Biomedical subjects

L Lichtenau

Publications and source records attributed to L Lichtenau.

4 recordsLinked to original sources

PubMed1980

[Investigations of the mineral topography in human vertebral bodies. A comparison of results derived from bone-ashing, photodensitometry and attenuation coefficients by CT (author's transl)].

A method for the in vivo investigation of the mineral distribution in human vertebral bodies by the aid of computed tomography is presented. The attenuation coefficients resulting from transversal tomograms of vertebral spongiosa are compared with the results of bone ashing from in vitro investigations. Computed tomography values, ash weights and photodensitometric values show a high degree of correlation.

Densitometry↗

PubMed1976

[Radiodensitometric studies on bone structure following tooth extractions].

Radiographs of the human mandible, accurately showing the same location, are made at different times after extraction of lateral teeth and examined with regard to changes in the bone structure during wound healing. The radiograms are evaluated by densography and the photometric graphs thus obtained are evaluated by computer. Compared with histological findings known so far, these examinations furnish information on time and location of resorption and production of bone after dental extractions. The first findings are quantitatively presented.

Bone Regeneration↗

PubMed1975

[Production of radiographs of human mandible method and proof of accuracy of the reproducibility of the region].

In continuation of studies by Adolf, Lichtenau, and Epple (1975), the method for preparing congruent radiograms was technically improved. By photometric probing of the radiogram, the reproducibility of a given spot is demonstrated by means of data processing. The results show that in radiograms taken at different times the same spot can be identified.

Humans↗

PubMed1975

[Reproducible and congruent radiographs for the study of bone structure].

Radiograms that are reproducible and are as identical as possible are an absolute prerequisite for objective early diagnosis of the smallest changes in the bone structure. Changes that are no longer visible to the naked eye, are recorded by photometry and can be represented objectively by computerized evaluation. It is the object of this study to develop a method for taking roentgenograms with films generally used in the dental office, which allows to always the area always to be radiographed reproducibly. The x-ray machine is described and tested on four patients. The radiograms are photometrically scanned and entered into a computer in order to check the location of the radiograph. The results show that with our method it is possible to take identical radiograms at different times.

Bone Development↗