Results 41 to 50 of about 6,942,219 (182)

Noise reduction in dual‐energy computed tomography virtual monoenergetic imaging

Journal of Applied Clinical Medical Physics, 2019
AbstractPurposeVirtual monoenergetic images (VMIs) derived from dual‐energy computed tomography (DECT) have been explored for several clinical applications in recent years. However, VMIs at low and high keVs have high levels of noise. The aim of this study was to reduce image noise in VMIs by using a two‐step noise reduction technique.MethodsVMI was ...
Liu, Chi‐Kuang, Huang, Hsuan‐Ming
openaire   +2 more sources

Dual-energy CT with virtual monoenergetic images to improve the visualization of pancreatic supplying arteries: the normal anatomy and variations

Insights into Imaging, 2022
Background Pancreatic ductal adenocarcinoma (PDAC) remains a malignancy with poor prognosis, appropriate surgical resection and neoadjuvant therapy depend on the accurate identification of pancreatic supplying arteries.
Hong-wei Liang, Yang Zhou, Zhi-wei Zhang, Gao-wu Yan, Si-lin Du, Xiao-hui Zhang, Xin-you Li, Fa-jin Lv, Qiao Zheng, Yong-mei Li   +9 more
doaj   +1 more source

Dual-Energy CT for the Detection of Portal Vein Thrombosis: Improved Diagnostic Performance Using Virtual Monoenergetic Reconstructions

Diagnostics, 2022
Purpose: To investigate the diagnostic performance of noise-optimized virtual monoenergetic images (VMI+) in dual-energy CT (DECT) of portal vein thrombosis (PVT) compared to standard reconstructions.
Simon S. Martin, Jetlir Kolaneci, Rouben Czwikla, Christian Booz, Leon D. Gruenewald, Moritz H. Albrecht, Zachary M. Thompson, Lukas Lenga, Ibrahim Yel, Thomas J. Vogl, Julian L. Wichmann, Vitali Koch   +11 more
doaj   +1 more source

Principles and Applications of Dual-Layer Spectral CT in Gastrointestinal Imaging

Diagnostics, 2023
The advance in technology allows for the development of different CT scanners in the field of dual-energy computed tomography (DECT). In particular, a recently developed detector-based technology can collect data from different energy levels, thanks to ...
Paolo Niccolò Franco, Chiara Maria Spasiano, Cesare Maino, Elena De Ponti, Maria Ragusi, Teresa Giandola, Simone Terrani, Marta Peroni, Rocco Corso, Davide Ippolito   +9 more
doaj   +1 more source

Detector-based spectral CT with a novel dual-layer technology: principles and applications

Insights into Imaging, 2017
Detector-based spectral computed tomography is a novel dual-energy CT technology that employs two layers of detectors to simultaneously collect low- and high-energy data in all patients using standard CT protocols.
Negin Rassouli, Maryam Etesami, Amar Dhanantwari, Prabhakar Rajiah   +3 more
doaj   +1 more source

Radiobiological studies with monoenergetic neutrons [PDF]

, 1973
The Radiological Research Accelerator Facility (RARAF) has the capability of producing essentially monoenergetic neutron beams, ranging in energy from 16.4 MeV down to 220 keV.
Rossi, H. H., Kellerer, Albrecht M., Goodman, L. J., Marino, S., Hall, E. J.   +4 more
core   +1 more source

Dual-energy computed tomography with new virtual monoenergetic image reconstruction enhances prostate lesion image quality and improves the diagnostic efficacy for prostate cancer

BMC Medical Imaging
Background Prostate cancer is one of the most common malignant tumors in middle-aged and elderly men and carries significant prognostic implications, and recent studies suggest that dual-energy computed tomography (DECT) utilizing new virtual ...
Nina Fan, Xiaofeng Chen, Yulin Li, Zhiqiang Zhu, Xiangguang Chen, Zhiqi Yang, Jiada Yang   +6 more
doaj   +1 more source

Low tube voltage increases the diagnostic performance of dual-energy computed tomography in patients with acute appendicitis

Diagnostic and Interventional Radiology, 2019
PURPOSEWe aimed to assess the utility of dual-energy computed tomography (DECT) imaging in diagnosing acute appendicitis (AA) with density measurements of the appendix vermiformis.METHODSA total of 210 consecutive patients presenting with acute abdominal
Çağdaş Topel, Mehmet Ruhi Onur, Erhan Akpınar, Ali Devrim Karaosmanoğlu, Deniz Akata, Muşturay Karçaaltıncaba   +5 more
doaj   +1 more source

Assessment of quantitative information for radiation therapy at a first-generation clinical photon-counting computed tomography scanner

Frontiers in Oncology, 2022
As one of the latest developments in X-ray computed tomography (CT), photon-counting technology allows spectral detection, demonstrating considerable advantages as compared to conventional CT.
Guyue Hu, Katharina Niepel, Franka Risch, Christopher Kurz, Matthias Würl, Thomas Kröncke, Florian Schwarz, Florian Schwarz, Katia Parodi, Guillaume Landry, Guillaume Landry, Guillaume Landry   +11 more
doaj   +1 more source

Phantom evaluation of small‐pixel effect in ultra‐high‐resolution photon‐counting CT: Noise texture and high‐contrast spatial resolution

Journal of Applied Clinical Medical Physics, Volume 27, Issue 9, September 2026.
Abstract Background Ultra‐high‐resolution (UHR) photon‐counting CT (PCCT) with small‐pixel detectors improves resolution and noise, but its dependence on diverse imaging conditions remains insufficiently characterized. Purpose To systematically evaluate the small‐pixel effect in UHR PCCT by assessing noise properties and high‐contrast spatial ...
Kyu‐Ho Song, Colin Shan, Gary Xu, Xinhui Duan, Yue Zhang, Kuan Zhang, Liqiang Ren   +6 more
wiley   +1 more source