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NMR imaging of the brain using spin-echo sequences

D R Bailes, I R Young, D J Thomas

    Clinical Radiology
    |July 1, 1982
    PubMed
    Summary

    Nuclear Magnetic Resonance (NMR) spin-echo sequences are highly sensitive for detecting neurological diseases. This advanced imaging technique revealed abnormalities in various conditions, often surpassing X-ray computed tomography (CT) in diagnostic capability.

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    Area of Science:

    • Neurology
    • Radiology
    • Medical Imaging

    Background:

    • Conventional imaging techniques like X-ray computed tomography (CT) have limitations in detecting subtle neurological abnormalities.
    • Nuclear Magnetic Resonance (NMR) imaging offers potential for improved visualization of brain tissue and pathology.

    Purpose of the Study:

    • To evaluate the diagnostic efficacy of different Nuclear Magnetic Resonance (NMR) imaging sequences in patients with neurological diseases.
    • To compare the sensitivity of NMR techniques against X-ray computed tomography (CT) for detecting brain abnormalities.

    Main Methods:

    • Studied 8 normal volunteers and 32 patients with neurological diseases using NMR scanner.
    • Employed repeated free induction decay (RFID), inversion-recovery (IR), and spin-echo (SE) NMR sequences.

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  • Compared NMR findings with results from X-ray computed tomography (CT).

    • Main Results:

    • IR sequences (T1-dependent) showed high grey-white matter contrast and detected various pathological changes.
    • SE sequences (T2-dependent) with longer tau values identified abnormalities in cerebral infarction, hemorrhage, encephalitis, multiple sclerosis, edema, hydrocephalus, tumors, and Wilson's disease, often showing increased T2 values.
    • NMR detected abnormalities missed by CT in multiple sclerosis and brainstem infarction, and showed more extensive changes in other conditions.

    Conclusions:

    • NMR spin-echo sequences are a sensitive method for detecting a wide range of neurological diseases.
    • NMR imaging, particularly T2-weighted spin-echo sequences, offers superior sensitivity compared to CT in specific neurological conditions.
    • The study highlights the diagnostic value of NMR in identifying and characterizing various brain pathologies.