Osteotomy as an adjunct to rapid maxillary expansion.
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Biomedical subjects
Publications and source records attributed to W B James.
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A comparison made between five techniques for introducing additional gas to the stomach for double contrast barium examination showed effervescent tablets to be associated with significant improvement in gastric mucosal coating with significantly less bubble formation. A proprietary effervescent health salt on the other hand was associated with significantly greater bubble formation.
A physicist working full-time within a department of diagnostic radiology has found himself concerned with the development of investigative techniques using non-X-ray apparatus, such as thermography, as well as with testing and assessing new X-ray techniques, such as xerography. The scientific training of the physicist enables him to advise and instruct on other research projects. His links with physicists elsewhere are advantageous because of the larger range of specific expertise and available technology. It is thought that the arrangement is successful, should continue, and be tried elsewhere.
Skin temperature distributions are described which correspond to different levels of arterial obstruction in the lower limbs. These temperature distributions are conveniently observed using thermography. Thermography may be used to measure the change in skin temperature when the limb performs work. These skin temperature changes have been correlated with the impairment of blood flow to the lower limb.
To date television has not been used very much in teaching diagnostic radiology. The authors describe their method of producing educational videotape recordings suitable for teaching purposes. The adults point out that the procedure is relatively cheap in a department that possesses a videotape recorder and emphasise its value for specialised radiological teaching.
The operation of a small computer system involved in day to day management in an X-ray department is described. The system consists of the following equipment: PDP 8/F central processor with 8K core storage, 32K magnetic disc storage, High-speed paper tape reader (300 characters/s) and punch (50 characters/s), 3 Olivetti TE318 terminals with sprocket feed, paper tape reader and punch (10 characters/s). The system stores patient data relating to name, address, age, ward, referring physician, examination(s) requested, date of request, date of examination, date of report. From this data a large volume of relevant statistics is made available to the department and to the health authority. Labels for identifying record card, film envelope and X-ray films are automatically typed. During reporting coded phrases can be used by the radiologist. Interesting films can be recorded and recalled for library or consultation purposes as can research items. At report typing stage, the report heading is automatically recalled from the computer store. Coded phrases are typed automatically as is the radiologist's name and the date of the report. A 'DAYBOOK' IS TYPED AUTOMatically at the end of each working day. Problems encountered in running the system and future developments are described.
This paper presents the results of a blind reading trial of thermographic detection of breast cancer. Thermograms from women with no known breast disease, those with benign disease and those with carcinoma have been analysed using a previously described method for examination and assessment. Each record was read blind by three observers and the resulting scores compared for the three groups of women. It was found that, using the scoring system devised, 69 per cent of carcinomas gave scores in the range considered to indicate a high risk of breast disease but that 33 per cent of the scores for the normals also fell into this range. No differentiation between benign and malignant groups could be achieved. A significant number of the carcinomas were also found to show few detectable signs on thermography, resulting in an appreciable false negative rate.
The Trimax system offers film/screen combinations which reduce the X-ray exposure by factors of about 4. This is achieved without deterioration in image quality.
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Methods of comparing mammograms produced by radiation derived from tungsten and molydenum anodes are described. In film mammography better images were obtained using molybdenum radiation. In xeromammography images of equal quality were produced by either technique. However, the dose required for good xeromammography using a molybdenum source was significantly higher than for tungsten.
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