Search PubMed⌕ Search

Biomedical subjects

G Endert

Publications and source records attributed to G Endert.

At least 37 records · Page 2Linked to original sources
PubMed1984

[Application of ROC analysis to evaluating different methods of skeletal scintigraphy. Description of a practicable method].

Various techniques producing similar information can be compared by the use of ROC analysis. A practical and quick method of ROC analysis, which is otherwise very time-consuming, has been described for comparing various types of skeletal scintigraphy. Data is obtained by means of a phantom and evaluated with the help of a scheme which requires only moderate computational facilities.

Bone and Bones↗
PubMed1984

[Exposure technics for computed scintigrams].

The technique of making copies on radiographic films or on multiformat cameras from computer scintigrams, computer tomograms, digital radiographs or other similar digital images should be carefully studied in order to make the best use of the characteristics of the film. Contrast transfer was studied using a nuclear medicine camera computer system with registration on radiographic film. Possible difficulties in obtaining copies and a simple software arrangement are described, which would influence contrast transmission.

Absorptiometry, Photon↗
PubMed1984

[Value of radiological diagnosis in the complex study of femur head necrosis in children. 2. Scintigraphic and arteriographic studies in the framework of the complex diagnosis of femur head necrosis].

101 scintigraphic investigations and 42 angiograms show that the vascular tamponade is the decisive factor for the beginning of necrosis of the femoral head ossification center. Plain films, scintigraphy and angiography give information of the duration of the disease. Extent and localisation of the circulatory disturbance are important for the prognosis of the disease. From stage classification and prognostic factors the conclusions for therapy can be drawn.

Adolescent↗
PubMed1983

[Diagnosis of thrombosis with indium-111 labeled thrombocytes].

The distribution pattern of 111In-labelled autologous platelets was investigated in 50 patients. Imaging was performed with a scintillation camera connected to a computer system. 20 patients suffering from obliterative arterial disease showed a normal platelet distribution. Endothelial lesions after arteriography were found in 6 out of 10 patients. 15 of 20 patients with suspected venous thrombosis showed local platelet deposition. 10 of these patients with local platelet depositions were investigated by phlebography. Positive findings (fresh thrombi) were found in 8 patients. Optimum results were obtained by injecting platelets distal to the venous thrombus. Signs of thrombosis are interruption of blood flow, collateral formation and platelet deposition. This new method offers possibilities of radioisotopic diagnosis of parietal thrombus and venous thrombosis despite anticoagulation or fibrinolysis.

Adolescent↗
PubMed1983

[133Xe-labeling of tissue adhesives for catheter embolization].

A method for radio-nuclide labelling of histo-acryl/lipiodol with 133Xe gas is described. The method consists of dissolving the gas in lipiodol under sterile conditions. After embolization and angiography, the localisation of the embolizing material can be determined by means of a scintillation camera. The labelling method was used in 15 patients. In all patients the position of the embolizing material, as demonstrated by scintigraphy, corresponded with the radiological findings. It was not possible to demonstrate escape of the material by scintigraphy.

Embolization, Therapeutic↗
PubMed1983

[Venography with 111Indium-labelled autologous thrombocytes].

111Indium-labelled thrombocytes were used for radionuclide venography in ten patients. All types of thrombi could be demonstrated with a high degree of accuracy, particularly if the marked thrombocytes were injected distally. In cases of complete occlusion by thrombus, the peripheral end of the clot appeared as a 'hot spot'. Non-occluding thrombi with a thrombogenic surface can be differentiated from lesions of the endothelium. Compared with venography using labelled microspheres, labelled thrombocytes have the advantage of demonstrating the degree of activity of the thrombotic process.

Blood Platelets↗
PubMed1983

[Radiation load of kidneys in telecobalt irradiation of aortic lymph nodes].

The kidneys of 117 patients were examined before and after (immediately until several weeks) a telecobalt irradiation of the aortal lymph nodes. In 36 out of them, another control examination could be performed after 1 1/2 years. In 17 patients, the early examinations showed functional troubles of the kidneys which regressed in nine cases. The late examinations showed in 19 cases functional restrictions which have to be considered to be irreversible. The conclusion must be drawn that it is necessary to examine the kidneys before and until several years after a radiotherapy of the aortal lymph nodes and that the dose distribution has to be optimized with respect to a conservation of the kidneys, as far as this is oncologically possible.

Adult↗
PubMed1981

[Embolization treatment of renal tumors (author's transl)].

Embolization of renal tumors is receiving importance. This method of interventional radiology was modified for our conditions and completed by special nuclear medical diagnostic. 86 embolization procedures were carried out in 80 patients with richly vascularized renal tumours. Nephrectomy was performed in 66 of these cases. Efficacy of our embolization technique was evaluated by nuclear medicine, intraoperative morphological findings and histological results. There were no complications in our series. We have found only in one patient a rejection of isotope labelled embolic material into peripheral arteries without clinical consequence.

Adenocarcinoma↗