Journal ArticleDOI
Clinical Evaluation of Silent T1-Weighted MRI and Silent MR Angiography of the Brain.
Samantha J. Holdsworth,Samantha J. Holdsworth,Sarah J Macpherson,Kristen W. Yeom,Max Wintermark,Greg Zaharchuk +5 more
TLDR
Comparison of Silent T1-weighted and unenhanced MR angiography (MRA) against conventional sequences in a clinical population suggested that it requires additional refinement before routine clinical use.Abstract:
OBJECTIVE. New MRI sequences based on rapid radial acquisition have reduced gradient noise. The purpose of this study was to compare Silent T1-weighted and unenhanced MR angiography (MRA) against conventional sequences in a clinical population. MATERIALS AND METHODS. The study cohort consisted of 40 patients with suspected brain metastases (median age, 60 years; range, 23–91 years) who underwent T1-weighted contrast-enhanced MRI and 51 patients with suspected vascular lesions or cerebral ischemia (median age, 60 years; range, 16–94 years) who underwent unenhanced intracranial MRA. Three neuroradiologists reviewed the images blindly and rated several measures of image quality on a 5-point Likert scale. Reviewers recorded the number of enhancing lesions and whether Silent images were better than, worse than, or equivalent to conventional images. RESULTS. For T1-weighted MR images, ratings were slightly lower for Silent versus conventional images, except for diagnostic confidence. Although more lesions were ...read more
Citations
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Journal ArticleDOI
Noncontrast MR angiography: An update.
TL;DR: The motivations for using noncontrast MRA, potential contrast mechanisms, imaging techniques, advantages, and drawbacks with respect to CTA and CEMRA, and the level of evidence for using the various MRA techniques are considered.
Journal ArticleDOI
Comparison of lung imaging using three-dimensional ultrashort echo time and zero echo time sequences: preliminary study
Kyungsoo Bae,Kyung Nyeo Jeon,Moon Jung Hwang,Joon Sung Lee,Ji Young Ha,Kyeong Hwa Ryu,Ho Cheol Kim +6 more
TL;DR: Implementing ZTE as an additional sequence in routine lung MR is feasible and ZTE can provide high-resolution pulmonary structural information with better SNR and CNR using shorter time than UTE.
Journal ArticleDOI
Zero TE MRI for Craniofacial Bone Imaging
A. Lu,K.R. Gorny,Mai-Lan Ho +2 more
TL;DR: Preliminary experience with zero TE MR imaging is discussed, including technical principles and a clinical case series demonstrating emerging applications in neuroradiology, as a promising radiation-free alternative to CT with rapid, high-resolution, silent, and artifact-resistant imaging.
Journal ArticleDOI
Pointwise Encoding Time Reduction with Radial Acquisition with Subtraction-Based MRA during the Follow-Up of Stent-Assisted Coil Embolization of Anterior Circulation Aneurysms
Young Jin Heo,Hae Woong Jeong,Jin Wook Baek,Sung Tae Kim,Y.G. Jeong,Juwhan Lee,Sung-Chul Jin +6 more
TL;DR: PETRA qMRA is a useful follow-up technique for patients who have undergone stent-assisted coil embolization for anterior circulation aneurysms, and the mean score for flow visualization within the stents was significantly higher in PETRAqMRA than in TOF-MRA.
Journal ArticleDOI
Usefulness of Noncontrast-Enhanced Silent Magnetic Resonance Angiography (MRA) for Treated Intracranial Aneurysm Follow-up in Comparison with Time-of-Flight MRA.
Kyeong Hwa Ryu,Hye Jin Baek,Jin Il Moon,Bo Hwa Choi,Sung Eun Park,Ji Young Ha,Hyun Oh Park,Seung Soo Kim,Jung-Soo Kim,Soo Buem Cho,Michael Carl +10 more
TL;DR: Silent MRA can be useful to evaluate treated intracranial aneurysms during follow-up without radiation exposure and use of contrast material and is characterized by higher diagnostic performance and superior visualization for the treated site.
References
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Journal ArticleDOI
Arterial Spin-Label Imaging in Patients with Normal Bolus Perfusion-weighted MR Imaging Findings: Pilot Identification of the Borderzone Sign
Greg Zaharchuk,Roland Bammer,Matus Straka,Ajit Shankaranarayan,David C. Alsop,Nancy J. Fischbein,Scott W. Atlas,Michael E. Moseley +7 more
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