─ 179 ─ Screen-film mammography has certain technical limitations which reduce its effectiveness: the film gradient must be balanced against the need for wide latitude, detection of microcalcifications and portrayal of the clarity of the margins of breast masses are reduced due to the presence of film noise in the displayed image, film processing artifacts can degrade the mammographic image, an...

Introduction Mammography is the most technically demanding radiographic modality, requiring high spatial resolution, excellent low contrast discrimination, and wide dynamic range. The development of dedicated mammography systems [1] in the mid-1960s and the refinements in film-screen technology over its long evolution [2,3] were of critical importance in establishing the benefits of mammography...

There are several methods to evaluate objectively the quality of a digital image. For digital mammography, objective quality assessment must be performed without references. In a previous study, the authors investigated the use of a normalized anisotropic quality index (NAQI) to assess mammography images blindly in terms of noise and spatial resolution. Since the NAQI is used as a quality metri...

Digital offers clear logistical advantages, such as the ability to integrate mammography images and reports with the rest of the digital radiology enterprise. And all major trials completed to date have concluded that clinically, digital is at least equivalent to, if not statistically better than, screen-film. With the high spatial resolution so critical for detecting masses and microcalcificat...

A questionnaire survey about mammography in Hokkaido was mailed to 121 facilities from August to September 2009. We surveyed the conditions of digital mammography with regard to quality control (QC) and average glandular dose at 79 facilities in Hokkaido in 2009, and the results of the survey were compared with those of 2004. We found that digital mammography techniques were widely used across ...

Introduction Although breast cancer awareness was raised over the last two decades and breast cancer funding has risen strongly, the United States has one of the highest breast cancer rates in the world. Each year 180,000 women are diagnosed and 44,000 women will die of breast cancer. The even more alarming statistic is that about fifty years ago the probability for a woman to be diagnosed with...

Purpose One of the advantages of digital mammography is the ability to acquire a mammography image with a larger contrast range. With this advantage comes the tradeoff of how to display this larger contrast range. Laser printed film, and video display both have smaller dynamic ranges than standard mammography film-screen systems. This work examines performance and preference studies for display...