MRI Quantitative Study and Observation of the Normal Femoral Marrow / 实用放射学杂志

ABSTRACT

0.05).The values and ages were positive correlation before age 25(r=0.71～0.91,?0.05).Four main patterns of marrow distribution were identified in the proximal femur.Our data implied that there was progressive marrow fat distribution with age.The diaphyseal red marrow began to convert to yellow marrow after 5 years old and the conversion completed at age of 10.Foci of longer T 1 signals were found in the diaphysis in some of the subjects and the percentage increased with age.The femoral head and the greater trochanter showed yellow marrow signals after ossification.Conclusion Measurement of MRI signal intensity values could be used in evaluating the conversion of red to yellow marrow of the femur.Red and yellow marrow of femur may be distinguished by MRI.We should notice the different MRI feafure in different ages.