Perhaps you should try some spelling variations:
information perfusion » information fusion, information diffusion, information profession
perfusion methods » fusion methods, permutation methods, regression methods
array formulas » area formulas, harrop formulas, array formats
array imaging » arrays imaging, airway imaging, ray imaging
methods some » method some, methods soe, methods sam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: information perfusion methods some ((((array formulas) OR (array format))) OR (array imaging))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "information perfusion methods some ((((array formulas) OR (array format))) OR (array imaging))".
• Adding a wildcard symbol may retrieve word variants: information perfusion methods some ((((array formulas) OR (array format))) OR (array imaging))*.