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Mammographic density assessed on paired raw and processed digital images and on paired screen-film and digital images across three mammography systems

Article scientifique 2016 Anglais

Résumé

BACKGROUND: Inter-women and intra-women comparisons of mammographic density (MD) are needed in research, clinical and screening applications; however, MD measurements are influenced by mammography modality (screen film/digital) and digital image format (raw/processed). We aimed to examine differences in MD assessed on these image types. METHODS: We obtained 1294 pairs of images saved in both raw and processed formats from Hologic and General Electric (GE) direct digital systems and a Fuji computed radiography (CR) system, and 128 screen-film and processed CR-digital pairs from consecutive screening rounds. Four readers performed Cumulus-based MD measurements (n = 3441), with each image pair read by the same reader. Multi-level models of square-root percent MD were fitted, with a random intercept for woman, to estimate processed-raw MD differences. RESULTS: respectively, mean √dense area difference 0.44 cm (95% CI: 0.36, 0.52)). This difference in √dense area was significant for direct digital systems (Hologic 0.50 cm (95% CI: 0.39, 0.61), GE 0.56 cm (95% CI: 0.42, 0.69)) but not for Fuji CR (0.06 cm (95% CI: -0.10, 0.23)). Additionally, within each system, reader-specific differences varied in magnitude and direction (p < 0.001). Conversion equations revealed differences converged to zero with increasing dense area. MD differences between screen-film and processed digital on the subsequent screening round were consistent with expected time-related MD declines. CONCLUSIONS: MD was slightly higher when measured on processed than on raw direct digital mammograms. Comparisons of MD on these image formats should ideally control for this non-constant and reader-specific difference.

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Byrnes, G., Stone, J., Tamimi, R. M., Heine, J., Vachon, C. M., Özmen, V., Pereira, A., Garmendia, M. L., Scott, C. G., Hipwell, J. H., Dickens, C., Schüz, J., Bertrand, K. A., Kwong, A., Giles, G. G., Hopper, J. L., Pérez‐Gómez, B., Pollán, M., Teo, S., Mariapun, S., Taib, N. A. M., Lajous, M., Lopez-Riduara, R., Rice, M. S., Romieu, I., Flugelman, A., Ursin, G., Qureshi, S. A., Ma, H., Lee, E.-J., Sirous, R., Sirous, M., Lee, J. W., Kim, J., Salem, D., Kamal, R., Hartman, M., Miao, H., Chia, K.-S., Nagata, C., Vinayak, S., Ndumia, R., Gils, C. H. V., Wanders, J. O. P., Pepłońska, B., Bukowska, A., Allen, S., Vinnicombe, S., Moss, S., Chiarelli, A. M., Linton, L., Maskarinec, G., Yaffe, M. J., Boyd, N. F., dos‐Santos‐Silva, I., & McCormack, V. (2016). Mammographic density assessed on paired raw and processed digital images and on paired screen-film and digital images across three mammography systems. https://doi.org/10.1186/s13058-016-0787-0

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Auteur(s)

Graham Byrnes Jennifer Stone Rulla M. Tamimi John Heine Celine M. Vachon Vahit Özmen Ana Pereira María Luisa Garmendia Christopher G. Scott John H. Hipwell Caroline Dickens Joachim Schüz Kimberly A. Bertrand Ava Kwong Graham G. Giles John L. Hopper Beatriz Pérez‐Gómez Marina Pollán Soo‐Hwang Teo Shivaani Mariapun Nur Aishah Mohd Taib Martín Lajous Ruy Lopez-Riduara Megan S. Rice Isabelle Romieu Anath Flugelman Giske Ursin Samera Azeem Qureshi Huiyan Ma Eun-Jung Lee Reza Sirous Mehri Sirous Jong Won Lee Jisun Kim Dorria Salem Rasha Kamal Mikael Hartman Hui Miao Kee-Seng Chia Chisato Nagata Sudhir Vinayak Rose Ndumia Carla H. van Gils Johanna O. P. Wanders Beata Pepłońska Agnieszka Bukowska Steve Allen Sarah Vinnicombe Sue Moss Anna M. Chiarelli Linda Linton Gertraud Maskarinec Martin J. Yaffe Norman F. Boyd Isabel dos‐Santos‐Silva Valerie McCormack

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