[Phantom study for the detection of simulated lesions in five different digital and one conventional mammography system].
OBJECTIVE
Experimental phantom study for the detection of simulated lesions with five different digital and one conventional screen-film mammography system.


METHODS
Three radiographs were obtained at various configurations of the phantom with one conventional screen-film system (Mammomat 3000 N) (Siemens), five digital systems (high resolution computed radiography system [Fuji/Siemens], one a-Si detector [GE Medical Systems], two a-Se detectors [Siemens; Hologic / Lorad] and one CCD detector [Fischer Imaging]), applying the same exposure parameters. The Wisconsin Mammographic Random Phantom, Model 152 A, was used. Five investigators with different experience in mammography (3 months to more than 4 years) evaluated the 18 randomly selected radiographs.


RESULTS
No significant differences were found in the detection rate of simulated breast lesions for conventional screen-film mammography (84.9 %), high resolution computed radiography (86.7 %) and digital mammography with an a-Si detector (89.8 %). Highly significantly better results (p < 0.001) were found with the two a-Se systems (97.3 %) and the CCD system (100 %).


CONCLUSIONS
Conventional screen-film mammography can be replaced by high resolution computed radiography and digital mammography with a-Si-, a-Se- and CCD-detectors. This has to be confirmed in further clinical studies.
Schulz-Wendtland
R
R
Radiologisches Institut, Universität Erlangen-Nürnberg. ruediger.schulz-wendtland@idr.imed.uni-erlangen.de
Hermann
K-P
KP
Lell
M
M
Böhner
C
C
Wenkel
E
E
Imhoff
K
K
Schmid
A
A
Krug
B
B
Bautz
W
W
D003198:Computer Simulation; D005260:Female; D006801:Humans; D008327:Mammography; D015588:Observer Variation; D019047:Phantoms, Imaging; D012680:Sensitivity and Specificity; D014984:Xeromammography