Multispectral Optoacustic Imaging in Patients With Myositis

All measurements using multispectral optoacustic tomography (MSOT) are performed on the paraspinal muscles as well as the trapezius, rectus abdominus and the proximal and distal limb muscles in a right vs. left comparison (leg proximal: quadriceps and ischiocrural muscle, leg distal triceps surae muscle, tibialis anterior muscle; arm proximal: M. biceps, distal: forearm flexors).