tic_wir

This function returns the wash in rate from time-intensity curve data. Raw data
is smoothed using a loess smoother. Wash in rate is calculated as the maximum upward
slope of the loess curve before peak intensity is reached. It is recommended that
plotresult is set to TRUE in the first instance to visually confirm the analysis.

Plots and analyzes time-intensity curve data, such as data from
(contrast-enhanced) ultrasound. Values such as peak intensity, time to
peak, area under the curve, wash in rate and wash out rate are calculated.

Samuel Tingle

tican

Plot and Analyse Time-Intensity Data

tic_wir function

<dl><dt>data</dt>
<dd>A dataframe with time and intensity values as columns.</dd>
<dt>timevar</dt>
<dd>A character string (in quotes) with the dataframe column name for the time variable.</dd>
<dt>intensityvar</dt>
<dd>A character string (in quotes) with dataframe column name for the intensity variable.</dd>
<dt>loess.span</dt>
<dd>A number between 0 and 1, with larger values resulting in a smoother curve.</dd>
<dt>plotresult</dt>
<dd>TRUE or FALSE to determine whether a plot of the results is generated.</dd>
<dt>...</dt>
<dd>Additional arguments to be passed into the loess() function.</dd></dl>

Arguments

Return wash in rate from time-intensity data — tic_wir

<dl>

<dt>data</dt>
<dd>A dataframe with time and intensity values as columns.</dd>


<dt>timevar</dt>
<dd>A character string (in quotes) with the dataframe column name for the time variable.</dd>


<dt>intensityvar</dt>
<dd>A character string (in quotes) with dataframe column name for the intensity variable.</dd>


<dt>loess.span</dt>
<dd>A number between 0 and 1, with larger values resulting in a smoother curve.</dd>


<dt>plotresult</dt>
<dd>TRUE or FALSE to determine whether a plot of the results is generated.</dd>


<dt>...</dt>
<dd>Additional arguments to be passed into the loess() function.</dd>

</dl>

tic_wir: Return wash in rate from time-intensity data

Description

Usage

Value

Arguments

Examples