T hymoma is a tumor in which detection is a challenge to both the internist and radiologist. Because of its location in the anterior part of the mediastinum, it is sometimes difficult to distinguish radiologically from an aortic aneurysm,14 a prominent left pulmonary artery,13 an enlarged right atrium,”3 enlarged hilar lymph glands, or a pericardial effusion.4 We have lately observed apparently...

This study involved the examination of 1,006 chest x-ray films of workers from the industries devoted to shipyard welding, stone grinding, and refractory crushing in southern Okayama prefecture. Of the reviewed films, analysis was focused on subjects with a profusion rate of 0/1 as well as pneumoconiotic subjects (exhibiting profusion rates of 1/0 or greater) in order to discover cases in the b...

Aneurysms of the ascending aorta usually present to the right of the spine. Four patients with aneurysms of the ascending aorta or transverse arch presented to the left of the spine on the posteroanterior chest roentgenogram. On the lateral chest x-ray film, these were associated with the ascending aorta, and the apparent discrepancy led to diagnostic difficulty. All cases were proven by aortog...

(1) non-irritating to the lungs and productive of no general reaction, (2) miscible with bronchial secretions, (3) quickly and easily eliminated from the lungs, (4) capable of filling or outlining even the smaller bronchi without filling the alveoli, (5) capable of maintaining the filling until x-ray films can be exposed, (6) capable of giving good contrast roentgenogram, (‘7) easy to administe...

Frontal plane ballistocardiograms obtained from 10 normal subjects were analyzed and compared with abnormal records obtained from patients with known cardiovascular disease. The normal vector loop is described, and the importance of the transverse ballistocardiogram is discussed. It is suggested that the orientation of the J loop may be related to the anatomic position of the heart. No such rel...

X-ray magnetic circular dichroism spectroscopy using an X-ray free electron laser is demonstrated with spectra over the Fe L(3,2)-edges. The high brightness of the X-ray free electron laser combined with high accuracy detection of incident and transmitted X-rays enables ultrafast X-ray magnetic circular dichroism studies of unprecedented sensitivity. This new capability is applied to a study of...

The objective of the present study was to clinically evaluate the sensitivity and dynamic range of three digital systems (Sens-A-Ray, CDR, Digora), digitized film and E-speed film. Five objects were submitted to three different kilovoltages and seven exposure times. In order to evaluate the relationship between exposure time and dosage, measurements were made in a dental x-ray unit with an ion ...

This paper reports the correlation between film thickness, nanostructure and DC electrical properties of copper thin films deposited by PVD method on glass substrate. X-ray diffraction (XRD) and atomic force microscopy (AFM) were used for crystallography and morphology investigation, respectively. Resistivity was measured by four point probe instrument, while a Hall effects measurement system w...

The aim of this study was to investigate and compare the radio-opacity of core materials for all-ceramic restorations, such as zirconia (NANOZR and Y-TZP) and alumina, against commercially pure titanium (cpTi) and aluminum. X-ray images were taken under general settings using an X-ray film. The X-ray film images were scanned using a digital scanner, and the darkness at the central area of each ...