in this context typically refers to:

Kerley B lines are an essential radiological finding that can aid in the diagnosis and management of conditions associated with interstitial edema. Early recognition of Kerley B lines can facilitate prompt intervention and improve patient outcomes. Clinicians should be aware of the clinical significance of Kerley B lines and incorporate them into their diagnostic and treatment strategies.

They are typically found at the lung bases, particularly at the costophrenic angles .