Ultrasound techniques to body fat measurement

[Guest guest]

Hello,

I've just learn something today, so I wanted to share with you : a societey

has invited me to show a portable device that uses ultrasound to measure

body fat. Honnestly, I did not know that this method could do such a thing

(it measures the thickness of the subcutaneous adipose tissue). When I came

back to my computer, I watched the litterature and found this article (see

below).

And air displacement plethysmography : never heard about it to measure body

fat ...

Very interesting.

Have a nice week end

--

Frederic Courtois, RD, Ph.D

Ann Nutr Metab. 2007;51(5):421-7.

Validation of ultrasound techniques applied to body fat measurement. A

comparison between ultrasound techniques, air displacement plethysmography

and bioelectrical impedance vs. dual-energy X-ray absorptiometry.

Pineau JC, Guihard-Costa AM, Bocquet M.

Dynamique de l'évolution humaine UPR 2147 CNRS, Paris, France.

pineau@...

AIMS: To evaluate the accuracy of body fat percentage (BF%) estimates from a

portable, non-traumatizing ultrasound device with high accuracy and

reliability compared to dual-energy X-ray absorptiometry (DEXA), the

reference technique. DESIGN: Cross-validation between ultrasound technique

(UT), DEXA, air displacement plethysmography (ADP) and bioelectrical

impedance (BIA) was developed in the study. SUBJECTS: A total of 89 healthy

subjects (41 women, 48 men), aged 48.4 +/- 17.7 (mean +/- SD), with Body

mass index (28.5 +/- 7.7 kg/m(2)) and body fat DEXA (29.6 +/- 10.8 kg)

participated. METHODS: BF% was measured using an UT associated with

anthropometric parameters and simultaneously, with the DEXA reference

technique, BIA and ADP. RESULTS: UT estimates of BF% were better correlated

with those of DEXA in both males and females (r = 0.98, SEE = 2.0) than with

ADP (r = 0.94, SEE = 3.7) or BIA (r = 0.92, SEE = 4.4). The UT in both

genders was better (TE = 1.0) than BIA (TE = 2.6) and ADP (TE = 3.0). The

95% limits of agreement were also better for the UT (-2%; 2%) than with BIA

(-5.1%; 4.9%) and ADP (-6.3%; 5.3%). CONCLUSIONS: The limits of agreement

with BIA and ADP are unacceptably high compared to a DEXA measure criterion.

The use of a new portable device based on a UT produced a very accurate BF%

estimate in relation to the DEXA reference technique.

[Guest guest]

Frederic,

How expensive is this device and how much training is required to use it?

Sharon Staier, MS, RD

Family and Sports Nutrition

Cape Cod, MA

USA

Frederic Courtois wrote:

Hello,

I've just learn something today, so I wanted to share with you : a societey

has invited me to show a portable device that uses ultrasound to measure

body fat. Honnestly, I did not know that this method could do such a thing

(it measures the thickness of the subcutaneous adipose tissue). When I came

back to my computer, I watched the litterature and found this article (see

below).

And air displacement plethysmography : never heard about it to measure body

fat ...

Very interesting.

Have a nice week end

--

Frederic Courtois, RD, Ph.D

Ann Nutr Metab. 2007;51(5):421-7.

Validation of ultrasound techniques applied to body fat measurement. A

comparison between ultrasound techniques, air displacement plethysmography

and bioelectrical impedance vs. dual-energy X-ray absorptiometry.

Pineau JC, Guihard-Costa AM, Bocquet M.

Dynamique de l'évolution humaine UPR 2147 CNRS, Paris, France.

pineau@...

AIMS: To evaluate the accuracy of body fat percentage (BF%) estimates from a

portable, non-traumatizing ultrasound device with high accuracy and

reliability compared to dual-energy X-ray absorptiometry (DEXA), the

reference technique. DESIGN: Cross-validation between ultrasound technique

(UT), DEXA, air displacement plethysmography (ADP) and bioelectrical

impedance (BIA) was developed in the study. SUBJECTS: A total of 89 healthy

subjects (41 women, 48 men), aged 48.4 +/- 17.7 (mean +/- SD), with Body

mass index (28.5 +/- 7.7 kg/m(2)) and body fat DEXA (29.6 +/- 10.8 kg)

participated. METHODS: BF% was measured using an UT associated with

anthropometric parameters and simultaneously, with the DEXA reference

technique, BIA and ADP. RESULTS: UT estimates of BF% were better correlated

with those of DEXA in both males and females (r = 0.98, SEE = 2.0) than with

ADP (r = 0.94, SEE = 3.7) or BIA (r = 0.92, SEE = 4.4). The UT in both

genders was better (TE = 1.0) than BIA (TE = 2.6) and ADP (TE = 3.0). The

95% limits of agreement were also better for the UT (-2%; 2%) than with BIA

(-5.1%; 4.9%) and ADP (-6.3%; 5.3%). CONCLUSIONS: The limits of agreement

with BIA and ADP are unacceptably high compared to a DEXA measure criterion.

The use of a new portable device based on a UT produced a very accurate BF%

estimate in relation to the DEXA reference technique.

[Guest guest]

Frederic,

How expensive is this device and how much training is required to use it?

