Code R F, Harrison J E, McNeill K G, Szyjkowski M
Department of Physics, University of Toronto, Canada.
Magn Reson Med. 1990 Mar;13(3):358-69. doi: 10.1002/mrm.1910130303.
19F free induction decay (FID) signals have been observed from the index fingers of four male and two female adult volunteers using a 27-MHz pulsed nuclear magnetic resonance spectrometer equipped with a split ring resonator probe. The value of the in vivo spin-lattice relaxation time T1 of the fluoride ions naturally accumulated in bone mineral has been determined to be 2.0 +/- 0.3 s. The shape of the observed FID signals in the inhomogeneous external magnetic field indicates that the F distribution is not uniform along the length of the finger. The fluoride ion content of the index finger (within a 65-mm length from its distal end) was measured with a sensitivity of +/- 0.5 mg F within a 30-min observation time.
使用配备有裂环谐振器探头的27兆赫脉冲核磁共振光谱仪，已从4名成年男性和2名成年女性志愿者的食指中观测到19F自由感应衰减（FID）信号。已确定天然积累在骨矿物质中的氟离子的体内自旋晶格弛豫时间T1值为2.0 +/- 0.3秒。在不均匀外磁场中观测到的FID信号形状表明，F沿手指长度方向的分布并不均匀。在30分钟的观测时间内，测量了食指（从其远端起65毫米长度范围内）的氟离子含量，灵敏度为+/- 0.5毫克F。
