Free-breathing ultrashort echo time lung magnetic resonance imaging using stack-of-spirals acquisition: A feasibility study in oncology patients

2018 ◽  
Vol 51 ◽  
pp. 137-143 ◽  
Author(s):  
Min Jae Cha ◽  
Hyun Jeong Park ◽  
Mun Young Paek ◽  
Alto Stemmer ◽  
Eun Sun Lee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Feasibility Study ◽  
Free Breathing ◽  
Resonance Imaging ◽  
Oncology Patients ◽  
Ultrashort Echo Time ◽  
Echo Time

scholarly journals Accelerated Stack-of-Spirals Free-Breathing Three-Dimensional Ultrashort Echo Time Lung Magnetic Resonance Imaging: A Feasibility Study in Patients With Breast Cancer

2021 ◽  
Vol 11 ◽  
Author(s):  
Min Jae Cha ◽  
Hye Shin Ahn ◽  
Hyewon Choi ◽  
Hyun Jeong Park ◽  
Thomas Benkert ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Image Quality ◽  
Parallel Imaging ◽  
Three Dimensional ◽  
Free Breathing ◽  
Resonance Imaging ◽  
Ultrashort Echo Time ◽  
Echo Time

PurposeTo investigate the clinical feasibility of accelerated free-breathing stack-of-spirals (spiral) three-dimensional (3D) ultrashort echo time (UTE) lung magnetic resonance imaging (MRI) using iterative self‐consistent parallel imaging reconstruction from arbitrary k‐space (SPIRiT) algorithm in patients with breast cancer.MethodsThe institutional review board approved this prospective study and patients’ informed consents were obtained. Between June and August 2018, 29 female patients with breast cancer underwent 3-T MRI including accelerated free-breathing spiral 3D UTE (0.98-mm isotropic spatial resolution; echo time, 0.05 msec) of the lungs and thin-section chest computed tomography (CT). Two radiologists evaluated the image quality and pulmonary nodules on MRI were assessed and compared, CT as a reference.ResultsThe pulmonary vessels and bronchi were visible consistently up to the sub-sub-segmental and sub-segmental branch levels, respectively, on accelerated spiral 3D UTE. The overall image quality was evaluated as good and excellent for 70.7% of accelerated spiral 3D UTE images (reviewer [R]1, 72.4% [21/29]; R2, 69.0% [20/29]) and acceptable for 20.7% (both R1 and R2, 20.7% [6/29]). Five patients on CT revealed 141 pulmonary metastatic nodules (5.3 ± 2.6 mm); the overall nodule detection rate of accelerated spiral 3D UTE was sensitivity of 90.8% (128/141), accuracy of 87.7%, and positive predictive value of 96.2%. In the Bland-Altman plot analysis comparing nodule size between CT and MRI, 132/141 nodules (93.6%) were inside the limits of agreement.ConclusionAccelerated free-breathing spiral 3D UTE using the SPIRiT algorithm could be a potential alternative to CT for oncology patients.

Three-dimensional ultrashort echo time cones (3D UTE-Cones) magnetic resonance imaging of entheses and tendons

2018 ◽  
Vol 49 ◽  
pp. 4-9 ◽  
Author(s):  
Bimin Chen ◽  
Yinghua Zhao ◽  
Xin Cheng ◽  
Yajun Ma ◽  
Eric Y. Chang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
Resonance Imaging ◽  
Ultrashort Echo Time ◽  
Echo Time

scholarly journals Volumetric imaging of myelin in vivo using 3D inversion recovery‐prepared ultrashort echo time cones magnetic resonance imaging

2020 ◽  
Vol 33 (10) ◽  
Author(s):  
Ya‐Jun Ma ◽  
Adam C. Searleman ◽  
Hyungseok Jang ◽  
Shu‐Juan Fan ◽  
Jonathan Wong ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Inversion Recovery ◽  
Resonance Imaging ◽  
3D Inversion ◽  
Ultrashort Echo Time ◽  
Volumetric Imaging ◽  
Echo Time

scholarly journals Ultrashort echo time (UTE) magnetic resonance imaging of myelin: technical developments and challenges

2020 ◽  
Vol 10 (6) ◽  
pp. 1186-1203 ◽  
Author(s):  
Ya-Jun Ma ◽  
Hyungseok Jang ◽  
Eric Y. Chang ◽  
Annie Hiniker ◽  
Brian P. Head ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Ultrashort Echo Time ◽  
Technical Developments ◽  
Echo Time

scholarly journals Magnetic Resonance Imaging of Hard Tissues and Hard Tissue Engineered Bio-substitutes

2019 ◽  
Vol 21 (6) ◽  
pp. 1003-1019 ◽  
Author(s):  
Simone Mastrogiacomo ◽  
Weiqiang Dou ◽  
John A. Jansen ◽  
X. Frank Walboomers
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Resonance Imaging ◽  
Hard Tissue ◽  
Comprehensive Overview ◽  
Ultrashort Echo Time ◽  
Dental Tissues ◽  
Hard Tissues ◽  
Echo Time

Abstract Magnetic resonance imaging (MRI) is a non-invasive diagnostic imaging tool based on the detection of protons into the tissues. This imaging technique is remarkable because of high spatial resolution, strong soft tissue contrast and specificity, and good depth penetration. However, MR imaging of hard tissues, such as bone and teeth, remains challenging due to low proton content in such tissues as well as to very short transverse relaxation times (T2). To overcome these issues, new MRI techniques, such as sweep imaging with Fourier transformation (SWIFT), ultrashort echo time (UTE) imaging, and zero echo time (ZTE) imaging, have been developed for hard tissues imaging with promising results reported. Within this article, MRI techniques developed for the detection of hard tissues, such as bone and dental tissues, have been reviewed. The main goal was thus to give a comprehensive overview on the corresponding (pre-) clinical applications and on the potential future directions with such techniques applied. In addition, a section dedicated to MR imaging of novel biomaterials developed for hard tissue applications was given as well.

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