Work in progress: hybrid temporal-energy subtraction in digital fluoroscopy.
Initial clinical results using a digital fluoroscopic implementation of the combined time-energy ("hybrid") subtraction technique are described, with emphasis on carotid and renal imaging. Where patient motion artifacts are due to soft-tissue motion alone, hybrid subtraction can remove them. Due to the need for a finite separation time between high- and low-energy pairs, however, the present implementation of the hybrid technique is not completely immune to soft-tissue motion. The intrinsic signal-to-noise ratio of hybrid imaging is less than that of conventional temporal subtraction. However, since the low-energy temporal subtraction images are included in the hybrid data set, the diagnostic quality of the examination is not compromised.
Van Lysel, MS; Dobbins, JT; Peppler, WW; Hasegawa, BH; Lee, CS; Mistretta, CA; Zarnstorff, WC; Crummy, AB; Kubal, W; Bergsjordet, B; Strother, CM; Sackett, JF
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