background: the radiation doses resulting from diagnostic x-ray examinations are routinely measured in terms of entrance surface dose (esd) and effective dose (ed). in this study, for the purpose of radiation protection, the radiation doses received from digital chest x-ray examination were evaluated in terms of esd and ed. material and methods: the ed was calculated by using the mcnp monte car...

BACKGROUND Occult pneumothorax represents a diagnostic pitfall during the primary survey of trauma patients, particularly if these patients require early positive pressure ventilation. This study investigated the accuracy of our proposed rapid model of ultrasound transducer positioning during the primary survey of trauma patients after their arrival at the hospital. METHODS This diagnostic tr...

OBJECTIVE To compare the use of bedside ultrasound and chest radiography to verify central venous catheter tip positioning. DESIGN Prospective observational study. SETTING PICU of a university hospital. PATIENTS Patients aged 0-14 who required a central venous catheter. INTERVENTION None. MEASUREMENTS AND MAIN RESULTS Central venous catheter tip location was confirmed by ultrasound an...

Objectives-To examine whether or not workers with pre-existing mild pulmonary fibrosis have accelerated decline in forced expiratory volume in one second (FEV1) or forced vital capacity (FVC), under low level exposure to chrysotile asbestos. Methods-All male workers in two asbestos manufacturing factories were followed up annually for six years to compare their declines in FEV1 and FVC. The val...

The chest exam is performed more frequently than any other exam in the imaging department. It is important for radiographers to understand the standards for imaging the chest because good chest radiographs are critical in managing patient care. This article provides an overview of chest radiography from the perspective of both the radiologist and the technologist. Readers will gain an understan...

Traditionally in the United States, large size chest x-ray film examinations are made with 14 x 17 inch ifims in 15 x 18 inch cassettes. When a survey minifilm reveals a questionable disease process, large films are ordered for further study. This film has become the accepted size through years of routine practice. Its use is habitual and specified in practically all hospitals, clinics and doct...

Fundamental and clinical evaluation of chest CT imaging in detectability of pulmonary nodules was carried out in comparison with projection chest radiography including conventional screen-film system, advanced multiple beam equalization radiography (AMBER System), and computed radiography with imaging plate (CR). Detectability of simulated nodules in the fundamental study and of metastatic pulm...

Lung cancer is currently the primary cause of cancer death, and its incidence continues to increase worldwide. Because of its high sensitivity, normal-dose helical computed tomography (CT) is currently considered the gold standard for lung cancer detection. Previous studies have shown that low-dose helical CT can detect early-stage lung cancer, thereby decreasing morbidity (Yankelevitz et al., ...

OBJECTIVE To determine the need for routine chest radiography following percutaneous dilational tracheotomy (PDT). DESIGN Retrospective chart review. SETTING Tertiary care academic medical center. PATIENTS The records of 119 patients undergoing PDT between 1993 and 2000 for indications of prolonged intubation or need for pulmonary toilet. All patients received a portable chest radiograph ...

BACKGROUND The aim of this study was to evaluate the usefulness of noise reduction procedure (NRP), a function in the new image processing for chest radiography. METHODS A CXDI-50G Portable Digital Radiography System (Canon) was used for X-ray detection. Image noise was analyzed with a noise power spectrum (NPS) and a burger phantom was used for evaluation of density resolution. The usefulnes...