スピーカ１３、ヘツドホン
１４より構成され、平衡変調器８より出力される
FID信号を、バンドパスフイルタ１０を介して可
聴域のみピツクアツプし適宜に減衰、増幅して音
声信号として検出する。尚、出力手段はスピーカ
１３又はヘツドホン１４の何れか一つでもよい。
このような構成により、FID信号信号を音に変換
して出力することができ、前記(1)〜(3)にような効
果が得られる。 On the other hand, the FID signal is detected by coil 1 and used for reception.
After being appropriately amplified through the RF amplifier 7, it is demodulated by the output signal of the local oscillator 3 in the balanced modulator 8, and is output as a signal indicating the envelope of the FID signal. This signal is sent on the one hand to a Fourier transform processor or data recorder for image reconstruction through the baseband amplifier 9, and on the other hand to the audible sound monitoring system featured in the present application. This audible sound monitoring system
It is composed of a bandpass filter 10, an attenuator 11, an audio amplifier 12, a speaker 13, and a headphone 14, and is output from a balanced modulator 8.
The FID signal is picked up only in the audible range through a bandpass filter 10, and is appropriately attenuated and amplified to be detected as an audio signal. Note that the output means may be either the speaker 13 or the headphone 14.
With such a configuration, the FID signal signal can be converted into sound and output, and the effects as described in (1) to (3) above can be obtained.
第２図は本考案の他の実施例を示す説明図で、
特に受信部の詳細を示す図である。即ち、受信用
RFアンプ７の出力は２つの平衡変調器８ａ，８
ｂに共通に導かれる。ここで、一方の変調器８ａ
には第１図と同様に局部発振器３の出力がそのま
ま与えられるが、他方の変調器８ｂには90゜移相
器２１を介して周波数f0の信号が与えられる。変
調器８ａ，８ｂの出力はヒルベルト変換器HT
（Ａ）、HT（Ｂ）にそれぞれ入力される。ヒルベ
ルト変換器の各出力は加算器２３ａ，２３ｂでそ
れぞれ加算及び減算され、USB（upper side
band）及びLSB（lower side band）に分離され
た信号が得られる。USB、LSB信号はバンドパ
スフイルタ２４ａ，２４ｂを介して可聴域が取り
出され、オーデイオアンプ２５ａ，２５ｂを介し
てステレオヘツドホン２６にそれぞれ導かれる。 FIG. 2 is an explanatory diagram showing another embodiment of the present invention,
In particular, it is a diagram showing details of the receiving section. That is, for receiving
The output of the RF amplifier 7 is connected to two balanced modulators 8a, 8.
Commonly guided by b. Here, one modulator 8a
As in FIG. 1, the output of the local oscillator 3 is applied as is to the modulator 8b, but a signal of frequency f 0 is applied to the other modulator 8b via a 90° phase shifter 21. The outputs of modulators 8a and 8b are Hilbert transformers HT
(A) and HT (B), respectively. Each output of the Hilbert converter is added and subtracted by adders 23a and 23b, respectively, and the USB (upper side
A signal separated into LSB (lower side band) and LSB (lower side band) is obtained. The audible range of the USB and LSB signals is extracted through bandpass filters 24a and 24b, and guided to stereo headphones 26 through audio amplifiers 25a and 25b, respectively.
これにより、前述の(4)のような効果が得られ
る。 As a result, the effect described in (4) above can be obtained.
以上説明したように、本考案によれば、FID信
号を可聴音に変換して検出することができ、被検
物体内での注目する特定原子核の存在や現象を大
ざつばではあるが直感的に把握することができ、
極めて便利なNMR分析器を実現することができ
る。 As explained above, according to the present invention, the FID signal can be converted into an audible sound and detected, and the presence or phenomenon of a specific atomic nucleus of interest within the test object can be detected intuitively, albeit roughly. can be grasped,
An extremely convenient NMR analyzer can be realized.
第１図は本考案に係るFID信号の可聴モニタを
有するNMR分析器の一実施例を示す要部構成
図、第２図は本考案の他の実施例を示す説明図で
ある。
１……励磁兼検出コイル、３……局部発振器、
４……駆動パルス発生器、６，８，８ａ，８ｂ…
…平衡変調器、７……受信用RFアンプ、１０，
２４ａ，２４ｂ……バンドパスフイルタ、１３…
…スピーカ、１４……ヘツドホン、２６……ステ
レオヘツドホン。
FIG. 1 is a block diagram showing the main parts of an embodiment of an NMR analyzer having an audible monitor for FID signals according to the present invention, and FIG. 2 is an explanatory diagram showing another embodiment of the present invention. 1... Excitation and detection coil, 3... Local oscillator,
4... Drive pulse generator, 6, 8, 8a, 8b...
... Balanced modulator, 7 ... RF amplifier for reception, 10,
24a, 24b...Band pass filter, 13...
...Speaker, 14...Headphone, 26...Stereo headphone.
Claims (1)
復調し、得られた復調信号を可聴域のバンドパ
スフイルタを通すことによりFID信号を音声信
号として取り出しこれを可聴モニタ手段にて検
出するようにしたことを特徴とするFID信号の
可聴モニタを有する核磁気共鳴分析器。 (2) 前記FID信号の復調はUSBとLSBに分離し
て取り出すようにしたことを特徴とする実用新
案登録請求の範囲第１項記載のFID信号の可聴
モニタを有する核磁気共鳴分析器。[Claims for Utility Model Registration] (1) Modulating the perturbing magnetic field, demodulating the obtained FID signal, and extracting the FID signal as an audio signal by passing the obtained demodulated signal through an audible bandpass filter. A nuclear magnetic resonance analyzer having an audible monitor for an FID signal, characterized in that the FID signal is detected by an audible monitor means. (2) A nuclear magnetic resonance analyzer having an audible monitor for an FID signal according to claim 1, wherein the FID signal is demodulated and extracted separately into USB and LSB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13556983U JPS6042976U (en) | 1983-09-01 | 1983-09-01 | Nuclear magnetic resonance analyzer with audible monitor of FID signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13556983U JPS6042976U (en) | 1983-09-01 | 1983-09-01 | Nuclear magnetic resonance analyzer with audible monitor of FID signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6042976U JPS6042976U (en) | 1985-03-26 |
| JPH0222708Y2 true JPH0222708Y2 (en) | 1990-06-19 |
Family
ID=30305101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13556983U Granted JPS6042976U (en) | 1983-09-01 | 1983-09-01 | Nuclear magnetic resonance analyzer with audible monitor of FID signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6042976U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5298575A (en) * | 1976-02-14 | 1977-08-18 | Nippon Steel Corp | Machine checker using ultrasonic detection |
| JPS52123679A (en) * | 1976-04-09 | 1977-10-18 | Koyo Seiko Co | Apparatus for checking for defectiveness of bearing |
| JPS5582953A (en) * | 1978-12-19 | 1980-06-23 | Jeol Ltd | Fourier transformation nuclear magnetism resonance device |
-
1983
- 1983-09-01 JP JP13556983U patent/JPS6042976U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5298575A (en) * | 1976-02-14 | 1977-08-18 | Nippon Steel Corp | Machine checker using ultrasonic detection |
| JPS52123679A (en) * | 1976-04-09 | 1977-10-18 | Koyo Seiko Co | Apparatus for checking for defectiveness of bearing |
| JPS5582953A (en) * | 1978-12-19 | 1980-06-23 | Jeol Ltd | Fourier transformation nuclear magnetism resonance device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6042976U (en) | 1985-03-26 |
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