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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.
K D Hermanutz, and
M Gebhardt, and
G Meurin
July 1974,
Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin,
K D Hermanutz, and
M Gebhardt, and
G Meurin
December 1979,
Unfallheilkunde,
K D Hermanutz, and
M Gebhardt, and
G Meurin
November 1978,
Rinsho byori. The Japanese journal of clinical pathology,
K D Hermanutz, and
M Gebhardt, and
G Meurin
December 1978,
La Radiologia medica,
K D Hermanutz, and
M Gebhardt, and
G Meurin
January 1976,
Radiologia diagnostica,
K D Hermanutz, and
M Gebhardt, and
G Meurin
September 1979,
Strahlentherapie,
K D Hermanutz, and
M Gebhardt, and
G Meurin
November 1981,
Rontgen-Blatter; Zeitschrift fur Rontgen-Technik und medizinisch-wissenschaftliche Photographie,
K D Hermanutz, and
M Gebhardt, and
G Meurin
September 1976,
Der Radiologe,
K D Hermanutz, and
M Gebhardt, and
G Meurin
June 1979,
Rinsho hoshasen. Clinical radiography,
K D Hermanutz, and
M Gebhardt, and
G Meurin
January 1974,
Archiv fur orthopadische und Unfall-Chirurgie,
