|89th Annual Meeting Abstracts
Using 3-Dimensional Analysis to Quantify Volumetric Changes in the Breast after Fat Injection
Mi Hye Choi, MD1, Ahmed Fadl, MS2, Naveen Kumar, MD3, Michelle Quan, BA2, Oren M. Tepper, MD1, Kevin Small, MD4, Nolan S. Karp, MD1.
1New York University, New York, NY, USA, 2Stony Brook University School of Medicine, Stony Brook, NY, USA, 3St Barnabas Medical Center, Livingston, NJ, USA, 4NY Presbyterian (Cornell campus), New York, NY, USA.
The use of autologous fat has provided plastic surgeons with a natural injectable resource for breast augmentation or revision. Monitoring the volumetric changes of such procedures over time has been difficult due to the inherently subjective methods that we use to follow our patients. We have shown in previous work that 3-dimensional (3-D) imaging is an objective method to quantify postoperative results in the breast. The purpose of this study is to determine the percentage of volume retention over time in the breast after fat injection using 3D imaging.
Patients undergoing fat injection to the breast were offered the opportunity to participate in this study. 3D images were obtained using the Canfield Vectra system. 3-D images were then converted into 3-D surface scan data sets and further analyzed with Geomagic CAD software. Images were acquired preoperatively, weekly for the first 4 weeks postoperative, and monthly thereafter. In addition, 2-dimensional photos were also taken. Unique customized models were created from he patient’s pre-operative data and subsequent breast volumes were calculated with respect to each imaging time point. Additional volumetric deviation geographic histograms were created to quantify changes in volume per area in each operated breast.
A complete data series (a preoperative and at least one postoperative scan) was acquired for 17 patients yielding a total of 24 volumetrically augmented breasts. The volume of the injected fat appears to stabilize approximately at about 60 days postoperative. The retention volume of the injected fat appears to be about 50% in our preliminary data. Multiple illustrative cases will be presented.
Based on the devised algorithm which utilizes 3D imaging at its foundation, it has been shown that accurate volumetric values can be calculated for the breast after fat injection during the postoperative period. The volume of injected fat appears to stabilize at about 60 Days with approximately 50 percent of the injected fat persisting long term. Longer term follow up and more patient data are pending. The ability to trend the volume changes over time in fat injected breasts, allows surgeons to be able to better assess the needed volume preoperatively and to more accurately inject the fat during surgery.