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Erschienen in: Breast Cancer Research and Treatment 1/2020

14.01.2020 | Clinical trial

Double reading of diffusion-weighted magnetic resonance imaging for breast cancer detection

verfasst von: Anna Rotili, Rubina Manuela Trimboli, Silvia Penco, Filippo Pesapane, Priyan Tantrige, Enrico Cassano, Francesco Sardanelli

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 1/2020

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Abstract

Purpose

To estimate the performance of diffusion-weighted imaging (DWI) for breast cancer detection.

Methods

Consecutive breast magnetic resonance imaging examinations performed from January to September 2016 were retrospectively evaluated. Examinations performed before/after neoadjuvant therapy, lacking DWI sequences or reference standard were excluded; breasts after mastectomy were also excluded. Two experienced breast radiologists (R1, R2) independently evaluated only DWI. Final pathology or > 1-year follow-up served as reference standard. Mc Nemar, χ2, and κ statistics were applied.

Results

Of 1,131 examinations, 672 (59.4%) lacked DWI sequence, 41 (3.6%) had no reference standard, 30 (2.7%) were performed before/after neoadjuvant therapy, and 10 (0.9%) had undergone bilateral mastectomy. Thus, 378 women aged 49 ± 11 years (mean ± standard deviation) were included, 51 (13%) with unilateral mastectomy, totaling 705 breasts. Per-breast cancer prevalence was 96/705 (13.6%). Per-breast sensitivity was 83/96 (87%, 95% confidence interval 78–93%) for both R1 and R2, 89/96 (93%, 86–97%) for double reading (DR) (p = 0.031); per-lesion DR sensitivity for cancers ≤ 10 mm was 22/31 (71%, 52–86%). Per-breast specificity was 562/609 (93%, 90–94%) for R1, 538/609 (88%, 86–91%) for R2, and 526/609 (86%¸ 83–89%) for DR (p < 0.001). Inter-observer agreement was substantial (κ = 0.736). Acquisition time varied from 3:00 to 6:22 min:s. Per-patient median interpretation time was 46 s (R1) and 51 s (R2).

Conclusions

DR DWI showed a 93% sensitivity and 88% specificity, with 71% sensitivity for cancers ≤ 10 mm, pointing out a potential for DWI as stand-alone screening method.
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Metadaten
Titel
Double reading of diffusion-weighted magnetic resonance imaging for breast cancer detection
verfasst von
Anna Rotili
Rubina Manuela Trimboli
Silvia Penco
Filippo Pesapane
Priyan Tantrige
Enrico Cassano
Francesco Sardanelli
Publikationsdatum
14.01.2020
Verlag
Springer US
Erschienen in
Breast Cancer Research and Treatment / Ausgabe 1/2020
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-019-05519-y

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