Validation and Evaluation of a Portable Body Scanner for Determination of Obesity

用于确定肥胖的便携式身体扫描仪的验证和评估

• 批准号: 7677970
• 负责人: Jeanne Elizabeth Freeland-Graves
• 金额: $ 20.45万
• 依托单位: UNIVERSITY OF TEXAS AT AUSTIN
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7677970
• 关键词: 3-Dimensional; Abdomen; Adult; Air; Algorithms; Area; Body Image; Body Size; Body fat; Caliber; Calibration; Central obesity; Clinical; Computer Vision Systems; Data; Diabetes Mellitus; Dual-Energy X-Ray Absorptiometry; Epidemic; Evaluation; Fatty acid glycerol esters; Goals; Health; Height; Human; Human body; Image; Magnetic Resonance Imaging; Measurement; Measures; Methods; Modeling; Nature; Obesity; Overweight; Personal Computers; Plethysmography; Population Study; Research; Risk; Scanning; Shapes; Sum; Surface; System; Techniques; Testing; Tissues; Use of New Techniques; Validation; abdominal fat; design; digital; indexing; instrument; photonics; reconstruction; skeletal; standard measure; subcutaneous; three-dimensional modeling; waist circumference

DESCRIPTION (provided by applicant): Obesity has reached epidemic levels in the U.S., with 66% of adults overweight and 32% of adults obese. The research uses the new technique of three-dimensional (3 D) photonic scanning to create and validate an instrument that rapidly assesses obesity in clinical and field settings. The first aim is to develop a portable computer vision system of body imaging for 3 D surface imaging of the human body. The hardware system is designed from off-the- shelf components such as digital cameras, projectors, and personal computer. Algorithms for the 3D data are being developed and refined for calculation and system calibration for a small instrument. The second aim is to develop algorithms for surface reconstruction from 3D data in order to define a proper surface representation and to reconstruct a 3D model of the human body from incomplete and noisy data. The third aim begins the human measurement testing in 120 adults. Aim 3 is to estimate the size and shape of the reconstructed human body by a portable body imager and compare to current methods that assess obesity. Anthropometric parameters will be computed by a 3 second body scan via imaging and then compared to other methods of obesity assessment including BMI, waist circumference, sagittal abdominal diameter, bioimpedence, hydrodensitometry, dual energy X-ray absorptiometry, and air displacement plethysmography. The final aim is to validate body imaging as an indicator of central obesity (fat in the abdominal region, as opposed to subcutaneous depots) in a subset of 60 subjects because it is the abdominal fat that is most associated with health risks such as diabetes. Abdominal fat tissue as detected by magnetic resonance imaging scans will be compared to that calculated from 3 D body imaging. In sum, the non-contact, noninvasive nature of this new portable body scanner will produce a quick, inexpensive and objective measure of body size and type of obesity.

描述（由申请人提供）： 在美国，肥胖已达到流行水平，66% 的成年人超重，32% 的成年人肥胖。该研究使用三维 (3D) 光子扫描新技术来创建和验证一种能够在临床和现场环境中快速评估肥胖的仪器。 第一个目标是开发便携式人体成像计算机视觉系统，用于人体 3D 表面成像。硬件系统采用现成组件设计，例如数码相机、投影仪和个人计算机。 3D 数据的算法正在开发和完善，用于小型仪器的计算和系统校准。第二个目标是开发从 3D 数据进行表面重建的算法，以便定义正确的表面表示并从不完整和有噪声的数据重建人体的 3D 模型。第三个目标是对 120 名成年人进行人体测量测试。目标 3 是通过便携式身体成像仪估计重建人体的大小和形状，并与当前评估肥胖的方法进行比较。人体测量参数将通过成像进行 3 秒身体扫描来计算，然后与其他肥胖评估方法进行比较，包括 BMI、腰围、矢状腹部直径、生物阻抗、水密度测定法、双能 X 射线吸收测定法和空气置换体积描记法。最终目标是在 60 名受试者中验证身体成像作为中心性肥胖（腹部区域的脂肪，而不是皮下脂肪）的指标，因为腹部脂肪与糖尿病等健康风险最相关。通过磁共振成像扫描检测到的腹部脂肪组织将与通过 3D 身体成像计算出的腹部脂肪组织进行比较。总之，这种新型便携式身体扫描仪的非接触式、非侵入性特性将能够快速、廉价且客观地测量身体尺寸和肥胖类型。