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Original research article


Dedicated Cone-beam Breast Computed Tomography and Diagnostic Mammography: Comparison of Radiation Dose, Patient Comfort, And Qualitative Review of Imaging Findings in BI-RADS 4 and 5 Lesions

Avice M O'ConnellDaniel Kawakyu-O'Connor
Department of Imaging Sciences, University of Rochester Medical Center, Highland Breast Imaging Center, Rochester, NY, USA
Date of Submission: 22-Nov-2011, Date of Acceptance: 13-Feb-2012, Date of Web Publication: 25-Feb-2012.
Corresponding Author:
Corresponding Author

Avice M. O’Connell

Department of Imaging Sciences, University of Rochester Medical Center, Highland Breast Imaging Center, 500 Red Creek Drive, Rochester, NY 14623, USA.
E-mail: avice_oconnell@urmc.rochester. edu

Corresponding Author:
Corresponding Author

Avice M. O’Connell

Department of Imaging Sciences, University of Rochester Medical Center, Highland Breast Imaging Center, 500 Red Creek Drive, Rochester, NY 14623, USA.
E-mail: avice_oconnell@urmc.rochester. edu

DOI: 10.4103/2156-7514.93274 Facebook Twitter Google Linkedin

ABSTRACT



Objective: This pilot study was undertaken to compare radiation dose, relative visibility/conspicuity of biopsy-proven lesions, and relative patient comfort in diagnostic mammography and dedicated cone-beam breast computed tomography (CBBCT) in Breast Imaging-Reporting and Data System (BI-RADS)® 4 or 5 lesions.
Materials and Methods: Thirty-six consecutive patients (37 breasts) with abnormal mammographic and/ or ultrasound categorized as BI-RADS® 4 or 5 lesions were evaluated with CBBCT prior to biopsy. Administered radiation dose was calculated for each modality. Mammograms and CBBCT images were compared side-by-side and lesion visibility/conspicuity was qualitatively scored. Histopathology of lesions was reviewed. Patients were administered a survey for qualitative evaluation of comfort between the two modalities.
Results: CBBCT dose was similar to or less than diagnostic mammography, with a mean dose of 9.4 mGy (±3.1 SD) for CBBCT vs. 16.9 mGy (±6.9 SD) for diagnostic mammography in a total of 37 imaged breasts (P<0.001). Thirty-three of 34 mammographic lesions were scored as equally or better visualized in CBBCT relative to diagnostic mammography. Characterization of high-risk lesions was excellent. Patients reported greater comfort in CBBCT imaging relative to mammography.
Conclusion: Our experience of side-by-side comparison of CBBCT and diagnostic mammography in BI-RADS® 4 and 5 breast lesions demonstrated a high degree of correlation between the two modalities across a variety of lesion types. Owing to favorable radiation dose profile, excellent visualization of lesions, and qualitative benefits including improved patient comfort, excellent field-of-view, and more anatomical evaluation of lesion margins, CBBCT offers a promising modality for diagnostic evaluation of breast lesions.
Keywords: Breast CT, Mammography, Radiation Dose

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