Zobrazeno 1 - 10
of 411
pro vyhledávání: '"Chris C. Shaw"'
Publikováno v:
Medical Physics. 42:5238-5251
Purpose: Digital tomosynthesis (DTS) has been shown to be useful for reducing the overlapping of abnormalities with anatomical structures at various depth levels along the posterior–anterior (PA) direction in chest radiography. However, DTS provide
Publikováno v:
Medical Physics. 42:3063-3075
Purpose: Cone beam breast computed tomography (breast CT) with true three-dimensional, nearly isotropic spatial resolution has been developed and investigated over the past decade to overcome the problem of lesions overlapping with breast anatomical
Publikováno v:
Medical physics. 39(6Part24)
Purpose: To investigate the advantage of a high resolution flat panel detector for improving the visibility of microcalcifications (MCs) in cone beam breast CTMethods: A paraffin cylinder was used to simulate a 100% adipose breast. Calcium carbonate
Autor:
Chris C. Shaw, Gary J. Whitman, Y. Shen, Wei Tse Yang, Yuncheng Zhong, Chao Jen Lai, Tianpeng Wang
Publikováno v:
Medical physics. 39(6Part24)
Purpose: To develop and validate algorithms for extraction and insertion of three‐dimensional (3D) profiles of tumor masses in cone beam breast CT (CBBCT) images to create simulated abnormality for evaluation with observer performance study. Method
Publikováno v:
Medical Physics. 38:6489-6501
Purpose: The scan equalization digital mammography (SEDM) technique combines slot scanning and exposure equalization to improve low-contrast performance of digital mammography in dense tissue areas. In this study, full-field digital mammography (FFDM
Autor:
Chris C. Shaw, Z. You, Yuncheng Zhong, Y. Shen, Chao Jen Lai, Xinming Liu, Tianpeng Wang, Y. yi, S. ge
Publikováno v:
Medical Physics. 38:6429-6442
Purpose: In this study, we used a small field high resolution detector in conjunction with a full field flat panel detector to implement and investigate the dual detector volume-of-interest (VOI) cone beam breast computed tomography (CBCT) technique
Autor:
Tianpeng Wang, Chao Jen Lai, Chris C. Shaw, S. ge, Y. Shen, Y. yi, Xinming Liu, Tao Han, Yuncheng Zhong, Z. You
Publikováno v:
Medical Physics. 38:589-597
Purpose: In this article, we describe a method to estimate the spatial dose variation, average dose and mean glandular dose (MGD) for a real breast using Monte Carlo simulation based on cone beam breast computed tomography (CBBCT) images. We present
Publikováno v:
Medical Physics. 38:23-33
Purpose: To investigate and compare the scatter rejection properties and low-contrast performance of the scan equalization digital radiography (SEDR) technique to the slot-scan and conventional full-field digital radiography techniques for chest imag
Autor:
Chris C. Shaw, Tao Han, Lingyun Chen, Yuncheng Zhong, Xinming Liu, Chao Jen Lai, Y. Shen, Tianpeng Wang
Publikováno v:
Physics in Medicine and Biology. 54:6959-6978
It is well recognized in projection radiography that low-contrast detectability suffered in heavily attenuating regions due to excessively low x-ray fluence to the image receptor and higher noise levels. Exposure equalization can improve image qualit
Autor:
Xinming Liu, S. ge, Wei Tse Yang, Gary J. Whitman, Y. Shen, Tianpeng Wang, Chao Jen Lai, Tao Han, Y. yi, Yuncheng Zhong, Lingyun Chen, Huojun Zhang, Chris C. Shaw
Publikováno v:
Physics in Medicine and Biology. 54:6691-6709
With volume-of-interest (VOI) cone beam computed tomography (CBCT) imaging, one set of projection images are acquired with the VOI collimator at a regular or high exposure level and the second set of projection images are acquired without the collima