Method of obtaining internal information of a measuring target from the out-side by the application of a nuclear magnetic resonance phenomenon

Patent 3932805 Issued on January 13, 1976. Estimated Expiration Date:

January 13, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3419793

3775671

3789832

Inventors

Assignee

Kichizo Niwa

Application

No. 05/387138 filed on 08/09/1973

US Classes:

324/309To obtain localized resonance within a sample

Examiners

Primary: Smith, Alfred E.
Assistant: Tokar, Michael

Attorney, Agent or Firm

Staas & Halsey

International Classes

G01F 1/704 (20060101)
G01F 1/716 (20060101)
G01R 33/48 (20060101)

Foreign Application Priority Data

1973-02-02 JA

Abstract

This invention relates to a method of obtaining internal information of the body to be investigated (target) by the application to the target of a nuclear magnetic resonance phenomenon, in which the measuring target is placed in a homogeneous magnetic field Ho and a static or scanning magnetic field Hs is superimposed on the homogenous magnetic field Ho within a specified area of the target; from the inside or outside thereof. A high frequency field H1 of a frequency determined by the static field Ho +ƊHs in the measuring target area (MT) is applied uniformly to the body thereby obtaining information of a nuclear magnetic substance disposed within the specified area of the body, i.e., the measuring target in accordance with detection of a resonance frequency defined by Ho +ƊHs. Alternatively, the scanning field ƊHs may be applied to the body only outside of the target region and a resonance frequency defined by Ho only then is detected as to the target MT. The high frequency field may be constant or pulsed.