Evaluation of mammographic viewbox luminance, illuminance, and color

Haus, Arthur G.; Gray, Joel E.; Daly, Timothy R.

doi:10.1118/1.596988

Cited by 17 publications

(4 citation statements)

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“…Viewing conditions are critical for accurate interpretation of subtle contrast differences on mammography films (Haus et al, 1993;Wang and Gray, 1998;Waynant et al, 1998. The 1999 American College of Radiology (ACR) mammography quality control manual suggests standards for viewbox luminance and illumination levels; however, compliance with these recommended standards varies.…”

Section: Luminance and Illuminationmentioning

confidence: 99%

Improving Breast Imaging Quality Standards

Nass¹,

Ball²

2005

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Section: Luminance and Illuminationmentioning

confidence: 99%

Improving Breast Imaging Quality Standards

Nass¹,

Ball²

2005

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“…Digital images consist of small, usually square elements called pixels. Film optical density range is in this case replaced by dynamic or gray scale range, which is usually from 6 bits (2 6 = 64 gray values) to 16 bits (2 16 = 65,536 gray values). Each pixel has a different shade of gray (depth), eg, 00011111 for an 8-bit image.…”

Section: Analog Vs Digital Mammography: Technical Differencesmentioning

confidence: 99%

“…CRT technology is still lacking in terms of resolution (pixel size) and luminance requirements for mammogram interpretation. Consider that a light-box offers on the average approximately 880 ft-L 16 and a CRT, depending on the type, offers 20 to 180 ft-L. 17 Furthermore, the smallest pixel size available on CRTs is in the order of 100 µm (a 200-µm pixel is more common), yielding a resolution at least three times lower than that of the film. Luminance and resolution, however, are only part of the CRT story.…”

Section: Analog Vs Digital Mammography: Technical Differencesmentioning

confidence: 99%

Digital Mammography: from Theory to Practice

Kallergi

1998

Cancer Control

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Components Analog Digital X-ray tube (target) Molybdenum or rhodium Molybdenum or rhodium or tungsten Grid stationary or moving optional Exposure time 2 -3 sec 1 -6 sec Average dose per view less than 3.0 mGy comparable to analog or less Detector type screen-film cassette solid-state device (linear or 2D) Detector size 18 x 24 cm or 24 x 30 cm 18 x 23 cm or 19 x 25 cm Spatial resolution 15 -20 lp/mm (33 -25 µm) 5 -13 lp/mm (100 -40 µm) Image contrast resolution approximately 0.04 comparable to analog or better Dynamic range (latitude) 25 -100 5,000 -10,000 Noise quantum and film granularity quantum and electronic Image development wet processing wet or dry laser printers or digital Image display light box CRT and/or light box Image processing film processing CAD/post-processing Components and Characteristics of Analog and Digital Mammography Systems From Yaffe MJ, 8 Cheung L, 9 and Williams MB. 10

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“…At present, the radiology images of many hospitals stored a lot of precious information on the traditional X-ray film, these information play a very significant role in clinical diagnosis, teaching and scientific research [1]. But some of material have metamorphism with the passage of time, image information has become blurred and can't be used for medical diagnosis, teaching and scientific research.…”

Section: Introductionmentioning

confidence: 99%

Image Enhancement of X-Ray Film Base on Mutil-Scale Retinex

Wang

Wei

2011

Artificial Intelligence and Computational Intelligence

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Abstract. View of film system for medical diagnosis was presented. the system which took the cold cathode fluorescent lamps (CCFL) as the background light source, excluded ambient light impact on the concept of film by a light shell , and realized the digital X-ray film through the CCD camera the image information transferred to the computer. The details of hidden areas on some obscure digital X-ray images were enhanced by multi-scale Retinex (MSR) algorithm. With this method, the image contrast enhancement, sharpening and dynamic range compression was achieved at the same time. The information of hidden areas of X-ray image was obviously enhanced. The enhancement technique was compared with other techniques such as histogram equalization, homomorphism filter. The result of experiment shows that the MSR algorithm can overcome the lack of enhancement of traditional digital X-ray method and satisfy the clinic demand.

show abstract

Evaluation of mammographic viewbox luminance, illuminance, and color

Cited by 17 publications

References 0 publications

Improving Breast Imaging Quality Standards

Improving Breast Imaging Quality Standards

Digital Mammography: from Theory to Practice

Image Enhancement of X-Ray Film Base on Mutil-Scale Retinex

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