Sellar area tumors such as pituitary adenoma, craniopharyngioma and meningioma, etc, commonly lead to visual impairment symptoms. Patients suffer from a loss of visual acuity (VA) and visual field defects (VF) due to a local compression on the optic chiasma by the tumor. In the management of these patients, it is an important goal to evaluate their visual function throughout the treatment, so as to predict the outcome of the visual function . Since the visual pathway contains a huge complex network of both structure and function, traditional simplex evaluation of VA and VF is obviously not enough. Former studies have revealed changes in the visual network and cortex structure in neurodegenerative diseases and optic neuritis, yet the functional and structural changes caused by local tumor compression and their relation to the visual cortex activity patterns needs further research. The objective of this research is to asses the visual function in patients with sellar area tumor 1 week preoperatively (baseline),72 hours postoperatively(checking point 1) and at 3 months follow up(checkpoint 2). By using multimodal evaluation including visual resting and task state fMRI, diffusion tensor imaging (DTI), etc. The investigators aim to reveal the changes in functional connectivity (FC), amplitude of low frequency fluctuation (ALFF), regional homogeneity (REHO) ,visual cortex activity patterns and tract-based spatial statistics (TBSS).
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Change on functional connectivity of visual resting network
Timeframe: Change from baseline (1 week preoperative) functional connectivity of visual resting network at 3 days postoperative and 3 moths postoperative.
Change on signal strength of the visual cortex activation by visual tasking state fMRI (visual BOLD fMRI).
Timeframe: Change from baseline (1 week preoperative) visual cortex activation signal strength at 3 days postoperative and 3 moths postoperative.
Change on anatomical Connectivity of the posterior visual pathway
Timeframe: Change from baseline (1 week preoperative) TBSS result at 3 days postoperative and 3 moths postoperative.