Purpose
The aim of the study was to compare data from emphysema quantifiing tools in Philips programme COPD and Siemens PULMO 3D according to spirometric and lung functional tests
Methods and Materials
We compared data from 25 COPD patients,
17 male and 8 female (average age 71).
We assessed data aquired by multidetector CT Siemens Definition AS+.
We used data made via spiral aquisition,
high resolution reconstructions with 1mm thickness of slices.
Spirometry and lung functional tests were performed maximally 400 days after or before computed tomography (CT),
average gap was 100 days.
The most important measurement was done on bodypletysmography.
The first used software was COPD aplication from Philips Electronics available on IntelliSpace Portal,
the second...
Results
Diference between the two tested softwares was only 16 %.
Pulmo 3D counted higher numbers of LAA ( figure1 ) The strongest correlation between functional tests and our measurement was at DLCO values [2.].
Corelation coeficient was 0,63 (figure 2 ) for Philips and 0,56 (figure 3.) for Siemens respectivelly.
There was not found any statistically significant diference.
Our measurements were done without any adjustment of automatically selected area of interest,
this could be the reason of diference between the two softwares.
Conclusions
We have found some diference between tested softwares.
However there was no statistical significance.
Both softwares are appropriate for practical use and serve as usefull tools in description and quantificaton of pulmonary emphysema.
References
Wang Z1 et al.
Optimal threshold in CT quantification of emphysema ; Eur Radiol.
2013 Apr;23(4):975-84
Nambu A et al.
Relationships between diffusing capacity for carbon monoxide (DLCO),
and quantitative computed tomography measurements and visual assessment for chronic obstructive pulmonary disease.
Eur J Radiol.
2015 May;84(5):980-5
