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Congress: ECR25
Poster Number: C-19491
Type: Poster: EPOS Radiologist (educational)
Authorblock: Y. Y. Yuruk, M. Simsar, H. Şahin, Y. Pekçevik; Izmir/TR
Disclosures:
Yesim Yekta Yuruk: Nothing to disclose
Mehmet Simsar: Nothing to disclose
Hilal Şahin: Nothing to disclose
Yeliz Pekçevik: Nothing to disclose
Keywords: Head and neck, MR physics, Musculoskeletal bone, MR, Education, Imaging sequences, Physics, Education and training
Learning objectives Explanation and illustrative description of the Zero-Echo-Time sequence with MRI physics Explanation of the sequence features on 1,5 Tesla and 3 Tesla MRI Evaluation of the clinical feasibility of the Zero-Echo-Time sequence with cases
Read more Background Magnetic Resonance Imaging (MRI) is a non-invasive imaging modality that provides high soft-tissue contrast and resolution of the body structures without ionized radiation. However, conventional MRI sequences are less successful than Computed Tomography (CT) in depicting the bone cortex and calcified structures. Zero echo-time (ZTE) sequence is the newest magnetic resonance imaging technique that uses ultra-fast readouts to capture signals from ultrashort-T2 tissues and aims to image cortical bone and calcific structures. Besides providing “CT-like” images, ZTE-MRI has additional benefits such...
Read more Findings and procedure details MRI physics: The physics underlying image acquisition in the Zero-Echo-Time sequenceIn contrast to conventional MRI modalities, the ZTE sequence prioritizes imaging of tissues with ultrashort T2 relaxation times, such as bone tissues. Therefore, CT-like images can be obtained from these tissues, which are seen as signal-void areas in conventional MRI (Figure 1).In the ZTE sequence, readout gradients are ramped before the radiofrequency pulse to ensure immediate data acquisition after stimulation. A readout period is started immediately after the radiofrequency (RF)...
Read more Conclusion Zero echo-time (ZTE) Magnetic Resonance Imaging (MRI) sequence is the newest imaging technique aiming to image cortical bone and calcific structures without using ionized radiation. Thanks to the ZTE sequence, radiation-free CT-like images obtained with silent scanning, artifact resistance, and short acquisition times offer significant advantages for pediatric patients, pregnant patients, metastasis screening, and patients with genetic disorders who should avoid radiation exposure. The capability to acquire thin-section images similar to CT, utilize in the whole-body MRI, and obtain MRI images...
Read more References Papp D, Castillo T JM, Wielopolski PA, Ciet P, Veenland JF, Kotek G, Hernandez-Tamames J. Deep learning for improving ZTE MRI images in free breathing. Magn Reson Imaging. 2023 May;98:97-104. doi: 10.1016/j.mri.2023.01.019. Epub 2023 Jan 18. PMID: 36681310. Ljungberg E, Damestani NL, Wood TC, Lythgoe DJ, Zelaya F, Williams SCR, Solana AB, Barker GJ, Wiesinger F. Silent zero TE MR neuroimaging: Current state-of-the-art and future directions. Prog Nucl Magn Reson Spectrosc. 2021 Apr;123:73-93. doi: 10.1016/j.pnmrs.2021.03.002. Epub 2021 Mar 26. PMID: 34078538;...
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