|Bone marrow edema occurs with increase in age. Generally bone marrow has three portions they are bony portion, fatty portion, blood cells production portion. In the young age all three portions are present in general ratios. As the age increases the blood cell production portion decreases and fatty portion increases these leads to bone marrow edema.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.