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Three-Dimensional Imaging and Breast Measurements: How Predictable Are We?

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Background Outcomes in aesthetic breast surgery are dependent on preoperative breast measurements. The accuracy of 3-dimensional (3D) imaging in measuring critical landmarks in augmentation mammaplasty surgery has not been described.… Click to show full abstract

Background Outcomes in aesthetic breast surgery are dependent on preoperative breast measurements. The accuracy of 3-dimensional (3D) imaging in measuring critical landmarks in augmentation mammaplasty surgery has not been described. Objectives We aimed to determine the predictability of 3D imaging compared to direct measurements. Methods Two raters measured the breasts of 28 women using four anthropometric (direct) measurements: sternal notch to nipple distance (Sn-N), nipple to midline (N-M), nipple to inframammary-fold distance under maximal stretch (N-IMF), and base width (BW). Measurements (indirect) were also obtained using 3D imaging. Statistical analysis was completed with Bland-Altman plots. Results Each rater collected 56 data points for each of the four measurements. This resulted in 224 data points per rater. The Sn-N measurement had a 0.05 cm (SD, 0.65) difference in the mean values obtained between direct and indirect measurements. N-M had a mean difference of 0.20 cm (SD, 0.62). The mean difference for BW was 1.26 cm (SD, 0.69 cm), and N-IMF showed a mean difference of 1.22 cm (SD, 0.74 cm). Three-dimensional imaging overestimated Sn-N, N-M, and BW, while it underestimated N-IMF. Conclusions Three-dimensional imaging has good utility and is most accurate for Sn-N and N-M measurements, which require frontal imaging of a standing patient. BW and N-IMF are less accurate due to obscured landmarks on frontal imaging. The medial and lateral aspects of the breast may be obscured when measuring BW on 3D imaging, which may explain this difference. N-IMF is a dynamic measurement, and as a result, 3D imaging has limited ability to measure this distance accurately. Level of Evidence 3

Keywords: three dimensional; difference; breast; breast measurements; dimensional imaging; imf

Journal Title: Aesthetic Surgery Journal
Year Published: 2018

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