Dual-Energy Computed Tomography Angiography of the Head and Neck With Single-Source Computed Tomography: A New Technical (Split Filter) Approach for Bone Removal

Journal article


Publication Details

Author(s): Kämmerer N, Brand M, Hammon M, May M, Wuest W, Krauss B, Uder M, Lell M
Journal: Investigative Radiology
Publication year: 2016
Volume: 51
Journal issue: 10
Pages range: 618-23
ISSN: 0020-9996


Abstract


Dual-energy computed tomographic angiography (DE-CTA) has been demonstrated to improve the visualization of the head and neck vessels. The aim of this study was to test the potential of split-filter single-source dual-energy CT to automatically remove bone from the final CTA data set.Dual-energy CTA was performed in 50 consecutive patients to evaluate the supra-aortic arteries, either to grade carotid artery stenosis or to rule out traumatic dissections. Dual-energy CTA was performed on a 128-slice single-source CT system equipped with a special filter array to separate the 120-kV spectrum into a high- and a low-energy spectrum for DE-based automated bone removal. Image quality of fully automated bone suppression and subsequent manual optimization was evaluated by 2 radiologists on maximum intensity projections using a 4-grade scoring system. The effect of image reconstruction with an iterative metal artifact reduction algorithm on DE postprocessing was tested using a 3-grade scoring system, and the time demand for each postprocessing step was measured.Two patients were excluded due to insufficient arterial contrast enhancement; in the remaining 48 patients, automated bone removal could be performed successfully. The addition of iterative metal artifact reduction algorithm improved image quality in 58.3% of the cases. After manual optimization, DE-CTA image quality was rated excellent in 7, good in 29, and moderate in 10 patients. Interobserver agreement was high (? = 0.85). Stenosis grading was not influenced using DE-CTA with bone removal as compared with the original CTA. The time demand for DE image reconstruction was significantly higher than for single-energy reconstruction (42.1 vs 20.9 seconds).Our results suggest that bone removal in DE-CTA of the head and neck vessels with a single-source CT is feasible and can be performed within acceptable time and moderate user interaction.



FAU Authors / FAU Editors

Hammon, Matthias PD Dr.
Radiologisches Institut
Kämmerer, Nadine
Lehrstuhl für Diagnostische Radiologie
Lell, Michael Prof. Dr.
Medizinische Fakultät
May, Matthias PD Dr.
Radiologisches Institut
Uder, Michael Prof. Dr.
Lehrstuhl für Diagnostische Radiologie


How to cite

APA:
Kämmerer, N., Brand, M., Hammon, M., May, M., Wuest, W., Krauss, B.,... Lell, M. (2016). Dual-Energy Computed Tomography Angiography of the Head and Neck With Single-Source Computed Tomography: A New Technical (Split Filter) Approach for Bone Removal. Investigative Radiology, 51(10), 618-23. https://dx.doi.org/10.1097/RLI.0000000000000290

MLA:
Kämmerer, Nadine, et al. "Dual-Energy Computed Tomography Angiography of the Head and Neck With Single-Source Computed Tomography: A New Technical (Split Filter) Approach for Bone Removal." Investigative Radiology 51.10 (2016): 618-23.

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Last updated on 2019-20-07 at 07:20