X-Ray Psoralen Activated Cancer Therapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** A variation on UV phototherapy where psoralen is co-administered with a novel non-tethered phosphors that absorb x-rays and re-radiate at UV wavelengths. This methodology extends the usefulness of UV phototherapy beyond what is typically possible with the limited penetration of UVA in tissue.

**Synonyms:** - X-PACT