Reduction of dark-band-like metal artifacts caused by dental implant bodies using hypothetical monoenergetic imaging after dual-energy computed tomography

Tanaka, Ray; Hayashi, Takafumi; Ike, Makiko; Noto, Yoshiyuki; Goto, Tazuko K.

doi:10.1016/j.oooo.2013.03.014

Cited by 46 publications

(23 citation statements)

References 10 publications

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“…[2][3][4][5][6][7][8] Studies have increasingly been demonstrating potential advantages of DECT for the evaluation of head and neck pathologies. [8][9][10][11][12][13][14][15][16][17][18] Extrapolating from abdominal imaging, 70-keV virtual monochromatic image (VMI) reconstructions are believed to be those that most closely resemble a standard single-energy CT acquisition 19 and are usually the default setting for CT of the neck. On the other hand, enhancing tumors have increased attenuation on lower-kiloelectron volt (keV) VMIs, closer to the k edge of iodine, 20 albeit at the expense of other factors such as increased image noise.…”

mentioning

confidence: 99%

Optimal Virtual Monochromatic Images for Evaluation of Normal Tissues and Head and Neck Cancer Using Dual-Energy CT

Lam

Gupta

Levental

et al. 2015

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE: Dual-energy CT is not used routinely for evaluation of the head and neck, and there is no consensus on the optimal virtual monochromatic image energies for evaluating normal tissues or head and neck cancer. We performed a quantitative evaluation to determine the optimal virtual monochromatic images for visualization of normal tissues, head and neck squamous cell carcinoma, and lymphadenopathy.

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confidence: 99%

Optimal Virtual Monochromatic Images for Evaluation of Normal Tissues and Head and Neck Cancer Using Dual-Energy CT

Lam

Gupta

Levental

et al. 2015

AJNR Am J Neuroradiol

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“…A previous study demonstrated that MEIs at 70 keV provided subjectively improved image qualities compared with PEIs in the evaluation of hepatic metastases [23], and that MEIs at 100 keV could significantly reduce dark-band-like artefacts, making it possible to evaluate the condition of bone-encircling dental implant bodies [24]. Nevertheless, few studies to date have investigated the application of MEIs or AMEIs to the stomach.…”

Section: Discussionmentioning

confidence: 99%

Decreased stage migration rate of early gastric cancer with a new reconstruction algorithm using dual-energy CT images: a preliminary study

et al. 2016

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ObjectivesTo evaluate the potential value of advanced monoenergetic images (AMEIs) on early gastric cancer (EGC) using dual-energy CT (DECT).Methods31 EGC patients (19 men, 12 women; age range, 38–81 years; mean age, 57.19 years) were retrospectively enrolled in this study. Conventionally reconstructed polyenergetic images (PEIs) at 120 kV and virtual monoenergetic images (MEIs) and AMEIs at six different kiloelectron volt (keV) levels (from 40 to 90 keV) were evaluated from the 100 and Sn 140 kV dual energy image data, respectively. The visibility and stage migration of EGC for all three image data sets were evaluated and statistically analyzed. The objective and subjective image qualities were also evaluated.ResultsAMEIs at 40 keV showed the best visibility (80.7 %) and the lowest stage migration (35.5 %) for EGC. The stage migration for AMEIs at 40 keV was significantly lower than that for PEIs (p = 0.026). AMEIs at 40 keV had statistically higher CNR in the arterial and portal phases, gastric-specific diagnostic performance and visual sharpness compared with other AMEIs, MEIs and PEIs (all p < 0.05).ConclusionsAMEIs at 40 keV with MPR increase the CNR of EGC and thus potentially lower the stage migration of EGC.Key Points• AMEIs benefits from the recombination of low-keV images and medium energies. • AMEIs could receive better CNR results than MEIs. • AMEIs at 40 keV potentially lower the stage migration of EGC. Electronic supplementary materialThe online version of this article (doi:10.1007/s00330-016-4442-z) contains supplementary material, which is available to authorized users.

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“…25,26 Lell et al 27 presented a different technique for metal artifact reduction in head and neck imaging based on postprocessing of DSCT data but did not specifically investigate image quality of head and neck tumors. In our study, we focused on the evaluation of objective and subjective image quality for imaging of head and neck SCC, which was superior using the 60 keV reconstructions.…”

Section: Discussionmentioning

confidence: 99%

Virtual Monoenergetic Dual-Energy Computed Tomography

Wichmann¹,

Nöske²,

Kraft³

et al. 2014

Investigative Radiology

110

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Reduction of dark-band-like metal artifacts caused by dental implant bodies using hypothetical monoenergetic imaging after dual-energy computed tomography

Cited by 46 publications

References 10 publications

Optimal Virtual Monochromatic Images for Evaluation of Normal Tissues and Head and Neck Cancer Using Dual-Energy CT

Optimal Virtual Monochromatic Images for Evaluation of Normal Tissues and Head and Neck Cancer Using Dual-Energy CT

Decreased stage migration rate of early gastric cancer with a new reconstruction algorithm using dual-energy CT images: a preliminary study

Virtual Monoenergetic Dual-Energy Computed Tomography

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