Sharon Staier, MS, RD

Family and Sports Nutrition

Cape Cod, MA

USA

Frederic Courtois wrote:

Hello,

I've just learn something today, so I wanted to share with you : a societey

has invited me to show a portable device that uses ultrasound to measure

body fat. Honnestly, I did not know that this method could do such a thing

(it measures the thickness of the subcutaneous adipose tissue). When I came

back to my computer, I watched the litterature and found this article (see

below).

And air displacement plethysmography : never heard about it to measure body

fat ...

Very interesting.

Have a nice week end

--

Frederic Courtois, RD, Ph.D

Ann Nutr Metab. 2007;51(5):421-7.

Validation of ultrasound techniques applied to body fat measurement. A

comparison between ultrasound techniques, air displacement plethysmography

and bioelectrical impedance vs. dual-energy X-ray absorptiometry.

Pineau JC, Guihard-Costa AM, Bocquet M.

Dynamique de l'évolution humaine UPR 2147 CNRS, Paris, France.

pineau@...

AIMS: To evaluate the accuracy of body fat percentage (BF%) estimates from a

portable, non-traumatizing ultrasound device with high accuracy and

reliability compared to dual-energy X-ray absorptiometry (DEXA), the

reference technique. DESIGN: Cross-validation between ultrasound technique

(UT), DEXA, air displacement plethysmography (ADP) and bioelectrical

impedance (BIA) was developed in the study. SUBJECTS: A total of 89 healthy

subjects (41 women, 48 men), aged 48.4 +/- 17.7 (mean +/- SD), with Body

mass index (28.5 +/- 7.7 kg/m(2)) and body fat DEXA (29.6 +/- 10.8 kg)

participated. METHODS: BF% was measured using an UT associated with

anthropometric parameters and simultaneously, with the DEXA reference

technique, BIA and ADP. RESULTS: UT estimates of BF% were better correlated

with those of DEXA in both males and females (r = 0.98, SEE = 2.0) than with

ADP (r = 0.94, SEE = 3.7) or BIA (r = 0.92, SEE = 4.4). The UT in both

genders was better (TE = 1.0) than BIA (TE = 2.6) and ADP (TE = 3.0). The

95% limits of agreement were also better for the UT (-2%; 2%) than with BIA

(-5.1%; 4.9%) and ADP (-6.3%; 5.3%). CONCLUSIONS: The limits of agreement

with BIA and ADP are unacceptably high compared to a DEXA measure criterion.

The use of a new portable device based on a UT produced a very accurate BF%

estimate in relation to the DEXA reference technique.

[Guest guest]

Hello Sharon,

For the moment, it's a prototype but very soon, it will be on the market.

I saw how they use it : you put the probe (I don't know if it's the right

word in english) at 4 points (2 on the right side, 2 on the left) : in the

middle of the thighs (quadriceps femoris muscle) and in the back (on the

quadratus lumborum muscle). It takes about 5 minutes. It seems to be easy.

I'll give you more informations as I get some.

Have a nice day.

--

Frederic Courtois, RD, Ph.D

Re: Ultrasound techniques to body fat measurement

Frederic,

How expensive is this device and how much training is required to use it?

Sharon Staier, MS, RD

Family and Sports Nutrition

Cape Cod, MA

USA

[Guest guest]

Hello Sharon,

For the moment, it's a prototype but very soon, it will be on the market.

I saw how they use it : you put the probe (I don't know if it's the right

word in english) at 4 points (2 on the right side, 2 on the left) : in the

middle of the thighs (quadriceps femoris muscle) and in the back (on the

quadratus lumborum muscle). It takes about 5 minutes. It seems to be easy.

I'll give you more informations as I get some.

Have a nice day.

--

Frederic Courtois, RD, Ph.D

Re: Ultrasound techniques to body fat measurement

Frederic,

How expensive is this device and how much training is required to use it?

Sharon Staier, MS, RD

Family and Sports Nutrition

Cape Cod, MA

USA

[Guest guest]

> What are the differences and advantages as compared to BIA?

thanks

Marg Alfieri

>

> Date: 2008/01/13 Sun PM 12:31:20 EST

> To: <rd-usa >

> Subject: Re: Ultrasound techniques to body fat

measurement

>

> Hello Sharon,

> For the moment, it's a prototype but very soon, it will be on the

market.

> I saw how they use it : you put the probe (I don't know if it's the

right

> word in english) at 4 points (2 on the right side, 2 on the left) :

in the

> middle of the thighs (quadriceps femoris muscle) and in the

back (on the

> quadratus lumborum muscle). It takes about 5 minutes. It seems

to be easy.

> I'll give you more informations as I get some.

> Have a nice day.

> --

> Frederic Courtois, RD, Ph.D

>

> Re: Ultrasound techniques to body fat

measurement

>

>

> Frederic,

> How expensive is this device and how much training is required

to use it?

> Sharon Staier, MS, RD

> Family and Sports Nutrition

> Cape Cod, MA

> USA

>

>

>

[Guest guest]

Hello Marg,

Ultrasound are more precise (as the articles says in its conclusion) and

less harmfull than BIA (BIA uses electricity and it is inadvisable for

pregnant women). Gynaecologists use ultrasound for pregnant women.

Have a nice day.

--

Frederic Courtois, RD, PhD.

Re: Re: Ultrasound techniques to body fat measurement

>

>> What are the differences and advantages as compared to BIA?

>

> thanks

> Marg Alfieri