Perfusion deficits and functional connectivity alterations in patients with post-traumatic stress disorder

Yang Liu; Baojuan Li; Xi Zhang; Linchuan Zhang; Liang Li; Hongbing Lu

doi:10.1117/12.2208792

29 March 2016 Perfusion deficits and functional connectivity alterations in patients with post-traumatic stress disorder

Yang Liu, Baojuan Li, Xi Zhang, Linchuan Zhang, Liang Li, Hongbing Lu

Author Affiliations +

Proceedings Volume 9788, Medical Imaging 2016: Biomedical Applications in Molecular, Structural, and Functional Imaging; 97881C (2016) https://doi.org/10.1117/12.2208792
Event: SPIE Medical Imaging, 2016, San Diego, California, United States

Abstract

To explore the alteration in cerebral blood flow (CBF) and functional connectivity between survivors with recent onset post-traumatic stress disorder (PTSD) and without PTSD, survived from the same coal mine flood disaster. In this study, a processing pipeline using arterial spin labeling (ASL) sequence was proposed. Considering low spatial resolution of ASL sequence, a linear regression method was firstly used to correct the partial volume (PV) effect for better CBF estimation. Then the alterations of CBF between two groups were analyzed using both uncorrected and PV-corrected CBF maps. Based on altered CBF regions detected from the CBF analysis as seed regions, the functional connectivity abnormities in PTSD patients was investigated. The CBF analysis using PV-corrected maps indicates CBF deficits in the bilateral frontal lobe, right superior frontal gyrus and right corpus callosum of PTSD patients, while only right corpus callosum was identified in uncorrected CBF analysis. Furthermore, the regional CBF of the right superior frontal gyrus exhibits significantly negative correlation with the symptom severity in PTSD patients. The resting-state functional connectivity indicates increased connectivity between left frontal lobe and right parietal lobe. These results indicate that PV-corrected CBF exhibits more subtle perfusion changes and may benefit further perfusion and connectivity analysis. The symptom-specific perfusion deficits and aberrant connectivity in above memory-related regions may be putative biomarkers for recent onset PTSD induced by a single prolonged trauma exposure and help predict the severity of PTSD.

Citation Download Citation

Yang Liu, Baojuan Li, Xi Zhang, Linchuan Zhang, Liang Li, and Hongbing Lu "Perfusion deficits and functional connectivity alterations in patients with post-traumatic stress disorder", Proc. SPIE 9788, Medical Imaging 2016: Biomedical Applications in Molecular, Structural, and Functional Imaging, 97881C (29 March 2016); https://doi.org/10.1117/12.2208792

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KEYWORDS

Statistical analysis

Image segmentation

Biological research

Floods

Mining

Magnetic resonance imaging

Signal to noise ratio

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