Method for the operation of a nuclear magnetic resonance apparatus for the fast identification of the longitudinal relaxation time T.sub.1

US4733186A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Arnulf Oppelt · Spardorf, DE
• Rainer Graumann · Annaberg-Buchholz, DE

Key dates

• Filing date: Oct 10, 1986
• Grant date: Mar 22, 1988
• Expiry date: Oct 10, 2006

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/50
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for the operation of a nuclear magnetic resonance apparatus excites the spin system of an examination subject by applying a fundamental magnetic field as well as by irradiation with a sequence of radio-frequency pulses and the nuclear magnetic resonance signals emitted by the spin system are measured. The chronological development of the longitudinal magnetization of the spin system can be tracked by a sequence of partial read pulses each having a flip angle of less than 90.degree. and thus a fast identification of the longitudinal relaxation time T.sub.1 can be achieved. In combination with applied gradient fields, the method can be applied in imaging nuclear magnetic resonance tomography.