コイル選択の被写体サイズからみた検討(日本放射線技術学会第34回秋季学術大会)

概要

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We examined the index of coil selection in consideration of subject size to measure signal-to-noise ratio (SNR) and uniformity in a phantom experiment. The QD-Head, 8-channel-Head, and 8-channel-Head-Neck coil were used for head examination, QD-Body, 4-channel-TORSO, and 8-channel-Body coil were used for body examination. In the examination of the head, measurements were performed at various positions in a coil. The SNR measured by the QD-Head coil showed the highest values for 9cm or 12cm diameters of the phantom, and 10cm to 15cm distance from the coil entrance. The QD-Head coil also showed adequate uniformity at most sizes of phantoms. In the body examination, both multi-channel coils showed an SNR higher than the QD-Body coil for all sizes, but they were inferior to the QD-Body coil in uniformity. The 4-channnel-TORSO coil showed an SNR higher than the 8-channel-Body coil when a phantom with a diameter of 21cm or less was used. Since sensitivity distributions differ according to various cases, the 8-channel coil does not necessarily always show a high SNR. It is necessary to perform coil selection according to the subject's size and purpose.
社団法人日本放射線技術学会の論文
2006-09-20