![background image](http://html1.mh-extra.com/html/thermofisher-scientific/dxr-xi/dxr-xi_user-manual_1105625144.webp)
3
OMNICxi Software Operation
Acquire and Analyze Data
138
DXRxi User Guide
Thermo Scientific
Peak Width Profile Settings
The Peak Width profile shows the width of the specified peak for each sample point in the
chemical image. The measurement is based on the full width of the peak at the specified
height. The colors in the chemical image represent the relative width of the specified peak at
each sample point. A higher intensity value (closer to the top of the profile intensity scale)
indicates a wider peak.
Figure 82.
Peak width profile settings
Table 30.
Peak height ratio profile settings
Profile Type
Description
Intensity
threshold
Specify a peak height ratio value below which will be reported as 0 (to
eliminate peaks below a certain size). This prevents dividing a small peak
(or noise spike) by an even smaller peak (or noise spike), which generates
a high response even when the peak of interest is not present in the
spectra.
Numerator/
Denominator
To define the heights of the numerator and denominator peaks, select
Numerator
(or
Denominator
) and then specify the following:
•
Position
. Defines the location of the numerator or denominator
peak. To specify the peak location, select the
Spectrum tool
,
then click a point of interest in the chemical image. The spectrum
collected at that location is displayed in the spectral pane. Enter the
X-axis location in the Position box or drag the double triangle tool in
the spectral pane to mark the peak position.
•
Baseline start/end
. Defines baseline values for the specified peak.
Enter X-axis locations in the
Baseline start
and
Baseline end
boxes
or drag the downward facing triangle tools in the spectral pane to
mark the baseline points.
Tip
To zoom the spectrum, use the mouse to draw a box around the
region, then click inside the box.
Summary of Contents for DXR xi
Page 12: ...1 Introducing the DXRxi Raman Imaging System Trademarks 6 DXRxi User Guide Thermo Scientific...
Page 14: ...2 DXRxi Microscope Operation 8 DXRxi User Guide Thermo Scientific...
Page 64: ...Safety Information 58 DXRxi User Guide Thermo Scientific Microscope Safety Labels or...
Page 65: ...Safety Information Thermo Scientific DXRxi User Guide 59...
Page 66: ...Safety Information 60 DXRxi User Guide Thermo Scientific...
Page 67: ...Safety Information Thermo Scientific DXRxi User Guide 61...
Page 68: ...Safety Information 62 DXRxi User Guide Thermo Scientific...
Page 166: ...3 OMNICxi Software Operation Acquire and Analyze Data 160 DXRxi User Guide Thermo Scientific...