Results 151 to 160 of about 14,640 (199)

Lung CT Synthesis Using GANs with Conditional Normalization on Registered Ultrashort Echo-Time MRI

IEEE International Symposium on Biomedical Imaging, 2023
In clinical practice, the modality of choice for lung diagnosis is usually computed tomography (CT), which exposes patients to ionizing radiations and could potentially affect patients’ health.
Arthur Longuefosse, G. Dournes, I. Benlala, B. D. Senneville, F. Laurent, P. Desbarats, F. Baldacci   +6 more
semanticscholar   +1 more source

Imaging lung water redistribution using 0.55T ultrashort echo time MRI

ISMRM Annual Meeting, 2023
Quantification of changes in lung water using MRI may provide clinical value in early diagnosis of heart failure. In this study, we demonstrate the ability of our 3D free-breathing spiral ultrashort-TE sequence to quantify and capture changes in lung water using a high-performance 0.55T MRI system.
Felicia Seemann, Ahsan Javed, Rachel Chae, Amanda Potersnak, Scott Baute, Kendall O’Brien, Rajiv Ramasawmy, Robert Lederman, Adrienne Campbell-Washburn   +8 more
openaire   +1 more source

CT substitute derived from MRI sequences with ultrashort echo time

Medical Physics, 2011
Methods for deriving computed tomography (CT) equivalent information from MRI are needed for attenuation correction in PET/MRI applications, as well as for patient positioning and dose planning in MRI based radiation therapy workflows. This study presents a method for generating a drop in substitute for a CT image from a set of magnetic resonance (MR ...
Adam Johansson, Mikael Karlsson, Tufve Nyholm   +2 more
openaire   +3 more sources

Ultrashort echo time (UTE) MRI of the spine in thalassaemia

The British Journal of Radiology, 2004
Back pain is common in adult patients with homozygous thalassaemia, and degenerative disc disease is increasingly recognised as a cause. Ultrashort echo time (UTE) pulse sequences, which are sensitive to the presence of short T(2) relaxation components in tissue produced by iron deposition and other processes, were used to examine the lower thoracic ...
M A, Hall-Craggs, J, Porter, P D, Gatehouse, G M, Bydder   +3 more
openaire   +2 more sources

3D Automated Segmentation of Bronchial Abnormalities on Ultrashort Echo Time MRI: A Quantitative MR Outcome in Cystic Fibrosis.

Journal of Magnetic Resonance Imaging
BACKGROUND Cystic fibrosis (CF) monitoring relies on computed tomography (CT), but ultra-short echo time MRI (UTE-MRI) offers a radiation-free alternative.
Amel Imene Hadj Bouzid, I. Benlala, B. D. de Senneville, F. Baldacci, J. Macey, Wadie Benhassen, Pan Su, S. Bui, Maéva Zysman, Aurélien Bustin, P. Berger, G. Dournes   +11 more
semanticscholar   +1 more source

3D ultrashort echo time MRI of the lung using stack‐of‐spirals and spherical k‐Space coverages: Evaluation in healthy volunteers and parenchymal diseases

Journal of Magnetic Resonance Imaging, 2018
Ultrashort echo time (UTE) has been shown to improve lung MRI quality in three dimensions. The evaluation of 3D‐UTE stack‐of‐spirals VIBE (3D‐USV) sequence for parenchymal diseases and a comparison of performance with that of a spherical mode of ...
G. Dournes, J. Yazbek, Wadie Benhassen, I. Benlala, E. Blanchard, M. Truchetet, J. Macey, P. Berger, F. Laurent   +8 more
semanticscholar   +1 more source

Quantification of Lung Ventilation Using Four‐Dimensional Dynamic Ultrashort Echo Time MRI for Differentiating Preserved Ratio Impaired Spirometry From Non‐Chronic Obstructive Pulmonary Disease Subjects

Journal of Magnetic Resonance Imaging
Radiation‐free four‐dimensional (4D) dynamic ultrashort echo time MRI (UTE MRI) enables quantification of ventilation defects in chronic obstructive pulmonary disease (COPD) and preserved ratio impaired spirometry (PRISm) populations.
Ziwei Zhang, Jie Li, Zekang Ding, Yi Xia, Song Jiang, MeiLing Xu, Zijun Wu, H. She, Shiyuan Liu, Yiping P. Du, Li Fan   +10 more
semanticscholar   +1 more source

Quantitative Ultrashort Echo Time MRI for Evaluation of Sciatic Nerve Degeneration and Regeneration in Rat Models.

Radiology
Background Evaluating peripheral nerve response after injury or repair remains a critical clinical challenge. Current medical imaging approaches provide limited insight into the degenerative or regenerative environment of affected nerves.
Yuanshan Wu, Yajun Ma, Xin Cheng, Kaixin Pan, James Lo, Elisabeth Orozco, Junyuan Chen, S. Jerban, Michael P Andre, Jiang Du, Eric Y. Chang, Sameer B Shah   +11 more
semanticscholar   +1 more source

Reproducibility of non-contrast enhanced multi breath-hold ultrashort echo time functional lung MRI

Magnetic Resonance Imaging, 2023
To evaluate the intraindividual reproducibility of functional lung imaging using non-contrast enhanced multi breath-hold 3D-UTE MRI.Ten healthy volunteers underwent non-contrast enhanced 3D-UTE MRI at three time points for same-day and different-day measurements employing a stack-of-spirals trajectory at 3 T.
C, Metz, A M, Weng, J F, Heidenreich, A, Slawig, T, Benkert, H, Köstler, S, Veldhoen   +6 more
openaire   +2 more sources

Retrospectively gated ultrashort‐echo‐time MRI T1 mapping reveals compromised pulmonary microvascular NO‐dependent function in a murine model of acute lung injury

NMR in Biomedicine
This study sought to develop noninvasive, in vivo imaging schemes that allow for quantitative assessment of pulmonary microvascular functional status based on the combination of pulmonary T1 mapping and dynamic contrast‐enhanced (DynCE) imaging.
Grzegorz Kwiatkowski, I. Czyżyńska-Cichoń, B. Tielemans, Lotte Geerkens, A. Jasztal, G. Velde, S. Chlopicki   +6 more
semanticscholar   +1 more source