Inclusion Criteria:

- Ability to understand and willingness to sign a witnessed, informed consent and
authorization for the release of health information.

- Patients with a diagnosis of relapsed Stage IV renal cell cancer that are medically
unresponsive to prior treatment or surgically unresectable and with metastases that
fall within the PET/CT field-of-view that can include the heart.

- Being considered for systemic therapy with Sunitinib

Exclusion Criteria:

- Women who are pregnant, breast-feeding, or of childbearing potential and not using
birth control

- Having no telephone or a reliable way in which study personal can contact them

- Subjects who are claustrophobic and cannot tolerate imaging procedures

- Subjects who weigh > 350 lb. (upper weight limit of scanner beds)