R F Bury

Publications (11)27.06 Total impact

• Article: Initial clinical experience with [123I]ioflupane scintigraphy in movement disorders.

  P Manoharan, S Jamieson, R F Bury
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  ABSTRACT: The objective of this study was to determine whether dopamine transporter (DAT) scintigraphy influences the management of movement disorders in clinically indeterminate cases. Seventeen patients (ten women, seven men; age range 44-84 years) with a presumptive diagnosis of Parkinson's disease (PD) were referred for single-photon emission computed tomography (SPECT) scintigraphy using [(123)I]ioflupane between November 2002 and August 2003. The scintigraphic results, clinical diagnosis, and management intentions pre- and post-examination were recorded. Of the 17 patients who underwent scintigraphy, two patients on neuroleptic medication exhibited features of PD; one had an abnormal scintigraphic examination that confirmed PD, the other had a negative examination, confirming drug-induced parkinsonism, and these were managed accordingly. Of the other cases, the results of 10 examinations were compatible with PD. Five were reported as being normal, the final diagnoses in this group included: cerebrovascular disease (CVD); early Alzheimer's; provisional clinical diagnosis of generalized movement disorder; and possible Wilson's disease. One patient was felt to have a parkinsonian syndrome despite the normal result (this patient had a positive apomorphine test). This series illustrates the value of DAT scintigraphy in the management of clinically indeterminate movement disorders at a tertiary referral centre arguing for its use in the initial diagnostic process. However, it is clear that the use of DAT scintigraphy poses significant resource implications. Further evidence should clarify the exact role of DAT scintigraphy in clinically indeterminate cases.
  Clinical Radiology 05/2007; 62(5):463-71. · 1.95 Impact Factor
• Article: Commentary on: Does reporting of plain chest radiographs affect the immediate management of patients admitted to a medical assessment unit?

  R F Bury
  Clinical Radiology 10/2003; 58(9):717-8. · 1.95 Impact Factor
• Article: Radiation hazards in urological practice.

  R F Bury
  BJU International 05/2002; 89(6):505-9. · 2.84 Impact Factor
• Article: Threshold contrast detail detectability measurement of the fluoroscopic image quality of a dynamic solid-state digital x-ray image detector.

  A G Davies, A R Cowen, S M Kengyelics, R F Bury, T J Bruijns
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  ABSTRACT: Solid-state digital x-ray imaging detectors of flat-panel construction will play an increasingly important role in future medical imaging facilities. Solid-state detectors that will support both dynamic (including fluoroscopic) and radiographic image recording are under active development. The image quality of an experimental solid-state digital x-ray image detector operating in a continuous fluoroscopy mode has been investigated. The threshold contrast detail detectability (TCDD) technique was used to compare the fluoroscopic imaging performance of an experimental dynamic solid-state digital x-ray image detector with that of a reference image intensifier television (IITV) fluoroscopy system. The reference system incorporated Plumbicon TV. Results were presented as a threshold detection index, or H(T)(A), curves. Measurements were made over a range of mean entrance air kerma (EAK) rates typically used in conventional IITV fluoroscopy. At the upper and mid EAK rate range (440 and 220 nGy/s) the solid-state detector outperformed the reference IITV fluoroscopy system as measured by TCDD performance. At the lowest measured EAK rate (104 nGy/s), the solid-state detector produces slightly inferior TCDD performance compared with the reference system. Although not statistically significant at this EAK rate, the difference will increase as EAK is lowered further. Overall the TCDD results and early clinical experiences support the proposition that a current design of dynamic solid-state detector produces image quality competitive with that of modern IITV fluoroscopy systems. These findings encourage the development of compact and versatile universal x-ray imaging systems based upon solid-state detector technology to support R & F and vascular/interventional applications.
  Medical Physics 02/2001; 28(1):11-5. · 2.83 Impact Factor
• Article: Towards image quality, beam energy and effective dose optimisation in digital thoracic radiography.

