Bone Marrow Imaging
نویسنده
چکیده
(1) Background Bone marrow is the body’s 4 largest organ constituting 5% of its body weight. It consists of trabecular bone and a variety of cells including hematopoetic, fat, stroma and RES cells as well as sinsusoids. Bone marrow composition changes with age, which is reflected in a change in signal characteristics in MR images. Red marrow, which is found in younger individuals is composed of 40% fat and 40% water while yellow bone marrow contains approximately 80% fat and 15% water. MRI is an extremely sensitive technique to detect bone marrow pathology. However, in order to correctly assess its pathology we should be aware of its normal age-related morphology as well as reactive physiological changes. It should also be considered that problems may occur if bone marrow infiltration is diffuse and differentiation of hematopoietic bone marrow and neoplastic infiltration may sometimes be difficult.
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