Radiographic investigation

In radiographic investigations the image of an object is distorted if the X-rays strike the photographic plate at an oblique angle. In order to calibrate the distortion a spherical ball is investigated. The image is an ellipse with centre (p j 2) and further parameters P3 p and P5 as described by the equation... 

Ardran, G.M., The pulmonary effects of toxic gases and smokes, an experimental radiographic investigation, Br. J. Radiol., 23, 107-115, 1950. 

Finnbogason T, Karlsson G, Lindberg L, Mortensson W (1995) Nondisplaced and minimally displaced fractures of the lateral humeral condyle in children a prospective radiographic investigation of fracture stability. J Pediatr Orthop 15 422-425... 

Has the patient recently been subjected to any medical or dental procedures such as major or minor surgery, radiographic investigation, immunization, or tooth filling or extraction ... 

The paper presents the results from systematic comparisons of contrast and resolution obtained with different types of radiation sources on steel thicknesses from 5 to 40 mm. These results have been taken into account with the definitions of the European standard for radiographic inspection of weldments (EN 1435) that is approved since 1997. Conclusions from practical investigations on pipe line sites, in petrochcemical plants and in nuclear power stations will be discussed as well. Furthermore, the presentation will stipulate a variety of advantages obtained from the new source in terras of coUimation and radiation protection. 

The efficiency of gas turbines is limited by the maximum allowable turbine inlet temperature (TIT). The TIT may be increased by cooling of the blades and vanes of the high pressure turbine. Cooling channels can be casted into the components or may be drilled afterwards. Non-conventional processes like EDM, ECD or Laser are used for drilling. Radiographic examination of the drilled components is part of the inspection procedure. Traditional X-Ray film technique has been used. The consumable costs, the waste disposal and the limited capacity of the two film units lead to the decision to investigate the alternative of Real-Time X-Ray. 

The protocol should specify what should be recorded directly into the CRF and what will also be recorded in the medical records. The CRF will contain all the pertinent data associated specifically with the clinical trial but some will be repeated in the medical records, for example, the protocol identification number, date of consent, date of commencement of the study, key baseline medical findings, visit dates, start and finish dates of the study drug/placebo or treatment, concurrent medication, adverse events and key efficacy and any unscheduled or scheduled actions or interventions (such as escape medication). Additional information obtained from biopsy reports, radiographs and similar documents will provide confirmation that the data in the CRF are recorded correctly. Monitors, QA auditors and inspectors need to see all the medical records available to the investigator. It is not appropriate to create copies of data from CRFs or checklists derived from medical records and claim that these are source documents. 

Wegener K, Wesch H. 1979. Pathological changes of lymph nodes in Thorotrast patients patho anatomical auto radiographical and quantitative investigations. Env Res 18 245-255. 

Following WWII, important contributions to the cavity effect were made in addition to the work at CIT and BRL, which continued the flash radiographic studies among other important investigations, by the following laboratories NOL (Naval Ordnance... 

The study of shaped charge and high velocity jets involves investigations in a variety of scientific fields. These include the physics of plasticity of metals at very high strain rates the physics of interactions between metals and HE s and the field of instrumentation design for highly specialized applications. Included are multiple flash radiographic techniques which produce... 

Pendergrass EP, Pryde AW. 1948. Benign pneumoconiosis due to tin oxide A case report with experimental investigation of the radiographic density of the tin oxide dust. J Ind Hyg Tox 30 119-123. 

Investigation of the patients family (Fig. 1-2) revealed the presence of mental retardation in one maternal aunt (II-6, closed circle). She had been bom at term with a birth weight of 3080 g. The pregnancy had been complicated by upper gastrointestinal radiographic exposure in the first trimester. While her motor... 

The radiographic study eliminated the most important arguments used against the authenticity of the horse. However the fact that the horse was proven to be cast with the lost-wax process did not automatically reestablish its authenticity. Careful visual examinations, elemental analyses, studies on corrosion products, metallurgical investigations, and various other technical studies were necessary to demonstrate that all physical characteristics of the bronze were entirely consistent... 

Under normal circumstances, no radiation worker or patient undergoing diagnostic investigation by radiopharmaceutical or radiographic procedures should ever suffer from any acute or long-term injury. Typical radiation doses to patients from radiopharmaceuticals arc similar to. or less than, those from radiographic procedures. 

Investigation of those overexposed to screening smokes should include, at least, chest radiograph, pulmonary function tests, arterial oxygen tension measurement, blood clinical chemistry, sputum culture, ophthalmic examination with slit-lamp biomicroscopy, and possibly measurement of intraocular pressure. If available, CT scan may be used to assess the severity of lung injury (Hsu et al., 2005). With some smokes, notably white phosphorus, there may be skin contamination with severe irritation and penetrating bums the management of white phosphoms skin burns is discussed in detail in Section VI.A.2. 

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