The purpose of this study is to determine whether 18F-Al labeled RGD is safety and effective for cancer diagnosis and therapy response.

Observe radiation dose to healthy volunteers and patients; the correlation between integrin level and tumor/metastases uptake.

Inclusion Criteria:

1. Volunteers or patients with age more than 18 yeas;
2. The patients have been diagnosed with cancer or suspected with cancer;
3. It must fulfill the ethical requirements and subjects have signed an informed consent.

Exclusion Criteria:

1. Pregnancy or nursing mothers;
2. Having drugs or alcohol dependence;
3. Hypersensitive to the active or inactive ingredients of the study drug;
4. Having attended other drug clinical trials within three months;
5. Cardiac functional insufficiency;
6. Hepatic and renal function insufficiency;
7. Hypertensive patients with serious complications;
8. Endangering the safety of life.