suv: Calculating the Lean Body Mass
In oro.pet: Rigorous - Positron Emission Tomography

leanBodyMass

R Documentation

Calculating the Lean Body Mass

Description

The lean body mass (LBM) is calculated according to the formula

1.1\cdot\mbox{weight}-128\cdot(\mbox{weight}/\mbox{height})^2

if male and

1.07\cdot\mbox{weight}-148\cdot(\mbox{weight}/\mbox{height})^2

if female.

The standard uptake value (SUV) is summarized using the hotspot method or by calculating total volume of the high values.

Usage

leanBodyMass(height, weight, gender)

hotSpotSUV(suv, radius = 10, type = "3D")

totalSUV(suv, mask, z, bg, local = TRUE)

Arguments

`height`	is a vector of heights in centimeters.
`weight`	is a vector of weights in kilograms.
`gender`	is a character vector (may be of length one) with the value “male” or “female”.
`suv`	is the standard uptake value (SUV).
`radius`	is the desired hotspot radius (units = voxels).
`type`	is a character string (acceptable values are `2D` or `3D`) that determines the dimension of the hot spot (default = `3D`).
`mask`	is a multidimensional array of logical values.
`z`	is the slice index.
`bg`	is the estimated background SUV.
`local`	is a logical value.

Value

Vector of lean body mass values in kilograms.

...

Author(s)

Brandon Whitcher bwhitcher@gmail.com

References

Sugawara, Y., K. R. Zasadny, A. W. Neuhoff, R. L. Wahl (1999) Reevaluation of the Standardized Uptake Value for FDG: Variations with Body Weight and Methods for Correction, Radiology 213: 521–525.

Examples

library(oro.pet)
n <- 11
h <- seq(200, 150, length=n)
w <- seq(80, 120, length=n)
cbind(h, w, leanBodyMass(h, w, "male"), leanBodyMass(h, w, "female"))

oro.pet documentation built on Aug. 20, 2022, 9:06 a.m.