TY - GEN
T1 - A three-dimensional linear model for breast tomosynthesis
AU - Zhao, Bo
AU - Zhao, Wei
PY - 2007
Y1 - 2007
N2 - Breast tomosynthesis alleviates the obscuring effects of overlapping breast tissue overlap in the diagnosis of breast cancer in screening mammography. In breast tomosynthesis, multiple projection images are acquired when the x-ray tube travels within a limited angular range, typically < 50°. The projection images are reconstructed into tomographic slices that are parallel to the detector surface. Factors affecting the image quality of breast tomosynthesis include detector performance, acquisition geometry and reconstruction method. To investigate the impact of each factor, we built a three dimensional linear system model for breast tomsynthesis, validated it using experimental measurements of linear system parameters including noise power spectrum (NPS) and presampling modulation transfer function (MTF). Experiments were performed on a prototype breast tomosynthesis system equipped with an amorphous selenium (a-Se) digital mammography detector. Filtered backprojection (FBP) method was used for image reconstruction. Due to the limited angular range, the reconstructed 3D volume (512x512x40) had an anisotropic voxel size (0.085x0.085x1mm3). Scatter free uniform images were acquired for NPS analysis and an edge phantom was imaged for MTF measurements. It was found that the model agreed well with measurement, hence can be used to predict the imaging performance with different parameters and lead to optimization of breast tomosynthesis.
AB - Breast tomosynthesis alleviates the obscuring effects of overlapping breast tissue overlap in the diagnosis of breast cancer in screening mammography. In breast tomosynthesis, multiple projection images are acquired when the x-ray tube travels within a limited angular range, typically < 50°. The projection images are reconstructed into tomographic slices that are parallel to the detector surface. Factors affecting the image quality of breast tomosynthesis include detector performance, acquisition geometry and reconstruction method. To investigate the impact of each factor, we built a three dimensional linear system model for breast tomsynthesis, validated it using experimental measurements of linear system parameters including noise power spectrum (NPS) and presampling modulation transfer function (MTF). Experiments were performed on a prototype breast tomosynthesis system equipped with an amorphous selenium (a-Se) digital mammography detector. Filtered backprojection (FBP) method was used for image reconstruction. Due to the limited angular range, the reconstructed 3D volume (512x512x40) had an anisotropic voxel size (0.085x0.085x1mm3). Scatter free uniform images were acquired for NPS analysis and an edge phantom was imaged for MTF measurements. It was found that the model agreed well with measurement, hence can be used to predict the imaging performance with different parameters and lead to optimization of breast tomosynthesis.
UR - http://www.scopus.com/inward/record.url?scp=48749118276&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=48749118276&partnerID=8YFLogxK
U2 - 10.1109/NEBC.2007.4413329
DO - 10.1109/NEBC.2007.4413329
M3 - Conference contribution
AN - SCOPUS:48749118276
SN - 1424410339
SN - 9781424410330
T3 - Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
SP - 163
EP - 164
BT - 33rd Annual Northeast Bioengineering Conference - Engineering Innovations in Life Sciences and Healthcare, NEBC
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 33rd Annual Northeast Bioengineering Conference, NEBC
Y2 - 10 March 2007 through 11 March 2007
ER -