These are procedures ordered for diagnostic purposes. Using CT for image guidance, biopsy and/or aspiration needles are directed towards a lesion and a tissue sample obtained for pathologic evaluation.
These procedures are indicated when the etiology, or cause, of a lesion is unknown and needs to be established to guide treatment. Examples include:
- Bone lesions such as infection or tumor in the sacrum or iliac bone (pelvis)
- Tumors or infection in the vertebral bones
- Disc infection, in order to guide antibiotic or antifungal therapy
- Generally not required, but may be indicated.
- No preparation is required.
- Only one CT contrast study should be scheduled within a 48 hour period.
- BUN and creatinine must be done within 72 hours of the scan.
- Nothing but clear liquid after midnight before the scan.
- NPO four hours prior to exam (no food or drink).
- Generally not required, but may be indicated depending on the patient.
- Anesthesia on these studies always needs to be authorized by a radiologist.