Hermanutz K D, Gebhardt M, Meurin G
Rofo. 1976 Aug;125(2):178-80. doi: 10.1055/s-0029-1230439.
The apparatus for measuring mineral equivalents described by Gebhardt, Heinen and Zwicker in 1973 was subjected to theoretical and experimental investigations; as a result, changes were introduced which significantly improved the basis for exact absorption measurments on phalanges. 1.The CuK alpha radiation (8.5 kV) produced the Hohannson monochromator was replaced by higher energy AgK alpha radiation (22.2 kV). The total spectrum was improved by using a palladium filter and an impulse height discriminator. 2. A slit collimator was used giving a beam area of 3 mm X 0.5 mm with improved paralleism ofthe beam and an incident angle alpha of 0.1 degrees compared with a previous angle of alpha approximately 1 degrees. 3. Correction of attenuation N = No. e-ux by a correction factor B to allow for "build-up factor" in the required area of measurement is no longer necessary. Measurements at four of hydroxyle apatite (Reiss) provide the required mineral absorption. 4.AgK alpha radiation permits measurement of thicker bones such as radius and calcaneus and provides adequate impulses for short periods of measurement which is useful in practice.
1973年，格布哈特、海嫩和茨维克描述的测量矿物质当量的仪器经过了理论和实验研究；结果，对其进行了改进，显著改善了指骨精确吸收测量的基础。1. 由约翰松单色仪产生的CuKα辐射（8.5 kV）被更高能量的AgKα辐射（22.2 kV）所取代。通过使用钯滤光片和脉冲高度鉴别器，整体光谱得到了改善。2. 使用了狭缝准直器，其光束面积为3毫米×0.5毫米，光束平行度得到改善，入射角α为0.1度，而之前的入射角α约为1度。3. 不再需要通过校正因子B对衰减N = No. e-ux进行校正，以考虑所需测量区域的“积累因子”。对四种羟基磷灰石（赖斯）的测量提供了所需的矿物质吸收情况。4. AgKα辐射允许对较厚的骨骼（如桡骨和跟骨）进行测量，并在短时间测量内提供足够的脉冲，这在实际应用中很有用。
