SU-GG-I-130: An Evaluation of Image Quality and Dose for a Hologic Selenia Digital Mammography System with a Tungsten Anode X-Ray Tube

Fischer has been developing a fused full-field digital mammography and ultrasound (FFDMUS) system funded by the National Institute of Health (NIH). In FFDMUS, two sets of acquisitions are performed: 2-D X-ray and 3-D ultrasound. The segmentation of acquired lesions in phantom images is important: (i) to assess the image quality of X-ray and ultrasound images; (ii) to register multi-modality images; and (iii) to establish an automatic lesion detection methodology to assist the radiologist. In this paper we developed lesion segmentation strategies for ultrasound and X-ray images acquired using FFDMUS. For ultrasound lesion segmentation, a signal-to-noise (SNR)-based method was adapted. For X-ray segmentation, we used gradient vector flow (GVF)-based deformable model. The performance of these segmentation algorithms was evaluated. We also performed partial volume correction (PVC) analysis on the segmentation of ultrasound images. For X-ray lesion segmentation, we also studied the effect of PDE smoothing on GVF's ability to segment the lesion. We conclude that ultrasound image qualities from FFDMUS and Hand-Held ultrasound (HHUS) are comparable. The mean percentage error with PVC was 4.56% (4.31%) and 6.63% (5.89%) for 5 mm lesion and 3 mm lesion respectively. The mean average error from the segmented X-ray images with PDE yielded an average error of 9.61%. We also tested our program on synthetic datasets. The system was developed for Linux workstation using C/C++.

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Monte Carlo derivation of filtered tungsten anode X-ray spectra for dose computation in digital mammography

Radiologia Brasileira ◽

10.1590/0100-3984.2014.0108 ◽

2015 ◽

Vol 48 (6) ◽

pp. 363-367 ◽

Cited By ~ 2

Author(s):

Lucas Paixão ◽

Bruno Beraldo Oliveira ◽

Carolina Viloria ◽

Marcio Alves de Oliveira ◽

Maria Helena Araújo Teixeira ◽

...

Keyword(s):

Monte Carlo ◽

Digital Mammography ◽

Relative Difference ◽

Monte Carlo Code ◽

Solid State Detector ◽

X Ray ◽

Direct Radiography ◽

State Detector ◽

Tungsten Anode ◽

Good Agreement

Abstract Objective: Derive filtered tungsten X-ray spectra used in digital mammography systems by means of Monte Carlo simulations. Materials and Methods: Filtered spectra for rhodium filter were obtained for tube potentials between 26 and 32 kV. The half-value layer (HVL) of simulated filtered spectra were compared with those obtained experimentally with a solid state detector Unfors model 8202031-H Xi R/F & MAM Detector Platinum and 8201023-C Xi Base unit Platinum Plus w mAs in a Hologic Selenia Dimensions system using a direct radiography mode. Results: Calculated HVL values showed good agreement as compared with those obtained experimentally. The greatest relative difference between the Monte Carlo calculated HVL values and experimental HVL values was 4%. Conclusion: The results show that the filtered tungsten anode X-ray spectra and the EGSnrc Monte Carlo code can be used for mean glandular dose determination in mammography.

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Effect of area x-ray beam equalization on image quality and dose in digital mammography

Physics in Medicine and Biology ◽

10.1088/0031-9155/49/16/003 ◽

2004 ◽

Vol 49 (16) ◽

pp. 3539-3557 ◽

Cited By ~ 9

Author(s):

Jerry Wong ◽

Tong Xu ◽

Adeel Husain ◽

Huy Le ◽

Sabee Molloi

Keyword(s):

Image Quality ◽

Digital Mammography ◽

X Ray ◽

Area X

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