  J H Launders, A R Cowen, R F Bury, P Hawkridge
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  ABSTRACT: This paper outlines how objective measurements of both image quality, in terms of signal-to-noise ratio, and effective dose may be used as tools to find the optimum kVp range for a digital chest radiography system. Measurements were made with Thoravision, an amorphous selenium-based digital chest X-ray system. The entrance surface dose and the effective dose to an anthropomorphic chest phantom were determined demonstrating how effective dose is related to beam quality. The image quality was measured using detective quantum efficiency, threshold contrast and a radiologist preference trial involving 100 patients. The results show that, despite the fact that the entrance surface dose decreases as the kVp increases, the effective dose, a better measure of the risk, reaches a minimum value between 90 and 110 kVp; however, the image quality decreases as the kVp increases. In this study the optimum kVp for chest radiography, using a selenium-based radiography system, is in the range 90-110 kVp. This is contrary to the 120- to 150-kVp range that is commonly used. Also, this study shows how objective measurements can be used to optimise radiographic technique without prolonged patient trials.
  European Radiology 02/2001; 11(5):870-5. · 3.22 Impact Factor
• Article: Initial technical and clinical evaluation of a new universal image receptor system.

  R F Bury, A R Cowen, A G Davies, P Hawkridge, A J Bruijns, E von Reth
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  ABSTRACT: The aim of this study was to evaluate the physical performance of an experimental flat-panel digital X-ray detector plate (FDXD), and to assess its clinical potential in radiographic and fluoroscopic mode. The efficiency of the detector was assessed by calculating the low-frequency detective quantum efficiency (DQE(0)), and a measure of image quality was obtained using a threshold contrast detail detectability (TCDD) test object. A range of clinical examinations were also carried out, and the results reviewed by members of the radiology staff. The DQE(0) of the system was calculated to be almost 75%, compared with a value of approximately 20 % for modern computed radiography equipment, offering the potential for increased image quality or significant dose reduction. Measurements using the TCDD test object demonstrated a corresponding advantage for the FDXD in image quality and dose efficiency. Clinical studies are producing radiographic results which are at least the equal of the best currently available digital technology, and a limited number of examinations using fluoroscopic mode at 25 frames per second have been equally encouraging. Equipment using FDXD technology could potentially fulfill all the radiographic and fluoroscopic requirements of the digital department, with improved image quality and dose efficiency.
  European Radiology 02/2000; 10(12):1983-7. · 3.22 Impact Factor
• Article: Technical report: Initial experiences with an experimental solid-state universal digital X-ray image detector.

  R F Bury, A R Cowen, A G Davies, E L Baker, P Hawkridge, A J Bruijns, H Reitsma
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  ABSTRACT: 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.
  Clinical Radiology 01/1999; 53(12):923-8. · 1.95 Impact Factor
• Article: Imaging the thyroid.

  K S Naik, R F Bury
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  ABSTRACT: 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.
  Clinical Radiology 10/1998; 53(9):630-9. · 1.95 Impact Factor
• Article: Reporting requirements for skeletal digital radiography: comparison of soft-copy and hard-copy presentation.

  P J O'Connor, A G Davies, R C Fowler, D J Lintott, R F Bury, G J Parkin, D Martinez, A Saifuddin, A R Cowen
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  ABSTRACT: To assess diagnostic performance and reader preference when reporting results from digital hard-copy and two soft-copy formats of skeletal digital radiography. 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. 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). 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.
  Radiology 04/1998; 207(1):249-54. · 5.73 Impact Factor
• Conference Proceeding: Progress with an “all-wavelet” approach to image enhancement and de-noising of direct digital thorax radiographic images

  J.-P. Bolet, A.R. Cowen, J. Launders, J. Davies, G.J.S. Parkin, R.F. Bury
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  ABSTRACT: This paper describes the current status of our program of work in the area of digital image enhancement using wavelet-based multi-scale processing. We are developing an all-wavelet image processing algorithm to enhance the quality of direct digital thorax images, by the manipulation of the data within scale-specific sub-bands. This method avoids the presentation compromises which may result from the global application of unsharp mask based image enhancement methods which are commonly used in medical imaging. This is achieved by applying specific processing to image components according to their scale. In particular contrast enhancement, de-noising and sharpening stages are all tailored to the noise and feature characteristics of Thoravision digital chest X-ray images. Whilst our experiments to date convince us that processing digital X-ray images within the wavelet domain is a useful tool for improving diagnostic image quality, our concerns now focus on the subtlety of this processing, since it can be prone to artefact generation if applied incorrectly. We are also interested in optimising the way in which wavelet based image enhancement must be presented to our clinical colleagues to meet their diagnostic needs
  Image Processing and Its Applications, 1997., Sixth International Conference on; 08/1997
• Article: Out-of-hours scintigraphy: a survey of current practice.

  R F Bury, A H Smith
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  ABSTRACT: 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.
  Nuclear Medicine Communications 03/1993; 14(2):126-9. · 1.40 Impact Factor