Virtual Monochromatic Spectral CT Imaging in Preoperative Evaluations for Intraductal Spread of Breast Cancer: Comparison with Conventional CT and MRI

Overview

Journal Jpn J Radiol

Publisher Springer

Specialty Radiology

Date 2023 Feb 2

PMID 36729189

Authors

Yuko Matsuura

Takeshi Kamitani

Koji Sagiyama

Yuzo Yamasaki

Takuya Hino

Makoto Kubo

Hideki Ijichi

Hidetaka Yamamoto

Hidetake Yabuuchi

Kousei Ishigami

Affiliations

Soon will be listed here.

Abstract

Purpose: To investigate the efficacy of virtual monochromatic spectral computed tomography imaging (VMI) in the preoperative evaluation for intraductal spread of breast cancer.

Materials And Methods: Twenty-four women who underwent spectral CT and were pathologically diagnosed with ductal carcinoma with a ≥ 2-cm noninvasive component were retrospectively enrolled in Group 1. Twenty-two women with 22 lesions pathologically diagnosed with ductal carcinoma in situ or microinvasive carcinoma were enrolled in Group 2. We compared the contrast-to-noise ratios (CNRs) of the lesions on conventional 120-kVp CT images and 40-keV VMIs in Group 1. Two board-certified radiologists measured the maximum diameters of enhancing areas on 120-kVp CT, 40-keV VMI, and MRI in Group 2 and compared with histopathological sizes.

Results: The quantitative assessment of Group 1 revealed that the mean ± SD of the CNRs in the 40-keV images were significantly greater than those in the 120-kVp images (5.5 ± 1.9 vs. 3.6 ± 1.5, p < 0.0001). The quantitative assessment of Group 2 demonstrated that the lesion size observed in the conventional 120-kVp CT images by both readers was significantly underestimated as compared to the histopathological size (p = 0.017, 0.048), whereas both readers identified no significant differences between the lesion size measured on 40-keV VMI and the histopathological data. In a comparison with MRI, 40-keV VMI provided measurement within a 10-mm error range in more lesions as compared to the conventional 120-kVp CT.

Conclusion: VMI improves the evaluation of intraductal spread and is useful for the preoperative evaluations of breast cancer.

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