Your doctor will ask if there is a family history of arthritis. MRI scans, ultrasound scans and X-rays can be used to help confirm diagnosis. Bloodtests may be used to exclude other conditions. For example a test for rheumatoid factor will help rule out rheumatoid arthritis. Imaging Tests. Depending on the findings so far, your doctor may order lab and/or imaging tests. Lab Tests. Blood may be drawn to checkfor levels of inflammation, presence of antibodies, and status of general systems (complete blood count, liver and kidney function, etc.)........