Subjects that provide Informed Consent and satisfy the Eligibility Criteria will undergo CT or Ultrasound guided percutaneous placement of a single, two, three, or four Light Sources depending on their tumor characteristics. No more than four Light Sources will be used at a single treatment session. The Light Sources may be used in a single lesion or in multiple lesions. Depending on lesion size, one or more Light Sources may be used to treat a single lesion.