CT-guided biopsy (sampling)
A CT-guided biopsy is performed when, due to a diffuse lesion expansion (suspected tumor, inflammatory changes, etc.), a minimally invasive tissue sample must be obtained, which can then be examined histologically or microbiologically in order to avoid open surgery.
Depending on the location of the structure to be punctured, the patient lies either in supine, prone or lateral position on the CT table. A number of planning scans are performed based on which the access route will be determined, and to allow the physician to plan with millimeter accuracy from which point to insert the needle in order to obtain a perfect sample without injuring other structures.
Before the actual puncture, the skin is disinfected and the puncture area anesthesized so that the puncture is felt as pressure but painless. If necessary, a sedative may also be administered before the intervention.