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[Experiences with phantom measurements in different mammographic systems]
R Schulz-Wendtland1, U Aichinger, M Lell
1Institut für Diagnostische Radiologie, Friedrich-Alexander-Universität Erlangen-Nürnberg. Ruediger.Schulz-wendtland@idr.med.uni-erlangen.de
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|October 11, 2002
Summary
Digital mammography and digital phosphor storage plate mammography offer comparable image quality to conventional film-screen systems. These advanced imaging techniques can potentially replace older methods, pending further clinical validation.
Area of Science:
- Radiology
- Medical Imaging
- Diagnostic Imaging
Background:
- Mammography is a crucial tool for breast cancer screening.
- Advancements in imaging technology aim to improve diagnostic accuracy and patient safety.
Purpose of the Study:
- To compare the image quality of conventional film-screen mammography with two digital systems: digital phosphor storage plate mammography and digital mammography.
- To evaluate the diagnostic performance and radiation dose associated with each mammographic system.
Main Methods:
- Mammograms were acquired using a standardized phantom (Wisconsin Mammographic Random Phantom, Model 152 A).
- Three imaging systems were evaluated: conventional film-screen, digital phosphor storage plate, and digital mammography.
- Image quality was assessed by the number of detectable details and entrance surface air kerma (radiation dose).
Main Results:
- Digital mammography detected the highest number of details (202/40.4%), followed closely by digital phosphor storage plate mammography (193/38.6%) and conventional film-screen (191/38.2%).
- No statistically significant difference in image quality was observed between the systems (p < 0.058).
- Entrance surface air kerma was lowest for digital mammography (7.02 mGy), followed by digital phosphor storage plate (7.60 mGy) and conventional film-screen (9.64 mGy).
Conclusions:
- Conventional film-screen mammography can be replaced by both digital phosphor storage plate mammography and digital mammography.
- Digital mammography systems offer comparable or superior image quality with potentially lower radiation doses.
- Further clinical trials are recommended to confirm these findings in patient populations.