Periodic contrast-enhanced computed tomography for thermal ablation monitoring: a feasibility study.
Image-guided tumor ablation is rapidly gaining acceptance for treating many tumors. While imaging diagnosis, treatment targeting and follow-up continue to improve, little progress has been made in developing practical imaging techniques for monitoring ablation treatments. In this study we demonstrate the feasibility of using contrast-enhanced computed tomography (CECT) to monitor ablation zone growth with 2 min temporal resolution. Highly constrained back-projection (HYPR) post-processing is applied to the time-series of CECT images, improving image quality by a factor of four after acquiring ten time frames. Such improvements limit the amount of radiation and iodinated contrast material required to visualize the ablation zone, especially at early time points. Additional study of periodic CECT with HYPR processing appears warranted.
Brace
Christopher L
CL
Department of Radiology, University of Wisconsin, Madison, WI 53705, USA. clbrace@wisc.edu
Mistretta
Charles A
CA
Hinshaw
J Louis
JL
Lee
Fred T
FT
D000465:Algorithms; D000818:Animals; D017115:Catheter Ablation / Q000295:instrumentation* / Q000379:methods; D003287:Contrast Media / Q000494:pharmacology*; D005240:Feasibility Studies; D005260:Female; D006979:Hyperthermia, Induced / Q000295:instrumentation* / Q000379:methods; D007091:Image Processing, Computer-Assisted / Q000379:methods; D009369:Neoplasms / Q000473:pathology*; D011829:Radiation Dosage; D013552:Swine; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media