《k-space tutorial》.pdf

Availableonlineat/2008/1/e15 doi:10.2349/biij.4.1.e15 biij BiomedicalImagingandInterventionJournal TUTORIAL kSpacetutorial:anMRIeducationaltoolforabetter understandingofkspace *,1 2 3,4 5 DMoratal ,PhD,AVallésLuch ,MSc,LMartíBonmatí ,MD,PhD,MEBrummer ,PhD 1 Electronics Engineering Department, Universitat Politècnica de València, Valencia, Spain 2 Applied Thermodynamics Department, Universitat Politècnica de València, Valencia, Spain 3 Radiology Department, Hospital Universitari Dr. Peset, Valencia, Spain 4 Radiology Department, Hospital Quirón, Valencia, Spain 5 Pediatrics and Radiology Departments, Emory University School of Medicine, Atlanta, Georgia, United States of America Received8January2008;receivedinrevisedform2 1February2008;a epted10March2008 ABSTRACT AmaindifferencebetweenMagneticResonance(MR)imagingandothermedicalimagingmodalitiesisthecontrol overthedataacquisitionandhowitcanbemanagedtofinallyshowtheadequatereconstructedimage.Withsomebasic programmingadjustments,theusercanmodifythespatialresolution,fieldofview(FOV),imagecontrast,acquisition velocity,artifactsandsomanyotherparametersthat willcontributetoformthefinalimage.Themaincharacterand agentofallthiscontroliscalledkspace,whichrepresentsthematrixwheretheMRdatawillbestoredpreviouslytoa Fouriertransformationtoobtainthedesiredimage. ThisworkintroduceskSpacetutorial,aMATLABbasededucationalenvironmenttolearnhowtheimageandthe kspacearerelated,andhow theimagecanbeaffectedthrough kspace modifications.ThisMRimagingeducational environment has learn