Article
Biophysics
Ashmita De, Justin Grenier, Alan H. Wilman
Summary: This study developed a technique for combined time-of-flight MR angiography and quantitative susceptibility mapping, enabling simultaneous imaging using multiple methods. The results showed that accurate susceptibility values can still be obtained from this sequence, despite some signal-to-noise ratio loss.
NMR IN BIOMEDICINE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Zhang Shi, Xueying Zhao, Shuo Zhu, Xiyin Miao, Yunfei Zhang, Shihong Han, Bei Wang, Boyu Zhang, Xiaodan Ye, Yongming Dai, Caizhong Chen, Shengxiang Rao, Jiang Lin, Mengsu Zeng, He Wang
Summary: This study evaluated the image quality and cerebrovascular visualization of 5-T 3D TOF MRA for visualizing intracranial small branch arteries. The results showed that 5-T MRA had significantly better visualization of distal arteries and small vessels compared to 3 T MRA. There was no significant difference in image quality and quantitative measurements between 5 T and 7 T.
Article
Clinical Neurology
Jae Ho Kim, Sung Jun Ahn, Mina Park, Yong Bae Kim, Bio Joo, Woosung Lee, Sang Hyun Suh
Summary: This study compared the imaging quality and visibility of clip-adjacent arteries between pointwise encoding time reduction with radial acquisition (PETRA) subtraction-based MRA and time-of-flight magnetic resonance angiography (TOF-MRA). The results showed that PETRA-MRA had acceptable image quality and greater visibility of the adjacent vessels near the clipped aneurysms compared to TOF-MRA. PETRA-MRA could be a beneficial alternative for follow-up imaging of clipped aneurysms.
JOURNAL OF NEUROSURGERY
(2022)
Article
Clinical Neurology
Filiz Osmanodja, Jan F. Scheitz, Jochen B. Fiebach, Ramanan Ganeshan, Kersten Villringer
Summary: The study found that intracranial time-of-flight (TOF) MRA can be a valuable diagnostic tool for predicting extracranial stenosis of the internal carotid artery (ICA).
JOURNAL OF NEUROLOGY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Paul Soullie, Alexia Missoffe, Khalid Ambarki, Jacques Felblinger, Freddy Odille
Summary: This method develops a fast and easy-to-use electrical properties tomography based on a single MR scan, avoiding the need for a B-1 map and transceive phase assumption, and robust against noise. It reconstructs conductivity and permittivity from a new partial differential equation involving RF fields and derivatives, showing advantages over existing methods in various simulation and experimental settings. The method's validity and versatility are demonstrated, promising as a new step forward for clinical applications.
MAGNETIC RESONANCE IN MEDICINE
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Sung-Hye You, Yongwon Cho, Byungjun Kim, Kyung-Sook Yang, Bo Kyu Kim, Sang Eun Park
Summary: This study developed a deep learning model based on cycle-consistent generative adversarial network (cycleGAN) to generate synthetic time-of-flight (synTOF) images using PETRA. The results showed that synTOF had better image quality, noise, sharpness, and vascular conspicuity compared to PETRA, with no significant difference compared to TOF.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Article
Engineering, Biomedical
Dongjun Choi, Tackeun Kim, Jinhee Jang, Leonard Sunwoo, Kyong Joon Lee
Summary: This study proposes a novel automatic method to detect steno-occlusive lesions in sequential transverse slices on time-of-flight magnetic resonance angiography. The method uses end-to-end multi-task learning to simultaneously detect lesions and segment blood vessels. Experimental results demonstrate improved lesion prediction and localization performance by incorporating blood vessel extraction.
COMPUTERIZED MEDICAL IMAGING AND GRAPHICS
(2023)
Article
Pharmacology & Pharmacy
Ni Zhang, Lichong Zhu, Qiuhong Ouyang, Saisai Yue, Yichun Huang, Shuang Qu, Runwei Li, Yuanyuan Qiao, Man Xu, Fangfei He, Bin Zhao, Lai Wei, Xiaoai Wu, Peisen Zhang
Summary: Polymyxin B exerts bactericidal effects on Gram-negative bacteria but its clinical application is hindered by its toxicity and side effects. Further research is needed to understand its impact on the physiological states of the central nervous system.
