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In patients with severe craniocerebral trauma, who need a continuous positive-pressure breathing, the detection of pulmonary and mediastinal traumatic lesions, especially pneumothorax, may alter the management. The aim of this study is to evaluate the efficiency and accuracy of conventional supine chest roentgenograms to detect the associated traumatic(More)
The knowledge of the relationship that links radiation dose and image quality is a prerequisite to any optimization of medical diagnostic radiology. Image quality depends, on the one hand, on the physical parameters such as contrast, resolution, and noise, and on the other hand, on characteristics of the observer that assesses the image. While the role of(More)
Of 10,000 mammographies done over a 9-year period, 16 cases of hamartoma of the breast were diagnosed. The entity is a well delimited mass composed of dysplastic-appearing mammary tissue admixed to fat. It can be readily recognized and should not be confused with fibroadenoma or mammary dysplasia. The accuracy with which it can be diagnosed by mammography(More)
A mode-locked titanium-sapphire laser with 15 fs pulse width is used to determine the temporal profile of the ultrashort electron bunches in the linear TESLA Test accelerator. The experimental setup is described and first results are presented on the synchronization of the Ti:Sa laser with the radio frequency of the supercon-ducting accelerator and on the(More)
The fronto-ethmoidal osteoma is a relatively rare radiological finding and its growth potential, as well as the complications it may lead to, are often underestimated. Osteomas are a frequent cause of mucoceles and sinusitis due to blockage of the nasal ducts but can also present with more dramatic signs such as orbital or intracranial invasion. This(More)
The ability of systemic immunization to induce protection against Helicobacter pylori infection has been evaluated in a mouse model. It was observed that if appropriate formulations and adjuvants were used such immunization elicited in outbred Swiss mice levels of protection similar or better than those induced by the oral route in the presence of cholera(More)
The influence of anode and filter materials on the performance (image quality and dose) of a mammography system is investigated. The image quality is evaluated with the image quality index method. A computer simulation has been developed to calculate the physical parameters of the image quality index (contrast, resolution and noise) as well as the mean(More)
The mammograms and histologic slides of 58 cases of atypical hyperplasia (AH) of the breast were retrospectively reviewed to determine the geographic correlation (direct, near, or remote) between mammographic abnormalities (if present) and the histologic findings. A direct mammographic-histologic correlation was found in 24 of the 58 cases (41%), near(More)