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Our Services / DXA Scan

Body Composition Scan

The Advanced Body Composition report, available with the Body Logic scan, offers comprehensive measurements of the body, including the precise location of bone, fat, and muscle mass. This document breaks down the data so you can address questions about the report with our staff at the Center. This scan is highly beneficial to patients with metabolic syndrome, PCOS, obesity, anovulation caused by hormone imbalance and for customers who are in a weight loss program, athletes, police and fire dept. personnel.


What are the Adipose Indices on the Advanced Body Composition report and how are they used?


When looking at the Adipose Indices on the Advanced Body Composition report, keep in mind that the lower the numbers in the AM percentile column, the less fat there is compared to others of the same age. More specifically:

Total Body % Fat:  Indicates a client’s fat mass/total mass.

Fat Mass/Height2:  This refers to a client’s Fat Mass Index. It is a more accurate measure of obesity than Body Mass Index (BMI) because it calculates the amount of fat a client has relative to their height instead of total weight relative to height. The higher this number, the more fat they have.

Android/Gynoid ratio:  This measurement indicates whether a client is an “apple shape” vs. “pear shape,” with “Android” meaning abdomen and “Gynoid” meaning thighs. A value >1 indicates a client is more “apple shaped” which could mean a higher risk for cardiovascular disease, while a value <1 indicates more of a “pear shape”.

% Fat Trunk/% Fat Legs and Trunk/Limb Fat Mass Ratio:   While these measurements aren’t vitally important to everyday health monitoring, they demonstrate the distribution of fat in a client’s body and can be used clinically to track lipodystrophy.

EST VAT Mass, Volume, and Area:  These are measurements of visceral fat, the “bad fat” around the insides of organs. VAT area (cm2) > 100cm2 has been shown to be associated with an increased risk of metabolic syndrome and coronary heart disease.


What are the Lean Indices on the Advanced Body Composition report and how are they used?


When looking at the Lean Indices on the Advanced Body Composition® report, keep in mind that the higher the numbers in the AM percentile column, the more muscle there is compared to others of the same age. More specifically:

Lean/Height2 = Lean Mass Index:  Amount of lean mass a client has relative to height. The higher this number, the more muscle they have.

Appen. Lean/Height² (kg/m²):  The measurement of functional muscle in a client’s appendices (legs and arms) relative to their height. This value is linked to physical performance and is used clinically to monitor sarcopenia or other muscle disabilities. The higher the number, the more functional muscles a client has.


Why is the % body fat higher with the BodyLogic scan? Other methods, such as calipers or BodPod, measure much less.


The Body Logic scan is so accurate that it measures all fat in the body, both essential fat and storage fat. Storage fat is the fat clients want to lose, but humans need a certain amount of fat to survive – this is called “essential fat.” It is found in places like cell membranes, the central nervous system, the heart and lungs, and digestive system. On average, about 4% of body fat in men and 12% body fat in women is considered essential fat.


What are normal and not-normal values on a Body Logic scan?


For Total Body %, use the age matched graph on the top of the Advanced Body Composition report as a reference. If you falls in the dark blue area, that means he/she is leaner than 50% of people their age. If you fall in the light blue area, that means you have more body fat than 50% of people in your age range. The line in the middle is equal to the mean body fat % for your gender.


Fat Mass Index (Fat Mass/Height)1
Normal Excess Fat Obese Class I Obese Class II Obese Class III
Men 3 – 6 6 – 9 9-12 12-15 >15
Women 5 – 9 9 – 13 13- 17 17-21 >21

Visceral Fat Area2
Normal Increased Risk High Risk
<100cm2 100-160cm2 >160cm2

Lean Mass Index (Lean/Height)3
Normal Medium High
Men <18.7 18.7-21.0 >21.0
Women <14.9 14.9-17.2 >17.2

Kelly et al. Dual energy x-ray absorptiometry body composition reference values from NHANES. PLoS One 4 (9) (2009): e7038. 2. Nicklas et al. Visceral adipose tissue cutoffs associated with metabolic risk factors for coronary heart disease in women. Diabetes Care 26:1414-1420, 2003. 3. Coin et al. Fat-free mass and fat mass reference values by dual-energy x-ray absorptiometry (DEXA) in a 20-80 year-old Italian population. Clin Nutr. 2008 Feb;27(1):87-94.


