Screening for prostate cancer typically involves a blood test called the prostate-specific antigen, or PSA, test. PSA is a protein made by cells in the prostate gland. While PSA is mostly found in semen, a small amount circulates in the blood. This test is one of the most common methods used to screen for prostate cancer.
The test measures the amount of PSA in the blood. Normal PSA levels vary based on age, prostate size and other factors. If PSA levels are high—typically over 4 ng/mL—or a rapid rise in levels are noted, then additional blood tests or non-invasive imaging may be needed to guide decisions about whether a biopsy of the prostate is advisable.
“Although the blood test does not determine by itself, whether or not someone has prostate cancer,” says Dr. Sanda. “It can identify men at risk for prostate cancer, or men whose chances of having prostate cancer are high enough to suggest that additional testing would be advisable.”
Further testing, such as a prostate health index blood test (which measures different types of PSA protein) or prostate magnetic resonance imaging (MRI) may be needed to determine whether the chance of prostate cancer is high enough to justify considering a biopsy that would determine if a cancer were present.
At Winship, our experienced radiologists offer advanced imaging for all phases of prostate cancer, including multiparametric (3D) prostate MRI to guide biopsies with greater precision. Our radiology team is home to the only PET-MRI in Georgia, which combines the power of MRI and PET in one machine.