Downie Jeanine, Kaspar Miroslav
J Drugs Dermatol. 2016 Apr;15(4):491-5.
Noninvasive body shaping methods seem to be an ascending part of the aesthetics market. As a result, the pressure to develop reliable methods for the collection and presentation of their results has also increased. The most used techniques currently include ultrasound measurements of fat thickness in the treated area, caliper measurements, bioimpedance-based scale measurements or circumferential tape measurements. Although these are the most used techniques, almost all of them have some limitations in reproducibility and/or accuracy. This study shows Magnetic Resonance Imaging (MRI) as the new method for the presentation of results in the body shaping industry.
Six subjects were treated by a contactless selective radiofrequency device (BTL Vanquish ME, BTL Industries Inc., Boston, MA). The MRI fat thickness was measured at the baseline and at 4-weeks following the treatment. In addition to MRI images and measurements, digital photographs and anthropometric evaluations such as weight, abdominal circumference, and caliper fat thickness measurements were recorded. Abdominal fat thickness measurements from the MRI were performed from the same slices determined by the same tissue artefacts.
The MRI fat thickness difference between the baseline measurement and follow up visit showed an average reduction of 5.36 mm as calculated from the data of 5 subjects. One subject dropped out of study due to non-study related issues. The results were statistically significant based on the Student's T-test evaluation.
Magnetic resonance imaging abdominal fat thickness measurements seems to be the best method for the evaluation of fat thickness reduction after non-invasive body shaping treatments. In this study, this method shows average fat thickness reduction of 5.36 mm while the weight of the subjects didn't change significantly. A large spot size measuring 1317 cm(2) (204 square inches) covers the abdomen flank to flank. The average thickness of 5.36 mm of the fat layer reduced under the applicator translates into significant cumulative circumferential reduction. The reduction was not related with dieting.
非侵入性身体塑形方法似乎在美容市场中所占份额日益上升。因此，开发用于收集和展示其效果的可靠方法的压力也随之增加。目前最常用的技术包括对治疗区域脂肪厚度进行超声测量、卡尺测量、基于生物阻抗的体重秤测量或卷尺围度测量。尽管这些是最常用的技术，但几乎所有技术在可重复性和/或准确性方面都存在一些局限性。本研究展示了磁共振成像（MRI）作为身体塑形行业中呈现效果的新方法。
六名受试者接受了非接触式选择性射频设备（BTL Vanquish ME，BTL Industries Inc.，马萨诸塞州波士顿）的治疗。在基线时以及治疗后4周测量MRI脂肪厚度。除了MRI图像和测量结果外，还记录了数码照片以及体重、腹围和卡尺脂肪厚度测量等人体测量评估数据。MRI腹部脂肪厚度测量是在由相同组织伪影确定的相同切片上进行的。
根据5名受试者的数据计算，基线测量与随访之间的MRI脂肪厚度差异平均减少了5.36毫米。一名受试者因与研究无关的问题退出了研究。基于学生t检验评估，结果具有统计学意义。
磁共振成像腹部脂肪厚度测量似乎是评估非侵入性身体塑形治疗后脂肪厚度减少情况的最佳方法。在本研究中，该方法显示平均脂肪厚度减少了5.36毫米，而受试者的体重没有显著变化。一个大光斑尺寸为1317平方厘米（204平方英寸），可从一侧腹部覆盖到另一侧。施加器下方脂肪层平均减少5.36毫米的厚度转化为显著的累积周长减少。这种减少与节食无关。
