Cervical and cranial computed tomographic angiography with automated bone removal: dual energy computed tomography versus standard computed tomography.

摘要: OBJECTIVE In supraaortic vessels, bone subtracted maximum intensity projections make the evaluation of computed tomographic angiography (CTA) datasets easier and faster. Dual energy CT can be used for removal without user interaction. The purpose this study was to compare results conventional dual energy-based removal. MATERIALS AND METHODS vessels acquired in 30 patients at 140 80 kVp tube potential simultaneously. Thick images 0.75 mm were reconstructed from both datasets, an additional weighted average dataset using information tubes calculated. Two readers independently assessed vessel delineation, completeness removal, preservation, as well adequacy diagnostic after (DEBR) (CoBR). Student t test Wilcoxon rank sum applied differences between data significance. Cohen's kappa-test calculate interobserver agreement. RESULTS Of DEBR 88.3% rated adequate compared with only 6.7% CoBR, P < 0.001. (35%) contained all no bony structures, whereas CoBR still residual showed partial truncations. Vessel delineation significantly better DEBR. profited stronger vascular enhancement, it had significant influence on CoBR. Reading times 173 +/- 55 seconds 253 12 0.001, which corresponds a reduction 32%. Comparison CTA versus single dose 29.0% 43.7%. CONCLUSIONS Energy-based remove structures time-consuming This leads reading time, radiation improved delineation.