Chinese Journal of Lasers, Volume. 39, Issue 1, 104002(2012)
Correction of Axial Intensity Drop for Digital Tomosynthesis Reconstructed Image
As a new and developing medical imaging technique, the digital tomosynthesis imaging (DTS) can provide researchers with confidence to distinguish the overlapping lesion tissue and make exact lesion-localizing. DTS employs the filtered backprojection algorithm for its rapid reconstruction speed and high reconstruction quality and reconstructs a series of the coronal images. However, the digital tomosynthesis insufficient dataset causes the hat-like intensity drop in its filtered backprojection reconstructed images along the rotation axis. The cone angle impact on the digital tomosynthesis axial intensity drop is analyzed and a reciprocal-cosine weighted intensity correction is introduced. To validate the effect of the axial intensity drop correction method, a DTS system is designed and built up and the anthropomorphic breast phantom is reconstructed with the reciprocal-cosine weighted correction method under different cone angle respectively. The reconstruction results demonstrate that the correction method can effectively minimize the axial intensity drop in digital tomosynthesis reconstructed images.
Get Citation
Copy Citation Text
Miao Hui, Zhao Huijuan, Gao Feng, Zhou Zhongxing. Correction of Axial Intensity Drop for Digital Tomosynthesis Reconstructed Image[J]. Chinese Journal of Lasers, 2012, 39(1): 104002
Category: biomedical photonics and laser medicine
Received: Jul. 26, 2011
Accepted: --
Published Online: Dec. 12, 2011
The Author Email: Hui Miao (miaohui@tju.edu.cn)