Geoffrey B. Johnson, M.D., Ph.D.

The purpose of this study is to determine the sensitivity and specificity of the 15O-H2O PET myocardial perfusion imaging (MPI) study to detect coronary artery disease (CAD) using the truth-standard of invasive coronary angiogram (ICA) with fractional flow reserve (FFR) or coronary computed tomography angiogram (CCTA).

The purpose of this study is to determine the recommended phase 2 dose (RP2D), the optimal treatment regimen and to evaluate preliminary efficacy of RYZ101 alone or in combination with pembrolizumab in estrogen receptor positive (ER+), human epidermal growth factor receptor 2 (HER2)-negative, unresectable, locally advanced and unresectable or metastatic breast cancer.

The purpose of this study is to determine the recommended phase 2 dose (RP2D), the optimal treatment regimen and to evaluate preliminary efficacy of RYZ101 alone or in combination with pembrolizumab in estrogen receptor positive (ER+), human epidermal growth factor receptor 2 (HER2)-negative, unresectable, locally advanced and unresectable or metastatic breast cancer.

The purpose of this study is the diagnostic 68Ga-PSMA-11 PET/CT imaging for screening prior to consideration of 177Lu-PSMA-617 therapy.

The purpose of this study is to determine safety and measure biodistribution of  two imaging agents in patients with refractory or metastatic melanoma. This study will use [203Pb]VMT01 for Single Photon Emission Computed Tomography (SPECT) imaging and [68Ga]VMT02 for Positron Emission Tomography (PET) imaging. 

The purpose of this study is to evaluate 64Cu-SAR-bisPSMA and 67Cu-ARbisPSMA administered to participants with metastatic castrate resistant prostate cancer (mCRPC). This study is to be conducted in 3 phases: a Dosimetry Phase, a Dose Escalation Phase and a Cohort Expansion Phase.

The primary objective of this study is to provide access to [Ga-68] PSMA-11 imaging (PET/CT or PET/MR) for patients diagnosed with untreated high-risk prostate cancer or biochemically recurrent prostate cancer.