Forum für Wissenschaft, Industrie und Wirtschaft

Hauptsponsoren:     3M 
Datenbankrecherche:

 

Digital mammography does not improve breast cancer detection rates

13.06.2005


Digital mammography provides no clear-cut improvements over traditional film X-rays in the ability to detect cases of breast cancer, says a new technology assessment report. The technology does, however, offer other benefits, including slightly lower radiation doses for patients, that may prompt its increasing use despite its much higher costs.



Known as "full-field digital mammography," the high-tech equipment records images of the breast electronically instead of on X-ray film. The pictures are stored directly in a computer system, where they can be enhanced, magnified or shared. The digital devices were first approved for marketing in the United States in 2000.

... mehr zu:
»Digital »ECRI »Group »X-ray


Three large trials of the technology have been completed, with several thousand women receiving digital mammograms in each. No statistically significant differences in detection rates were observed between the x-ray and the new digital technology. The patients in each group experienced identical positioning and compression of the breast.

"The studies that have been done so far haven’t provided a ’slam-dunk’ for full-field digital mammography," says Robert Maliff, associate director of the Health Systems Group at ECRI, whose Technology Assessment Group published the report. ECRI is a nonprofit health services research agency that produces systematic evidence reviews on medical devices, drugs, biotechnologies, procedures, and behavioral health services.

Maliff says radiation for patients may be "incrementally lower" with digital screening depending on the type of detector used, but the report did not assess the literature on radiation doses -- rather it assessed its efficacy as a screening technology for breast cancer.

A new large clinical trial sponsored by the National Cancer Institute has recently been completed, and published results are expected soon. Nearly 50,000 women in the United States and Canada received both types of mammograms and were asked to return one year later for follow-up exams to determine whether digital mammography detects breast cancer more accurately than X-rays.

At best, the new technology is expected to offer incremental improvements in cancer detection rates, which Maliff says may be enough to spark a large-scale transition to the new technology.

"Cost-effectiveness will ultimately determine whether full-field digital mammography technology is adopted, since hospitals must justify their purchase based on exam volume and patient population," the report says.

Digital mammography systems cost at least three times as much as film systems. In addition to reducing radiation, they can also facilitate the use of computer-aided detection systems and can be easily transmitted for second opinions, according to the report. The technology lends itself to operational improvements. Without films to process, handle, and store, radiology workflow becomes more efficient, says Maliff.

"Many health care professionals predict that screen-film mammography will eventually be replaced by full-field digital mammography once it is proven that the image quality and diagnostic accuracy of both technologies are at least equivalent," says the ECRI report.

According to ECRI, the current body of evidence that suggests that digital mammography may be able to reduce recall rates, and possibly necessary follow-up procedures, which could offset some of its higher initial costs. But more evidence is needed to confirm these potential benefits.

Maliff predicts some facilities may "take the leap" to digital mammography for marketing reasons to position themselves as offering the best women’s care services.

Breast cancer is the most common malignancy in women and the third most frequent cancer throughout the world. More than 1 million new cases were diagnosed worldwide in 2002, and incidence rates are increasing at about 5 percent a year.

Laurie Menyo | EurekAlert!
Weitere Informationen:
http://www.cfah.org/
http://www.hbns.org
http://www.ecri.org

Weitere Berichte zu: Digital ECRI Group X-ray

Weitere Nachrichten aus der Kategorie Studien Analysen:

nachricht Welche Auswirkungen hat die Digitalisierung der Industrieproduktion auf Jobs und Umweltschutz?
16.05.2017 | Institute for Advanced Sustainability Studies e.V.

nachricht Klimawandel: ungeahnte Rolle der Bodenerosion
11.04.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

Alle Nachrichten aus der Kategorie: Studien Analysen >>>

Die aktuellsten Pressemeldungen zum Suchbegriff Innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Tumult im trägen Elektronen-Dasein

Ein internationales Team von Physikern hat erstmals das Streuverhalten von Elektronen in einem nichtleitenden Material direkt beobachtet. Ihre Erkenntnisse könnten der Strahlungsmedizin zu Gute kommen.

Elektronen in nichtleitenden Materialien könnte man Trägheit nachsagen. In der Regel bleiben sie an ihren Plätzen, tief im Inneren eines solchen Atomverbunds....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Hauchdünne magnetische Materialien für zukünftige Quantentechnologien entwickelt

Zweidimensionale magnetische Strukturen gelten als vielversprechendes Material für neuartige Datenspeicher, da sich die magnetischen Eigenschaften einzelner Molekülen untersuchen und verändern lassen. Forscher haben nun erstmals einen hauchdünnen Ferrimagneten hergestellt, bei dem sich Moleküle mit verschiedenen magnetischen Zentren auf einer Goldfläche selbst zu einem Schachbrettmuster anordnen. Dies berichten Wissenschaftler des Swiss Nanoscience Institutes der Universität Basel und des Paul Scherrer Institutes in der Wissenschaftszeitschrift «Nature Communications».

Ferrimagneten besitzen zwei magnetische Zentren, deren Magnetismus verschieden stark ist und in entgegengesetzte Richtungen zeigt. Zweidimensionale, quasi...

Im Focus: Neuer Ionisationsweg in molekularem Wasserstoff identifiziert

„Wackelndes“ Molekül schüttelt Elektron ab

Wie reagiert molekularer Wasserstoff auf Beschuss mit intensiven ultrakurzen Laserpulsen? Forscher am Heidelberger MPI für Kernphysik haben neben bekannten...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Alle Focus-News des Innovations-reports >>>

Anzeige

Anzeige

IHR
JOB & KARRIERE
SERVICE
im innovations-report
in Kooperation mit academics
Veranstaltungen

Diabetes Kongress 2017:„Closed Loop“-Systeme als künstliche Bauchspeicheldrüse ab 2018 Realität

23.05.2017 | Veranstaltungen

Aachener Werkzeugmaschinen-Kolloquium 2017: Internet of Production für agile Unternehmen

23.05.2017 | Veranstaltungen

14. Dortmunder MST-Konferenz zeigt individualisierte Gesundheitslösungen mit Mikro- und Nanotechnik

22.05.2017 | Veranstaltungen

 
VideoLinks
B2B-VideoLinks
Weitere VideoLinks >>>
Aktuelle Beiträge

Medikamente aus der CLOUD: Neuer Standard für die Suche nach Wirkstoffkombinationen

23.05.2017 | Biowissenschaften Chemie

Diabetes Kongress 2017:„Closed Loop“-Systeme als künstliche Bauchspeicheldrüse ab 2018 Realität

23.05.2017 | Veranstaltungsnachrichten

CAST-Projekt setzt Dunkler Materie neue Grenzen

23.05.2017 | Physik Astronomie