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Drawing time-density curve with Fiji/ImageJ: An alternative approach for parametric coding of cerebral digital
Zhongyu Zhao1, Wenzhao Liang2, Bingyang Zhao1
1China-Japan Union Hospital of Jilin University, Department of Neurology, China.
Background:
Quantitative spatiotemporal analysis of digital subtraction angiography could support clinical decision making for the management of cerebral vascular disease. However, there is a lack of free and user-friendly applications. The objective of our study is to devise a free and simple solution for parametric coding of digital subtraction angiography.
New Method:
By driving the time-density curves in the region of interest, the digital subtraction angiography images were color-coded and quantitatively analyzed using fully open-source and free software (Fiji/ImageJ). The similarity factor (f2) was used to compare the resolution profiles between time-density curves generated with commercial software on the Siemens workstation (syngo iFlow, Siemens Healthcare, Berlin, Germany) and our method.
Results And Comparison With Existing Method:
Sixteen patients diagnosed with acute ischemic stroke resulting from acute occlusion of the distal internal carotid artery or the first segment of the middle cerebral artery were selected for analysis. Angiography images were successfully processed with syngo iFlow and Fiji/ImageJ. The images processed with Fiji/ImageJ provided excellent anatomic and hemodynamic details. In all patients, the similarity factor (f2) values of the time-density curves derived from the same region of interest were 99.90 (range 99.85-99.95).
Conclusions:
The ImageJ/Fiji software provides a user-friendly and free alternative for parametric coding of digital subtraction angiography.
