Results 141 to 150 of about 6,942,219 (182)

Virtual monoenergetic imaging in photon-counting CT of the head and neck

Clinical Imaging, 2023
Advantages of virtual monoenergetic images (VMI) have been reported for dual energy CT of the head and neck, and more recently VMIs derived from photon-counting (PCCT) angiography of the head and neck. We report image quality metrics of VMI in a PCCT angiography dataset, expanding the anatomical regions evaluated and extending observer-based ...
Faraz, Farhadi, Pooyan, Sahbaee, Jayasai R, Rajagopal, Moozhan, Nikpanah, Babak, Saboury, Ralf, Gutjahr, Nadia M, Biassou, Ritu, Shah, Thomas G, Flohr, Ehsan, Samei, William F, Pritchard, Ashkan A, Malayeri, David A, Bluemke, Elizabeth C, Jones   +13 more
openaire   +2 more sources

The Impact of Virtual Monoenergetic Imaging on Visualization of the Cervical Spinal Canal

Journal of Computer Assisted Tomography, 2022
Rationale and Objectives Our purpose is to explore the role of dual-energy computed tomography (DECT) and virtual monoenergetic energy levels in reducing shoulder artifact to improve visualization of the cervical spinal canal.
David, McComiskey, Undrakh-Erdene, Erdenebold, Matthew D F, McInnes, Jean-Paul, Salameh, Robert, Chatelain, Carlos, Torres, Santanu, Chakraborty, Nader, Zakhari   +7 more
openaire   +2 more sources

Noise-optimized advanced image-based virtual monoenergetic imaging for improved visualization of lung cancer: Comparison with traditional virtual monoenergetic imaging

European Journal of Radiology, 2016
To assess the effect of a noise-optimized image-based virtual monoenergetic imaging (VMI+) algorithm in direct comparison with the traditional VMI technique and standard linearly-blended images emulating 120-kVp acquisition (M_0.3) on image quality at dual-energy CT in patients with lung cancer.Dual-source dual-energy CT examinations of 48 patients ...
Claudia Frellesen, Moritz Kaup, Julian L. Wichmann, Kristina Hüsers, Jan-Erik Scholtz, Moritz H. Albrecht, Sarah C. Metzger, Ralf W. Bauer, J. Matthias Kerl, Thomas Lehnert, Thomas J. Vogl, Boris Bodelle   +11 more
openaire   +2 more sources

Metal artifact reduction by dual-layer computed tomography using virtual monoenergetic images

European Journal of Radiology, 2017
The aim of the study was to investigate the performance and diagnostic value of metal artifact reduction in virtual monoenergetic images generated from dual-layer computed tomography (DLCT).35 patients that received a DLCT at the University Hospital Cologne and had an orthopedic implant in the examined region were included in this study.
Nils Große Hokamp, Anastasios Mpotsaris, David Maintz   +2 more
exaly   +3 more sources

Dual-energy computed tomography for evaluation of breast cancer: value of virtual monoenergetic images reconstructed with a noise-reduced monoenergetic reconstruction algorithm

Japanese Journal of Radiology, 2019
To evaluate the image quality and lesion visibility of virtual monoenergetic images (VMIs) reconstructed using a new monoenergetic reconstruction algorithm (nMERA) for evaluation of breast cancer.Forty-two patients with 46 breast cancers who underwent 4-phasic breast contrast-enhanced computed tomography (CT) using dual-energy CT (DECT) were enrolled ...
Mie Kurata, Megumi Matsuda, Akihiro Murata   +2 more
exaly   +3 more sources

Photon-counting detector coronary CT angiography: impact of virtual monoenergetic imaging and iterative reconstruction on image quality

The British Journal of Radiology, 2023
Objectives: To assess the impact of low kilo-electronvolt (keV) virtual monoenergetic image (VMI) energies and iterative reconstruction on image quality of clinical photon-counting detector coronary CT angiography (CCTA). Methods: CCTA with PCD-CT (prospective ECG-triggering, 120 kVp, automatic tube current modulation) was performed in a high-end ...
Sartoretti, Thomas, McDermott, Michael, Mergen, Victor, Euler, André, Schmidt, Bernhard, Jost, Gregor, Wildberger, Joachim E, Alkadhi, Hatem   +7 more
openaire   +3 more sources

Visibility of bronchial arteries using virtual and advanced virtual monoenergetic imaging.

Acta radiologica (Stockholm, Sweden : 1987), 2020
The utility of virtual monoenergetic imaging (VMI) for fine arteries has not been well clarified.To assess bronchial artery visualization using VMI and noise-optimized advanced VMI (VMI+).Eighty-seven patients with esophageal cancer underwent computed tomography (CT) using a third-generation dual-source system before surgery.
Takakiyo, Nomura, Tetsu, Niwa, Soji, Ozawa, Yutaka, Imai, Jun, Hashimoto   +4 more
openaire   +1 more source

Dual-Energy Computed Tomography Virtual Monoenergetic Imaging of Lung Cancer

Journal of Computer Assisted Tomography, 2016
The aim of the study was to evaluate objective and subjective image qualities of virtual monoenergetic imaging (VMI) in dual-source dual-energy computed tomography (DECT) and optimal kiloelectron-volt (keV) levels for lung cancer.Fifty-nine lung cancer patients underwent chest DECT. Images were reconstructed as VMI series at energy levels of 40, 60, 80,
Moritz, Kaup, Jan-Erik, Scholtz, Alexander, Engler, Moritz H, Albrecht, Ralf W, Bauer, J Matthias, Kerl, Martin, Beeres, Thomas, Lehnert, Thomas J, Vogl, Julian L, Wichmann   +9 more
openaire   +2 more sources

Phantom Validation of Spectral Detector Computed Tomography–Derived Virtual Monoenergetic, Virtual Noncontrast, and Iodine Quantification Images

Journal of Computer Assisted Tomography, 2018
Purpose Spectral detector computed tomography (SDCT) is a new CT technology that uses a dual-layer detector to perform energy separation. We aim to assess 3 clinical concepts using a phantom model: noise profile across the virtual monoenergetic (VME) spectrum, accuracy of iodine quantification, and virtual noncontrast (VNC ...
Lakshmi, Ananthakrishnan, Xinhui, Duan, Prabhakar, Rajiah, Todd C, Soesbe, Matthew A, Lewis, Yin, Xi, Julia R, Fielding, Robert E, Lenkinski, John R, Leyendecker, Suhny, Abbara   +9 more
openaire   +2 more sources

Reduction of beam hardening artifacts using virtual monoenergetic imaging

2017
Aims and objectives Methods and materials Results Conclusion Personal information ...
openaire   +1 more source