Sensitivity of an Eight-element Phased Array Coil in 3 Tesla MR Imaging : A Basic Analysis
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概要
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Purpose: To evaluate the performance advantages of an 8-element phased array head coil (8 ch coil) over a conventional quadrature-type birdcage head coil (QD coil) with regard to the signal-to-noise ratio (SNR) and image uniformity in 3 Tesla magnetic resonance (MR) imaging. Materials and Methods: We scanned a phantom filled with silicon oil using an 8 ch coil and a QD coil in a 3T MR imaging system and compared the SNR and image uniformity obtained from T1-weighted spin echo (SE) images and T2-weighted fast SE images between the 2 coils. We also visually evaluated images from 4 healthy volunteers. Results: The SNR with the 8 ch coil was approximately twice that with the QD coil in the region of interest (ROI), which was set as 75% of the area in the center of the phantom images. With regard to the spatial variation of sensitivity, the SNR with the 8 ch coil was lower at the center of the images than at the periphery, whereas the SNR with the QD coil exhibited an inverse pattern. At the center of the images with the 8 ch coil, the SNR was somewhat lower, and that distribution was relatively flat compared to that in the periphery. Image uniformity varied less with the 8 ch coil than with the QD coil on both imaging sequences. Conclusion: The 8 ch phased array coil was useful for obtaining high quality 3T images because of its higher SNR and improved image uniformity than those obtained with conventional quadrature-type birdcage head coil.
- 日本磁気共鳴医学会の論文
- 2007-10-01
著者
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Mochizuki T
Division Of Anti-aging And Genomics Ehime Proteo-medicine Research Center
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Mochizuki T
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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KIKUCHI Keiichi
Department of Radiology, Ehime University Graduate School of Medicine
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MIKI Hitoshi
Department of Radiology, Ehime University Graduate School of Medicine
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Sadamoto Kazuhiko
Department of Neurosurgery, Washokai Sadamoto Hospital
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Mochizuki Teruhito
Department of Diagnostic and Therapeutic Radiology, Ehime University Graduate School of Medicine
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Mochizuki Teruhito
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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HIRATSUKA Yoshiyasu
Department of Radiology, Ehime University School of Medicine Shitsukawa
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KIRIYAMA Ikuko
Department of Radiology, Ehime University School of Medicine Shitsukawa
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TAKAHASHI Shizue
Department of Radiology, Ehime National Hospital
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Miki Hitoshi
Department Of Radiology Ehime University Graduate School Of Medicine
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Kiriyama Ikuko
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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Miki Hitoshi
Department Of Cardiology Ehime Prefectural Imabari Hospital
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Miki Tetsuro
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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Mochizuki Teruhito
Department Of Cardiology Matsuyama Red Cross Hospital
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Kikuchi Keiichi
Department Of Radiology Ehime University Graduate School Of Medicine
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Kikuchi Keiichi
Department Of Diagnostic And Therapeutic Radiology Ehime University Graduate School Of Medicine
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Takahashi Shizue
Department Of Radiology Ehime National Hospital
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Sadamoto Kazuhiko
Department Of Neurosurgery Washo-kai Sadamoto Hospital
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Sadamoto Kazuhiko
Department Of Internal Medicine Washokai Sadamoto Hospital
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Miyazaki T
Department Of Pathology Ehime University School Of Medicine
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Hiratsuka Yoshiyasu
Department Of Radiology Ehime University School Of Medicine Shitsukawa
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Matayoshi Tetsutaro
Division Of Hypertension And Nephrology National Cardiovascular Center
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Kikuchi Keiichi
Department Of Radiology Ehime University School Of Medicine
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Miki Hitoshi
Department Of Radiology Ehime University School Of Medicine
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Matsuoka Hiroshi
Department Of Cardiology Prefectural Ehime Imabari Hospital
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Sadamoto Kazuhiko
Department Of Bone And Joint Surgery Ehime University Graduate School Of Medicine
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Mochizuki Teruhito
Department Of Pathology Ehime University School Of Medicine
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