Methods for using mri-compatible patches

A method for identifying a physical location on a body surface of a patient, the method comprising:

• providing a patch including:
• a flexible base layer that is mountable on and substantially conformable to a patient's body surface, the base layer having opposed upper and lower primary surfaces;
• a flexible substrate that is releasably attached to the upper primary surface of the base layer and substantially conformable to the patient's body surface;
• and
• at least one MRI-visible fiducial element defined by or secured to the flexible substrate;
• securing the base layer to the body surface to mount the patch on the body surface such that the flexible substrate conforms to the body surface;
• thereafter
• MRI scanning the patient with the patch on the body surface to generate corresponding image data;
• thereafter
• identifying a physical location on the body surface using the image data;
• and
• removing at least a portion of the flexible substrate from the base layer.