Burnett K R, Wolf G L, Goldstein E J
Physiol Chem Phys Med NMR. 1985;17(1):123-9.
A series of experiments was performed to evaluate the accuracy and reproducibility of relaxation values obtained by two RADX table-top spectrometers operating at 5 MHz (R5) and 10 MHz (R10) respectively. The output (T1, T2, and proton content) of each machine was compared (for tissue specimens and paramagnetic solutions) to reference spectrometers. In the range of tissue T1's, R5 overestimates T1 by approx. 10% and R10 underestimates by approx. 23%. For tissue specimens, the T2 output of both machines is within 3% of the reference facility. Proton content values correlate well with the % wet weight of tissues (y = .46x + 24, r = .85) but accuracy deteriorates badly if tissue T1 greater than 400 msec or T2 greater than 300 msec. The output of both machines is accurate and reproducible within 5% over the range of tissue relaxation values (biological fluids excluded).
进行了一系列实验，以评估分别在5兆赫兹（R5）和10兆赫兹（R10）下运行的两台RADX台式光谱仪所获得的弛豫值的准确性和可重复性。将每台仪器的输出结果（T1、T2和质子含量）（针对组织样本和顺磁溶液）与参考光谱仪进行比较。在组织T1的范围内，R5高估T1约10%，R10低估约23%。对于组织样本，两台仪器的T2输出与参考设备的偏差在3%以内。质子含量值与组织的湿重百分比相关性良好（y = 0.46x + 24，r = 0.85），但如果组织T1大于400毫秒或T2大于300毫秒，准确性会严重下降。在组织弛豫值范围内（不包括生物流体），两台仪器的输出在5%以内是准确且可重复的。
