- FDA guidelines for physicians. Medical facilities are encouraged to implement these or similar procedures in order to reduce the likelihood of radiation-related complications.www.fda.gov/cdrh/xrayinj.html
- PDF format article - FDA guidelines for physicians.www.fda.gov/cdrh/sep9_94.pdf
- Article by Robert Wilson, DO, Fellow, Department of Neurology, Division of Neuro-Oncology, Children's Hospital of Philadelphia, University of Pennsylvania and Anna Janss, MD, Assistant Professor, Department of Neurology, Division of Neuro-Oncology, Children's Hospital of Philadelphia, University of Pennsylvania. Article covers workup and treatment and includes photographs and references.emedicine.com/neuro/topic330.htm