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Biomedical subjects

M Wolf

Publications and source records attributed to M Wolf.

At least 541 records · Page 30Linked to original sources
PubMed1977

[Puncture and marking methods in the diagnosis of breast tumors].

The indication, problems and performance of puncture and marking methods in breast tumors are discussed and a new relief procedure for breast tumor diagnosis, involving peritumoral X-ray contrast medium injection, is described. Only normal X-ray equipment is required for this method.

Breast Diseases↗
PubMed1977

Evaluation of image quality in tomographic imaging.

Modulation Transfer Functions (MTF) for tomographic imaging with linear, circular, hypocycloidal and spiral motion are given. They may be determined experimentally from tomographs of slits or line pair test patterns. In some cases calculation of the MTF from the blur pattern by Fourier transformation is possible. All tomographic MTFS show the same oscillatory behaviour as MTFS of focal spots, resulting in spurious structures and contours in the tomogram. A quantity named signal/spurios signal ratio (SSR) is introduced as a figure of merit. Effective exposure angles are determined from the MTF and compared with the commmonly used 'geometric' exposure angles which result from maximum tube elongations.

Tomography, X-Ray↗
PubMed1977

[Model building in pharmacokinetics/Part II: Generalized theoretical presentation of complete integration of linear compartment models of optional structure (author's transl)].

The method of Laplace transformation is used to obtain the integral of linear differential equations for pharmacokinetic models. A general solution uniform in structure for all types of models (mammillary, catenary, mixed) was established. Choice of one more application compartments, of kinetics describing the input procedure and of elimination pathways is free.

Kinetics↗
PubMed1977

[The effect of sensitized rabbit lymph node cells on the UVT tumor 15264 in inbred mice XVII/Bln].

The effect of rabbit lymphonode cells sensibilized against the UVT-tumor 15264 was studied and compared with equal tests, in which rabbit lymphocytes sensibilized against normal mouse tissue, resp. non-specific immunocompetent rabbit lymphocytes were used. Although a marked toxicity of rabbits lymphocytes against UVT-tumor 15264 could be proved, the authors observed no significantly longer surviving rate. These results do not correspond with the findings of Symes and Ridell from analogous studies on human individuals. Therefore, in cases with advanced stages heterologous passive immunization without clinical support (combined treatment) ought to be rejected.

Animals↗
PubMed1976

Autokinetic movement as a function of symbolic meaning of target shape.

The autokinetic movement responses of 10 American, 10 Chinese, and 10 Iranian students to religious symbols and control stimuli were measured. The hypothesis of differential direction response as a function of the target shapes was supported. Iranian students did show a pattern of responding significantly different from the American and Chinese.

Adolescent↗
PubMed1976

[Frequency, therapy and survival time of reticulum cellsarcoma in the German Democratic Republic. An epidemiological study of 7467 cases from 1960 to 1973 (author's transl)].

7467 Reticulum cell sarcomas have been recorded in the register of patients suffering form carcinoma (1960 to 1973). This report deals with the distribution of age, sex, size and frequency during the different years and in different districts. Moreover, problems of confirming the diagnoses and of histological findings are considered. The chances of survival of patients suffering from reticulum cell sarcoma (about 16,0% survive the five-year limit, 10,3% survive the ten-year-limit) are examined for the therapy, age and size of the tumour also being taken into account.

Adolescent↗