Body Mass Index

3D Body Scanning

3D Body Scanning

Today anthropometry can be performed with three-dimensional body scanners. 

Once a scan is taken (a 40-second process), the scan data is used to generate measurements, along with a three-dimensional view of the body. 

The output of whole body scanners is a cloud of points, which are typically converted into a triangulated mesh. This step is used to support the 3D visualization of the surface and the extraction of meaningful anthropometric landmarks and measurements.

Body Mass Index (BMI): Definition and Limitations

The Body Mass Index (BMI) or Quetelet index is a value derived from the weight (i.e. mass) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in meters. 

The BMI is an attempt to quantify the amount of tissue mass (muscle, fat, and bone) in an individual, and then categorize that person as underweightnormal weightoverweight, or obese based on that value. 

 

Surface-Based Body Shape Index

The Surface-based Body Shape Index (SBSI) was proposed by West Virginia University computer scientists Syed Ashiqur Rahman and Donald Adjeroh as an alternative to BMI.

The study examined data on 11,808 subjects from the National Health and Human Nutrition Examination Surveys (NHANES) 1999–2004.

The study concluded that SBSI outperformed BMI, waist circumference, and A Body Shape Index (ABSI) as a predictor of all-cause mortality. 

However, the study did not specify the recommended healthy ranges for SBSI.

Body Scanning

Today anthropometry can be performed with three-dimensional body scanners. 

Once a scan is taken (a 40-second process), the scan data is used to generate measurements, along with a three-dimensional view of the body. 

The output of whole body scanners is a cloud of points, which are typically converted into a triangulated mesh. This step is used to support the 3D visualization of the surface and the extraction of meaningful anthropometric landmarks and measurements.