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Analysis of deep inferior epigastric perforator (DIEP) arteries by using MDCTA: Comparison between 2 post-processing
Luca Saba1, Matteo Atzeni, Diego Ribuffo
1Department of Radiology, Azienda Ospedaliero Universitaria, di Cagliari - Polo di Monserrato, s.s. 554 Monserrato, Cagliari 09045, Italy. lucasaba@tiscali.it
Purpose:
Our purpose was to compare two post-processing techniques, Maximum-Intensity-Projection (MIP) and Volume Rendering (VR) for the study of perforator arteries.
Methods:
Thirty patients who underwent Multi-Detector-Row CT Angiography (MDCTA) between February 2010 and May 2010 were retrospectively analyzed. For each patient and for each reconstruction method, the image quality was evaluated and the inter- and intra-observer agreement was calculated according to the Cohen statistics. The Hounsfield Unit (HU) value in the common femoral artery was quantified and the correlation (Pearson Statistic) between image quality and HU value was explored.
Results:
The Pearson r between the right and left common femoral artery was excellent (r=0.955). The highest image quality score was obtained using MIP for both observers (total value 75, with a mean value 2.67 for observer 1 and total value of 79 and a mean value of 2.82 for observer 2). The highest agreement between the two observers was detected using the MIP protocol with a Cohen kappa value of 0.856. The ROC area under the curve (Az) for the VR is 0.786 (0.086 SD; p value=0.0009) whereas the ROC area under the curve (Az) for the MIP is 0.0928 (0.051 SD; p value=0.0001).
Conclusion:
MIP showed the optimal inter- and intra-observer agreement and the highest quality scores and therefore should be used as post-processing techniques in the analysis of perforating arteries.
Insights
Maximum-Intensity-Projection (MIP) offers superior image quality and inter-observer agreement for analyzing perforator arteries compared to Volume Rendering (VR). MIP is recommended for optimal diagnostic accuracy in CT angiography studies of perforating vessels.
Area of Science:
- Radiology
- Medical Imaging
- Vascular Imaging
Background:
- Perforator arteries are crucial for tissue viability.
- Accurate visualization of perforator arteries is essential for surgical planning.
- Multi-Detector-Row CT Angiography (MDCTA) is a key imaging modality.
Purpose of the Study:
- To compare Maximum-Intensity-Projection (MIP) and Volume Rendering (VR) post-processing techniques.
- To evaluate their efficacy in the study of perforator arteries using MDCTA.
Main Methods:
- Retrospective analysis of 30 patients undergoing MDCTA.
- Image quality assessment and inter-/intra-observer agreement calculation (Cohen statistics).
- Quantification of Hounsfield Unit (HU) values and correlation with image quality (Pearson Statistic).
Main Results:
- MIP achieved the highest image quality scores and optimal inter-observer agreement (Cohen kappa = 0.856).
- Excellent correlation (r=0.955) was found between right and left common femoral arteries.
- MIP demonstrated superior performance over VR in ROC analysis (Az for MIP vs VR).
Conclusions:
- MIP is the preferred post-processing technique for analyzing perforator arteries.
- MIP provides superior inter- and intra-observer agreement and image quality.
- This technique enhances diagnostic accuracy in MDCTA studies of perforating vessels.