FRONTIERS IN PHARMACOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Christof Boehm, Marianne Goeger-Neff, Hendrik T. Mulder, Benjamin Zilles, Lars H. Lindner, Gerard C. van Rhoon, Dimitrios C. Karampinos, Mingming Wu
Summary: TFI performs better than previously suggested BFR methods in terms of accuracy and robustness. While PDF consistently overestimates susceptibility contribution, and LBV removes valuable pixel information, TFI is more robust and leads to more accurate temperature estimations.
MAGNETIC RESONANCE IN MEDICINE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Le Roy Chong, Kathy Lee, Fang Yang Sim
Summary: This article presents an overview of current 3D MRI approaches for imaging cortical bone with CT-like bone contrast, including ultrashort echo time, zero echo time, T1-weighted gradient recalled echo, susceptibility-weighted imaging, and deep learning techniques. The focus of recent research has been on improving the ability of 3D MRI to provide high-resolution images of cortical bone with CT-like bone contrast. The ability of 3D MRI to deliver cortical bone information with similar diagnostic performance to CT would simplify evaluation and obviate radiation exposure.
EUROPEAN JOURNAL OF RADIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Shiori Amemiya, Naoyuki Takei, Tsuyoshi Ueyama, Keita Fujii, Hidemasa Takao, Koichiro Yasaka, Yusuke Watanabe, Kouhei Kamiya, Osamu Abe
Summary: This study developed an accelerated cervical MRA and evaluated its diagnostic performance. The results showed that FLEXA had significantly higher artery-to-background signal ratio, lower image blurring, and better diagnostic performance for luminal abnormalities and plaques compared to cMRA.
JOURNAL OF MAGNETIC RESONANCE IMAGING
(2022)
Article
Oncology
Sivakami Avadiappan, Melanie A. Morrison, Angela Jakary, Erin Felton, Schuyler Stoller, Christopher P. Hess, Annette M. Molinaro, Steve E. Braunstein, Sabine Mueller, Janine M. Lupo
Summary: This study on young adult survivors of pediatric brain tumors treated with different radiation therapies found that arterial volume decreased and proportion of smaller vessels increased in patients treated with whole-brain radiation. The presence of cerebral microbleeds was associated with reduced arterial volume and decreased cognitive performance. These vascular-derived metrics could potentially serve as non-invasive markers of treatment-induced injury and cognitive impairment in pediatric brain tumor patients.
JOURNAL OF NEURO-ONCOLOGY
(2021)
Article
Health Care Sciences & Services
Sun Ah Heo, Eun Soo Kim, Yul Lee, Sang Min Lee, Kwanseop Lee, Dae Young Yoon, Young-Su Ju, Mi Jung Kwon
Summary: Non-pathological opacification of the cavernous sinus (CS) on brain CTA can show asymmetry with flow-related signal intensity (FRSI) on TOF-MRA due to anatomical variance, but there is minimal reliable association between the two imaging modalities.
Article
Clinical Neurology
Bryan A. Lanzman, Yuhao Huang, Edward H. Lee, Michael Iv, Michael E. Moseley, Samantha J. Holdsworth, Kristen W. Yeom
Summary: The study found that pTOF generated from 3D ME-GRE had some differences in diagnostic performance compared to cTOF, but a similar number of lesions were reported between the two. cTOF had higher scores in lesion conspicuity and diagnostic confidence.
Editorial Material
Clinical Neurology
Monique Boukobza, Xavier Duval, Jean -Pierre Laissy
Summary: SWAN sequence can accurately identify intracranial infectious aneurysms (IIAs) in patients with infective endocarditis (IE), providing crucial information on the risk of IIA rupture, follow-up after treatment, and selection for conventional angiography. Further research is needed to explore the role of SWAN in detecting IIAs.
WORLD NEUROSURGERY
(2021)