Podstata
Afyzický jev
Definice
Whentheoscillatingcircuitisinanon-idealstateandthereisresistance,theresistanceheatsupandbecomesadampedoscillation;Whenthereisanexternalperiodicelectromotiveforceintheoscillationcircuit,itwillbecomeaforcedoscillation;whenthefrequencyoftheexternalelectromotiveforceisthesameasthenaturalfrequencyωofthefreeoscillationofthecircuit,theamplitudereachesthemaximumvalue,whichiscalledelectromagneticresonance.
Vlastnosti
Whenthesystemisexcitedbytheoutsideandisforcedtovibrate,ifthefrequencyoftheexternalexcitationisclosetothesystemfrequency,theamplitudeoftheforcedvibrationmayreachaverylargevalue.Thisphenomenoniscalledresonance.Asystemhascountlessnaturalfrequencies,andweoftenstudylow-rangesystemfrequencies.
Electromagneticresonanceiselectromagneticresonancewhenthefrequencyofelectromagneticwaveisthesameasthenaturalfrequencyoftheoscillationcircuit
Lékařské aplikace
Magneticresonanceimaging(MRI),medicalimagingtechnology
Functionalmagneticresonanceimaging(fMRI),MRItechnologytomeasurebrainactivity
Magnetická rezonance Neurologie (MRN), MRItechnologie obraz nervu
CardiacMagneticResonanceImaging(CMR),MRItechnologytoassessthecardiovascularsystem
Magneticresonanceangiography(MRA),magneticresonanceimagingtechniqueimagebloodvessels
Magneticresonancecholangiopancreatography(MRCPexamination),MRItechnologyimagebiliarytractandpancreaticduct
EndorectalcoilMRIMRItechnology,imagetheareaaroundtherectum
DelayedGadoliniumEnhancedMagneticResonanceImagingCartilage(dGEMRIC)MagneticResonanceImagingTechnologyImageCartilage
MagneticResonanceElastography(AbsolutePen),MRItechnologytomeasuretissuestiffness
Interventionalmagneticresonanceimaging(Yes)UseMRItechnologytoguidemedicalinterventions
NMRspectroscopicimagingNMRResonancetechnology,collectingcellactivityandmetabolisminformation
Magneticresonancetherapy,proposingtheprincipleoftreatmentbasedonmagneticresonance
Spektroskopické aplikace
NMRspectroscopy,atechniquetodeterminethepropertiesofphotonsormolecules
Two-dimensionalnuclearmagneticresonancespectroscopy
Proteiny nukleární magnetické rezonanční spektroskopie
Carbohydratesofnuclearmagneticresonancespectroscopy
p>Nukleární magnetická krezonanční spektroskopie nukleových kyselin
Invivomagnetická rezonanční spektroskopie
Nukleární magnetickokrezonanční spektroskopie v pevné fázi
Triple-resonancenuclearmagneticresonancespectroscopy
NMR decoupling
NMR krystalografie
Electronicparamagneticresonancespectroscopy,technologyandunpairedelectroniclearningmaterials
Pulzní elektromagnetická paramagnetická rezonance
Mikroskopická aplikace
Magneticresonancemicroscope,nuclearmagneticresonancetechnologyisusedtothescaleof5-10cubicmicrons
Magneticresonanceforcemicroscope,nuclearmagneticresonanceimagingtechnologyisusedfornanometerandsmallerScale
Jiné použití
Resonantinductivecoupling,amethodoftransmittingpower
NMR kvantový počítač
Magnetická rezonance (žurnál)
MagneticResonanceMedicine,"
MagneticResonanceinChemistry,"
MagneticResonanceCenterInvestigationInKingstonuponHull,England
TheIrvingL.HahnInstituteforMagneticResonanceImaginginEssen,Germany
Understandingthephysicalphenomenaofmagneticresonance(quantummechanics)