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Article

Visual Evaluation of Ultrafast MRI in the Assessment of Residual Breast Cancer after Neoadjuvant Systemic Therapy: A Preliminary Study Association with Subtype

1
Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Kyoto 606-8507, Japan
2
Department of Diagnostic Radiology, Kansai Electric Power Hospital, 2-1-7, Fukushima, Osaka 553-0003, Japan
3
Institute for Advancement of Clinical and Translational Science (iACT), Kyoto University Hospital, 4 Shogoin-Kawaharacho, Kyoto 606-8507, Japan
4
Department of Translational Medicine, Diagnostic Radiology, Lund University, Skåne University Hospital, 205-02 Malmo, Sweden
5
Department of Diagnostic Radiology, Kyoto Katsura Hospital, Yamadahirao-cho, Kyoto 615-8256, Japan
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MR Application Predevelopment, Siemens Healthcare GmbH, Allee am Roethelheimpark 2, 91052 Erlangen, Germany
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Department of Diagnostic Pathology, Kyoto University Hospital, 54 Shogoin-Kawaharacho, Kyoto 606-8507, Japan
8
Department of Breast Surgery, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Kyoto 606-8507, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Emilio Quaia
Tomography 2022, 8(3), 1522-1533; https://doi.org/10.3390/tomography8030125
Received: 15 May 2022 / Revised: 7 June 2022 / Accepted: 9 June 2022 / Published: 10 June 2022
(This article belongs to the Section Cancer Imaging)
The purpose of this study was to investigate the diagnostic performance of ultrafast DCE (UF-DCE) MRI after the completion of neoadjuvant systemic therapy (NST) in breast cancer. In this study, MR examinations of 55 post-NST breast cancers were retrospectively analyzed. Residual tumor sizes were measured in the 20th phase of UF-DCE MRI, early and delayed phases of conventional DCE MRI, and high spatial-resolution CE MRI (UF, early, delayed, and HR, respectively). The diagnostic performance for the detection of residual invasive cancer was calculated by ROC analysis. The size difference between MRI and pathological findings was analyzed using the Wilcoxon signed-rank test with the Bonferroni correction. The overall AUC was highest for UF (0.86 and 0.88 for readers 1 and 2, respectively). The difference in imaging and pathological sizes for UF (5.7 ± 8.2 mm) was significantly smaller than those for early, delayed, and HR (p < 0.01). For luminal subtype breast cancer, the size difference was significantly smaller for UF and early than for delayed (p < 0.01). UF-DCE MRI demonstrated higher AUC and specificity for the more accurate detection of residual cancer and the visualization of tumor extent than conventional DCE MRI. View Full-Text
Keywords: breast neoplasm; magnetic resonance imaging; treatment breast neoplasm; magnetic resonance imaging; treatment
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MDPI and ACS Style

Honda, M.; Kataoka, M.; Iima, M.; Ota, R.; Ohashi, A.; Kishimoto, A.O.; Miyake, K.K.; Nickel, M.D.; Yamada, Y.; Toi, M.; Nakamoto, Y. Visual Evaluation of Ultrafast MRI in the Assessment of Residual Breast Cancer after Neoadjuvant Systemic Therapy: A Preliminary Study Association with Subtype. Tomography 2022, 8, 1522-1533. https://doi.org/10.3390/tomography8030125

AMA Style

Honda M, Kataoka M, Iima M, Ota R, Ohashi A, Kishimoto AO, Miyake KK, Nickel MD, Yamada Y, Toi M, Nakamoto Y. Visual Evaluation of Ultrafast MRI in the Assessment of Residual Breast Cancer after Neoadjuvant Systemic Therapy: A Preliminary Study Association with Subtype. Tomography. 2022; 8(3):1522-1533. https://doi.org/10.3390/tomography8030125

Chicago/Turabian Style

Honda, Maya, Masako Kataoka, Mami Iima, Rie Ota, Akane Ohashi, Ayami O. Kishimoto, Kanae K. Miyake, Marcel D. Nickel, Yosuke Yamada, Masakazu Toi, and Yuji Nakamoto. 2022. "Visual Evaluation of Ultrafast MRI in the Assessment of Residual Breast Cancer after Neoadjuvant Systemic Therapy: A Preliminary Study Association with Subtype" Tomography 8, no. 3: 1522-1533. https://doi.org/10.3390/tomography8030125

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