Summary
An autologous muscle suspension mixed with contrast medium and injected via a catheter into the renal artery produces a partial thrombosis in the renal vessels with subsequent tissue neccosis. When applied to human cases of renal adenocarcinoma this technique produced a reduced vascularity and widespread necrosis of the tumorous kidney with an appreciable reuciton of its size. Troublesome bleeding ceased and tumours became more accessible to surgical removal. In addition, the findings in a limited number of patients with metastasising renal adenocarcinoma suggested that injection therapy followed by nephrectomy may have a fovourable effect on the further course of the discase.
The technique was free from any serious complications and secondary hypertension was not observed.
In a group of patients suspected of harbouring a foreign body in the oesophagus, the diagnostic accuracy of radiographic examination is found to be high. Only 1 of 243 patients examined by radiography presented a false negative result.
The large difference in transmission between the mediastinum and the part of the chest mainly containing lungs causes major problems in chest radiography. A system for advanced multiple beam equalization radiography has been evaluated. Evaluation of image quality has been performed both using standard phantoms and from clinical radiographs. Measurements of radiation dose burden to the patient have been made both in clinical examinations and using an anthropomorphic phantom. The image quality, in areas with low transmission, is substantially increased using the equalization system. In parts of the chest mainly containing lung tissue, conventional systems show an equal or slightly better image quality. The radiation dose burden to the patient is increased by 25 percent using the equalization system, as compared to a low-dose air-gap system. In our opinion, the slight increase in radiation dose burden is well motivated by the high overall quality of the radiographs produced.
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