Fine needle aspiration is a type of biopsy procedure. In fine needle aspiration, a thin needle is inserted into an area of abnormal-appearing tissue or body fluid. As with other types of biopsies, the ...

To understand what’s going on with a patient, doctors may take a biopsy—a sample of tissue extracted from a suspicious lump, for example. Fine needles are typically used for this purpose, in a ...

Photoacoustic imaging is an imaging modality related to ultrasound imaging. A light source is inserted into a hollow-core needle and used to illuminate the patient's tissues. The tissue expands, ...