Production and processing of digital ionographic X-ray images

Moores, Brian; Booler, R.; Dovas, T.; Asbury, D. L.

doi:10.1259/0007-1285-57-684-1157

Cited by 6 publications

(1 citation statement)

References 6 publications

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“…Efforts to improve sensitivity by better equipment and more sensitive film-screen combinations are bound to continue; and this has particular importance for those under 50 years of age. Research into methods to facilitate interpretation, for example, by digitalisation of the film image or of the image recording system, is also being pursued (440). So also are improved methods of assessment, which allow a firm diagnosis to be reached quickly.…”

Section: A M M O G R a P H Y A N D S C R E E N I N Gmentioning

confidence: 99%

Breast Cancer: the decision to screen*

Forrest

1991

Journal of Public Health

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LIST OF TABLES IN TEXT 49. Distribution of scores in subgroups before and 3 months after screening 50. Work scheme for screening in Stockholm trial with actual numbers of women involved 51. Comparison of findings in patients referred to the screening clinic (where assessment was) and from hospital outpatient 52. Rates of biopsies (per 1000 women) and benign : malignant ratios reported in screening trials 53. Comparison biopsy rates (per 1000 women) and benign : malignant ratios in USA and Nijmegen over similar periods of screening 54. Predictive value of referral generated by a mammographic biopsy for diagnosis of cancer in Nijmegen programme of screening 55. Relationship age to benign : malignant ratio of biopsies generated by screening in BCDDP 56. Factors influencing risk of developing breast cancer 57. The application of risk factor analyses to selective screening 58. Comparison of costs per quality-adjusted life years gained from various health-care procedures 59. Incidence of contralateral breast cancer in controlled randomised trials of adjuvant therapy for primary breast cancer in which tamoxifen has been given in one arm alone 60. Controlled randomised trials under way in U.K. national breast cancer screening service xxi 153 155

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Section: A M M O G R a P H Y A N D S C R E E N I N Gmentioning

confidence: 99%

Breast Cancer: the decision to screen*

Forrest

1991

Journal of Public Health

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The Design and Performance of a Digital Ionographic Imaging System

Moores¹,

Booler²,

Dovas³

1986

Information Processing in Medical Imaging

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Resolution limits of a low-pressure ionography chamber

Booler

Moores

1985

Phys. Med. Biol.

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The sources of resolution loss are presented for an ionography chamber operated at low gas pressure (1-2 x lo5 Pa). The alignment tolerances imposed by the spherical geometry have been caldulated and are shown to be easily attaintable. Monte Carlo simulations, calculating the blurring effect of photoelectron ranges, have been camed out for several diagnostic x-ray spectra and with Freon 13B1 as the chamber gas. The resulting line spread functions have been Fourier transformed to give the modulation transfer function. It is seen that for all of the x-ray beam quaIities presented in this paper, the limiting resolution is in excess of 2 cycles/mm. Finally, the effect of ante-charge collection upon the resolution is discussed and a technique is proposed whereby this effect may be reduced.

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Production and processing of digital ionographic X-ray images

Cited by 6 publications

References 6 publications

Breast Cancer: the decision to screen*

Breast Cancer: the decision to screen*

The Design and Performance of a Digital Ionographic Imaging System

Resolution limits of a low-pressure ionography chamber

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