“Topographic Shift”: a new digital approach to evaluating topographic changes of the female breast

Lotter, Luisa; Brébant, Vanessa; Eigenberger, Andreas; Hartmann, Robin; Mueller, Karolina; Baringer, Magnus; Prantl, Lukas; Schiltz, Daniel

doi:10.1007/s00404-020-05837-3

Cited by 5 publications

(7 citation statements)

References 25 publications

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“…On average, implants with 235.6 ml were chosen for augmentation (ranging from 150 ml to 355 ml). We could show in a recent study, that textured breast implants cause a topographic change, particularly on the upper breast, the décolleté [6].…”

Section: Implant Augmentationmentioning

confidence: 89%

Implants versus Lipograft – Analysis of Long-Term Results after Congenital Breast Asymmetry Procedure

Brébant¹,

Weiherer²,

Noisser³

et al. 2021

Preprint

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Congenital breast asymmetry represents a particular challenge to the classical techniques of plastic surgery due to a young group of patients. This study compares traditional breast augmentation using silicone implants to the more innovative lipograft technique regarding long-term results. To achieve this, we not only captured subjective parameters like satisfaction with outcome and symmetry, but also objective parameters such as breast volume and anthropometric measurements. Objective examination was performed manually and by using the Vectra® H2 photogrammetry scanning system. Patients who underwent implant augmentation and lipograft both showed no significant differences in patient´s satisfaction with surgical outcome (p = 0.55) and symmetry (p = 0.69). Furthermore, a breast symmetry of 93 % in both groups was reported. Likewise, no statistically significant volume difference between left and right breast was observed in both groups (p<0.41). However, on average, lipograft patients needed 1.3 procedures more until the desired result was achieved. In contrast, patients treated with implant-based breast augmentation usually need several implant changes during their life. In conclusion, both methods should be considered for patients with congenital breast asymmetry.

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Section: Implant Augmentationmentioning

confidence: 89%

Implants versus Lipograft – Analysis of Long-Term Results after Congenital Breast Asymmetry Procedure

Brébant¹,

Weiherer²,

Noisser³

et al. 2021

Preprint

Self Cite

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“…To assess the influence of the respective implants on the properties of the breasts, the “topographic shift” (TS) was determined. The TS describes the estimated mean distance of the “native” and “implanted” 3D-scan of the same breast in mm by laying one on top of the other [ 10 ]. The TS, inter-landmark distances and changes of the nipple position were determined.…”

Section: Methodsmentioning

confidence: 99%

“…Using this model, various objective calculations could be carried out. Evidence of a valid and reproducible analysis of the breast contour and its volumetry using this or similar methods has already been shown several times [ 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Methodsmentioning

confidence: 99%

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Intraoperative 3D Comparison of Round and Anatomical Breast Implants: Dispelling a Myth

Lotter

Zucal

Brébant

et al. 2021

JCM

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Background: Thanks to 3D imaging, it is possible to measure the influence of different parameters on breast augmentation. In this study, we compare the effect of different shapes and sizes of breast implants on the topography of the resulting breast. Furthermore, the impact of different breast implants on inter-landmark distances and on changes of the nipple position was assessed. Methods: This interventional prospective study was carried out on 10 female patients after collecting informed consent. 3D scans of the native and augmented breasts were performed intraoperatively with small, medium, and large sizes of both anatomical and round implants, resulting in a total of n = 130 single breast scans. These scans were analyzed for topographic shift quantification, nipple migration, and inter-landmark distances of the breast. Results: Implant size, but not implant shape leads to significant topographic shifts of the breast (p < 0.001 and p = 0.900, respectively). Both round and anatomical implants lead to a significantly higher volumetric increase in the upper quadrants compared to the lower quadrants (p < 0.001). Nipple migration into the superomedial quadrant was seen in about 90% of augmentations. No evident differences in inter-landmark distances were observed when round and anatomical implants of different sizes were compared. Conclusions: Implant size rather than shape influences the postoperative aesthetic results. No significant difference in topographic shift was found comparing round and anatomical implants, suggesting that both implant shapes result in comparable aesthetic outcomes.

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“…Last but most importantly, the region of interest, i.e., the breast, obviously cannot be well separated from the rest of the thorax when considering 3D breast scans. This is primarily because the chest wall separating the breast from the thorax cannot be captured using 3D surface scanning devices, but also due to the reason that no commonly accepted and exact definition of the breast contour exists, see, e.g., [35]. A statistical shape model built from 3D breast scans will therefore necessarily capture also shape variations of the thorax, even after pose standardization.…”

Section: Challengesmentioning

confidence: 99%

Learning the shape of female breasts: an open-access 3D statistical shape model of the female breast built from 110 breast scans

et al. 2022

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We present the Regensburg Breast Shape Model (RBSM)—a 3D statistical shape model of the female breast built from 110 breast scans acquired in a standing position, and the first publicly available. Together with the model, a fully automated, pairwise surface registration pipeline used to establish dense correspondence among 3D breast scans is introduced. Our method is computationally efficient and requires only four landmarks to guide the registration process. A major challenge when modeling female breasts from surface-only 3D breast scans is the non-separability of breast and thorax. In order to weaken the strong coupling between breast and surrounding areas, we propose to minimize the variance outside the breast region as much as possible. To achieve this goal, a novel concept called breast probability masks (BPMs) is introduced. A BPM assigns probabilities to each point of a 3D breast scan, telling how likely it is that a particular point belongs to the breast area. During registration, we use BPMs to align the template to the target as accurately as possible inside the breast region and only roughly outside. This simple yet effective strategy significantly reduces the unwanted variance outside the breast region, leading to better statistical shape models in which breast shapes are quite well decoupled from the thorax. The RBSM is thus able to produce a variety of different breast shapes as independently as possible from the shape of the thorax. Our systematic experimental evaluation reveals a generalization ability of 0.17 mm and a specificity of 2.8 mm. To underline the expressiveness of the proposed model, we finally demonstrate in two showcase applications how the RBSM can be used for surgical outcome simulation and the prediction of a missing breast from the remaining one. Our model is available at https://www.rbsm.re-mic.de/.

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“Topographic Shift”: a new digital approach to evaluating topographic changes of the female breast

Cited by 5 publications

References 25 publications

Implants versus Lipograft – Analysis of Long-Term Results after Congenital Breast Asymmetry Procedure

Implants versus Lipograft – Analysis of Long-Term Results after Congenital Breast Asymmetry Procedure

Intraoperative 3D Comparison of Round and Anatomical Breast Implants: Dispelling a Myth

Learning the shape of female breasts: an open-access 3D statistical shape model of the female breast built from 110 breast scans

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