Biomedical subjects
R F Bury
Publications and source records attributed to R F Bury.
Technical report: Initial experiences with an experimental solid-state universal digital X-ray image detector.
This paper presents a brief technical evaluation and first review of clinical experiences with an experimental direct digital X-ray image detector designed to support both dynamic and snap-shot imaging. Derivatives of this type of image detector can potentially fulfil the majority of the fluoroscopic and radiographic imaging requirements of clinical radiology departments, and initial results suggest that imaging systems using the new technology will provide a high quality dose-efficient solution to the search for a universal digital X-ray image detector.
Imaging the thyroid.
Thyroid imaging has historically relied heavily on scintigraphy, although, not surprisingly in view of the superficial position of the gland, ultrasound has assumed an increasingly prominent role in recent years. The other cross-sectional imaging modalities can also be useful, and the emergence of new radiopharmaceuticals and the increasingly central role of fine needle aspiration cytology have further added to the range of diagnostic techniques available. This review attempts to summarize the current state of knowledge, and makes some suggestions for the most efficient use of imaging resources in the investigation of thyroid disease.
Reporting requirements for skeletal digital radiography: comparison of soft-copy and hard-copy presentation.
PURPOSE: To assess diagnostic performance and reader preference when reporting results from digital hard-copy and two soft-copy formats of skeletal digital radiography. MATERIALS AND METHODS: The data comprised hand radiographs of patients undergoing renal dialysis. Normal hand radiographs obtained in trauma patients were assessed as control images. One hundred fifteen images acquired with a photostimulable-phosphor computed radiography system were analyzed. Image selection and initial assessment were by consensus of two experienced radiologists, who graded the radiographic changes of hyperparathyroidism with the Ritz scoring system. The images were then presented to four readers in three formats: hard-copy output and soft-copy presentations at 2K2 and 1K2 resolutions. These readers scored pathologic change and image preference. The results were analyzed with the receiver operating characteristic technique. RESULTS: There was a significant improvement in diagnostic performance for both soft-copy formats relative to the hard-copy format (P < .001). No significant difference in diagnostic performance was found between the two soft-copy formats. There was a significant preference for both soft-copy formats relative to the hard-copy format (P < .01), with the 2K2 soft-copy images preferred to the 1K2 images (P < .01). CONCLUSION: Soft-copy reporting can provide superior diagnostic performance even for images viewed at a modest (1K2) resolution. The lack of difference between the two soft-copy formats has important economic implications with respect to departmental hardware requirements.
Intranasal calcitonin therapy in Sudeck's atrophy.
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Question of the month--September 1993. 133Xe and lung ventilation imaging.
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Out-of-hours scintigraphy: a survey of current practice.
A questionnaire was sent to 221 nuclear medicine departments in the UK asking about their staffing and work patterns. In particular, we wanted to know how many of them offered an on-call service. In those cases where departments wished to offer this service but did not do so, they were asked what was stopping them. Replies were received from 150 departments, a response rate of 68%. Of these, 43 (29%) offered an on-call service, although only 21 (14%) performed ten or more out-of-hours scans in an average year. The examinations most commonly offered were lung scans, localization of gastrointestinal bleeding and renography. In those centres wishing to offer an on-call service but which were unable to do so, limitation of resources was the reason most frequently advanced. Lack of clinical demand was the factor most often quoted by those not wishing to extend their service. The issue of emergency scintigraphy is discussed in the light of these results.
General practice radiology--the poor relation.
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Bone scintigraphy in the evaluation of ejection injuries.
The Royal Air Force (RAF) experience on local back injury with all ejection seats is that 50% have vertebral fractures on radiographic examination, with or without symptoms. These aviators are placed under the care of an orthopedic specialist and restricted from flying duties for 3 months or more. About half of the remainder demonstrate positive bone scans. Until recently, RAF policy was to treat these individuals the same as those with radiographically defined fractures. The author recommends this group of pilots be examined by orthopedic surgeons, and reviewed annually to assess long-term sequelae. Meanwhile, if asymptomatic, they are allowed to return to flying duties. The RAF recently incorporated most of these recommendations into a policy change.
Emphysematous gastritis after acute pancreatitis.
A case of emphysematous gastritis associated with extensive gastric infarction after acute pancreatitis and acute renal failure is described. This complication was diagnosed on a plain abdominal radiograph and confirmed endoscopically. Extensive gastric and hepatic infarction was seen at necropsy.
General practitioners' knowledge about radiology.
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