1.	Positron Emission Tomography/Computerized Tomography (PET/CT) Guided Fulvestrant Therapy for Patients With Recurrent or Metastatic Breast Cancer Phase: Phase II Type: Diagnostic, Treatment Status: Approved-not yet active Age: 45 and over Sponsor: Other Protocol IDs: PET/CT Breast, PET/CT, Recurrent or metastatic, Breast Cancer, NCT00816582
2.	Molecular Imaging of Fulvestrant Effects on Availability of ER Binding Sites Phase: Phase II Type: Biomarker/Laboratory analysis, Diagnostic, Treatment Status: Active Age: 18 and over Sponsor: Other Protocol IDs: RUG2010-2611, NCT01377324
3.	FES-PET to Determine ER-expression in Epithelial Ovarian Cancer Phase: Phase II Type: Diagnostic Status: Active Age: 18 and over Sponsor: Other Protocol IDs: RUG2011-0704, NCT01439490
4.	Imaging of ER Density to Guide and Improve Tailored Therapy for Acquired Anti-hormonal Resistant Breast Cancer Phase: No phase specified Type: Diagnostic Status: Active Age: 18 and over Sponsor: Other Protocol IDs: RUG 2009-4529, NCT01088477
5.	Vorinostat in Treating Patients With Stage IV Breast Cancer Receiving Aromatase Inhibitor Therapy Phase: No phase specified Type: Biomarker/Laboratory analysis, Diagnostic, Treatment Status: Active Age: 18 and over Sponsor: NCI, Other Protocol IDs: 6856, NCI-2010-01289, NCT01153672
6.	Fluoroestradiol PET Imaging in Predicting Response to Hormone Therapy of Breast Cancer Phase: No phase specified Type: Diagnostic Status: Active Age: 18 and over Sponsor: Other Protocol IDs: P110113, IDRCB, NCT01627704