Advanced Body Composition Report



Legend


1. Visual image of precise location of bone, lean mass, and fat mass

2. Plot of % Body Fat compared to age group

3. Precise Fat Mass, Lean Mass, and % Body Fat measurements of each area:

  •             Left Arm
  •             Right Arm
  •             Torso (Trunk)
  •             Abdomen (Android)
  •             Hips (Gynoid)
  •             Left Leg
  •             Right Leg

4. Calculation of Total Mass, Fat Mass, and Lean Mass to give overall % Body Fat

5. Estimated amount of visceral fat (the type of fat around internal organs associated with medical disorders such as metabolic syndrome, cardiovascular disease, and type 2 diabetes.




Legend


1. Graph of % Body Fat values over time

2. % Body Fat values over time

3. Fat Mass values over time

4. Lean Mass values over time

5. Visual comparison over time of changes in bone, lean mass, and fat mass



Frequently Asked Questions


The Body Logic scan offers comprehensive measurements of the body, including the precise location of bone, fat, and muscle mass. This information can help you and your healthcare provider assess the state of your health and define successful treatment plans and training programs to help you achieve your health goals. Learn more about the Body Logic scan through these frequently asked questions.


  • What is DXA?
  • What is the Advanced Body Composition report?
  • How precise is the Body Logic scan?
  • How should I prepare for a Body Logic scan?
  • How often can I get a Body Logic scan?
  • What is the radiation dose of a Body Logic scan?
  • Do you accept insurance for this service?
What is DXA?

DXA stands for Dual-energy X-ray Absorptiometry. It means two X-ray energies are used to measure the bone mineral and soft tissue inside your body to provide the most accurate body composition assessment.

What is the Advanced Body Composition report?

The Advanced Body Composition report is included with the Body Logic scan. It provides visual images of the body that show the precise location of bone, lean mass and fat mass. The color-coded system makes it easy for athletes and patients to see exactly where they have fat and muscle on their bodies and provides a visual comparison of changes in the body over time. Detailed measurements of the torso, hips, abdomen and both arms and legs accompany the image to give a complete picture of body composition.

How precise is the Body Logic scan?

The BodyLogic scan can measure as small as 1% changes in muscle and 2% changes in fat.

How should I prepare for a Body Logic scan?

For optimal results:

  • Wear light and comfortable clothing without any metal or jewelry. Avoid clothing with zippers, snaps, fasteners, belts or an underwire.
  • Be normally hydrated and empty bladder and bowels before the scan.
  • Do not eat 4-6 hours before the scan.
  • Do not exercise vigorously 4-6 hours before the scan.
  • For follow up BodyLogic scans, it is best to have them performed at the same time of day, and for women, the same day in their monthly cycle.
How often can I get a Body Logic scan?

The frequency of Body Logic scans is dependent on your circumstances, goals, and program. Work with your Healthcare provider to determine the best scan frequency for you.

What is the radiation dose of a Body Logic scan?

The radiation dose received during one Body Logic scan is approximately equivalent to one day of background radiation. Another way to think about the dose is it is less than the radiation dose you receive during a cross-country flight. The dose from a Body Logic scan is much less than a CT scan or a standard X-ray.

Do you accept insurance for this service?

Payment is due at the time of service as insurance is not accepted.


Nowitz et al. Short term in-vivo precision of whole body composition measurements on the Horizon A densitometer. Journal of Medical Imaging and Radiation Oncology. 2017

Shepherd, Ng, Sommer, Heymsfield. Bone (2017), Bone (2017), http://dx.doi.org/10.1016/j.bone.2017.06.010


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