A 67-year-old woman presents with complaints of a tender, progressively flattening arch on the left foot. She has no pain in the right foot, and modifying her shoe gear to softer, more "comfortable" styles has not helped alleviate her symptoms. Her symptoms began approximately 6 weeks ago when she heard a popping sound in her foot. Which of the following diagnostic modalities would be best for confirming the diagnosis?
1) An MRI scan of both feet
2) A CT scan of both feet
3) Multiple x-ray views
4) An arthritis panel to include SMAC-12, ANA, ESR, C-reactive protein, RA, and LE prep
