A method for treating a spine comprising the steps of: providing a magnetic resonance imaging (MRI) device identifying a surgical site for treatment of a spinal disorder with the MRI device, the surgical site including a portion of a spine providing a high intensity focused ultrasound (HIFU) device including a transducer for emitting ultrasound energy determining parameters of treatment for the surgical site and applying a dosage of ultrasound energy to the surgical site with the HIFU device for treating the disorder. Systems and devices are disclosed.