The division of T1-weighted image by T2-weighted image (T1w/T2w) has recently been introduced as a myelin quantifier, which gained attention due to the ease of obtaining images. However, controversy exists about its performance. The aim of this study was to test the correlation of T1w/T2w with other MRI quantifiers of myelin, so as to determine its performance. Moderate to strong correlation of T1w/T2w with the other quantifiers was observed. T1w/T2w appears to be sensitive to detect an abnormality, but is not specific for myelin.