Academic Journal
Triple‐tuned birdcage and single‐tuned dipole array for quadri‐nuclear head MRI at 7 T
| العنوان: | Triple‐tuned birdcage and single‐tuned dipole array for quadri‐nuclear head MRI at 7 T |
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| المؤلفون: | Paška, Jan, Wang, Bili, Chen, Anna M., Madelin, Guillaume, Brown, Ryan |
| المساهمون: | National Institute of Biomedical Imaging and Bioengineering |
| المصدر: | Magnetic Resonance in Medicine ; volume 91, issue 5, page 2188-2199 ; ISSN 0740-3194 1522-2594 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2023 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | Purpose The purpose of this work was to design and build a coil for quadri‐nuclear MRI of the human brain at 7 T. Methods We built a transmit/receive triple‐tuned (45.6 MHz for H, 78.6 MHz for Na, and 120.3 MHz for P) quadrature four‐rod birdcage that was geometrically interleaved with a transmit/receive four‐channel dipole array (297.2 MHz for H). The birdcage rods contained passive, two‐pole resonant circuits that emulated capacitors required for single‐tuning at three frequencies. The birdcage assembly also included triple‐tuned matching networks, baluns, and transmit/receive switches. We assessed the performance of the coil with quality factor (Q) and signal‐to‐noise ratio (SNR) measurements, and performed in vivo multinuclear MRI and MR spectroscopic imaging (MRSI). Results Q measurements showed that the triple‐tuned birdcage efficiency was within 33% of that of single‐tuned baseline birdcages at all three frequencies. The quadri‐tuned coil SNR was 78%, 59%, 44%, and 48% lower than that of single or dual‐tuned reference coils for H, H, Na, and P, respectively. Quadri‐nuclear MRI and MRSI was demonstrated in brain in vivo in about 30 min. Conclusion While the SNR of the quadruple tuned coil was significantly lower than dual‐ and single‐tuned reference coils, it represents a step toward truly simultaneous quadri‐nuclear measurements. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/mrm.29977 |
| الاتاحة: | http://dx.doi.org/10.1002/mrm.29977 https://onlinelibrary.wiley.com/doi/pdf/10.1002/mrm.29977 |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.A21B9311 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/mrm.29977 |
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