report is elaborate and you need to understand that .
1. that you have post operative change(probably you underwent surgery recently) if that is so the same will subside as time passes and no need to worry for the same.
2.As you underwent surgery previously the same might cause some joint effusion
as part of healing(that is fluid in joint cavity) as there is minimal fluid accumulation mentioned in MR report.Besides the healing process that is natural you also should consult physiotherapist and practice the physiotherapy
prescribed by physiotherapist in a diligent manner and regularly.
3.There is increased signal involving supraspinatous tendon that is interpreted as tendenopathy and may restrict movement of shoulder joint also.
Besides you must also consult your orthopedic surgeon who conducted the surgery if the symptoms are not relieved despite your physiotherapy and other medication that you might be taking.