Hunter's angle

Hunter’s angle. 
( A) spectra obtained from healthy control in comparison to 
( B) brain tumor --> REVERSAL OF HUNTER'S ANGLE
( C) the posterior gray matter of a patient with Alzheimer’s disease.

Hunter's angle (HA) is a term coined from a neurosurgeon, C Hunter Shelden, at Huntington Medical Research Institutes. 

He placed his comb on the spectrum at approximately a 45° angle and connected several of the peaks.

Hunter's angle is the line formed by the metabolites in MR spectroscopy.

Metabolites myo-inositol, choline, creatine, and N-acetyl aspartate (NAA) peaks are ascending in a normal spectrum, any alteration in the ascending nature of the peaks means the spectrum is abnormal.


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