Method for obtaining T1-weighted and T2-weighted NMR images for a plurality of selected planes in the course of a single scan

摘要

A method for obtaining in the course of a single scan T1- weighted and T2-weighted NMR imaging data for a plurality of selected planes in an object using nuclear magnetic resonance techniques. The method is accomplished by positioning an object to be imaged in a static homogeneous magnetic field and then carrying out a plurality of repetitions of a repetition sequence composed of NMR excitation and magnetic field gradient pulses for a plurality of selected planes in the object. The repetition sequences for each of the selected planes include a combination of a T1-weighted pulse sequence having a TE.sub.1 and TR. sub.1 suitable for obtaining T1-weighted NMR imaging data and a T2- weighted pulse sequence having a TE.sub.2 and TR.sub.2 suitable for obtaining T2-weighted NMR imaging data. The repetition sequence for each selected plane is repeated a plurality of times and carried out in a manner so as to encode spatial information into the collection of NMR signals. Also, the T1-weighted and T2-weighted pulse sequences for each selected plane is carried out during the recovery time intervals provided in the repetition sequence for other selected planes. In this manner, T1 and T2-weighted NMR image data for a plurality of planes are obtained in a single scan in significantly reduced time.