Fig. 2
From: Needle artifact reduction during interventional CT procedures using a silver filter
Shown are the positions in the CT image where the profiles were drawn to obtain the values of FWHM, FWTM, and the absolute error in HU used to quantify the artifacts generated from the biopsy needle. FWHM = full width half maximum, and FWTM = full width at one-tenth of maximum (FWTM). The needle was inserted from the back of the right lung until the needle tip reached the region of tissue at chest level