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MRI samenvatting jaar 2 periode 1 alle benodigde theorie staat erin
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lOMoAR cPSD| 6918541Samenvatting MRI OP 2.1
2020/2021
MRI (Fontys)
Gedownload door awat taha (sivanismail123@gmail.com)
, lOMoAR cPSD| 6918541
StudeerSnel wordt niet gesponsord of ondersteund door een hogeschool of universiteit
Gedownload door awat taha (sivanismail123@gmail.com)
, lOMoAR cPSD| 6918541
OP2.1 MRI
Inhoudsopgave
2.1cMRI1 MRI-onderzoek en basisprincipes .................................................................................................... 3
MRI-onderzoek; Magnetic Resonance Imaging (MRI) .........................................................................................3
2.1kennisclip1MRI Systeemopbouw en beelden .............................................................................................. 5
MRI-onderzoek ....................................................................................................................................................5
Hardware MRI .....................................................................................................................................................6
De magneet .........................................................................................................................................................6
Ontvangstspoelen (coils) .....................................................................................................................................6
2.1kennisclip2MRI Basisveiligheid ................................................................................................................... 6
Veiligheidsaspecten omtrent de magneet ...........................................................................................................6
Veiligheidsaspecten omtrent de gradiënten .......................................................................................................7
Veiligheid omtrent de RF-pulsen .........................................................................................................................7
2.1 wMRI 1....................................................................................................................................................... 7
2.1kennisclip3 MRI Basisprincipes, excitatie en relaxatie ............................................................................... 10
Precessiebeweging ............................................................................................................................................10
Vectoren ............................................................................................................................................................10
2.1kennisclip 4: MRI: Spin Echo en weging ..................................................................................................... 11
Herhaling waterstofprotonen in magneetveld, excitatie, relaxatie ..................................................................11
Spin echo sequentie ...........................................................................................................................................12
Parameters (SE) sequentie: ...............................................................................................................................13
Weging ..............................................................................................................................................................14
Transversale relaxatie (T2) ................................................................................................................................14
De longitudinale relaxatie (T1) ..........................................................................................................................14
Contrast ............................................................................................................................................................14
2.2kennisclipMRI 5 Dataverzameling met gradiënten .................................................................................... 15
Gradiënten: .......................................................................................................................................................16
Codering ............................................................................................................................................................16
Slice codering ....................................................................................................................................................17
Fase codering ....................................................................................................................................................17
Frequentiecodering...........................................................................................................................................17
2.1kennisclip6 MRI K-ruimte ......................................................................................................................... 18
Ruwe data .........................................................................................................................................................18
2.1wMRI K-ruimte.......................................................................................................................................... 21
2.1zMRI anatomie cerebrum.......................................................................................................................... 22
Sagitaal .............................................................................................................................................................22
2.1zMRI6 Beeldherkenning LWK .................................................................................................................... 25
2.1pMRI2 MRI image expert, Spin Echo (SE) weging en beeldkwaliteit .......................................................... 27
2.1pMRI1 CT vs MRI ....................................................................................................................................... 28
2.1wMRi K-ruimte .......................................................................................................................................... 29
1
Gedownload door awat taha
(sivanismail123@gmail.com)
, lOMoAR cPSD| 6918541
OP2.1 MRI
2.1consult3 MRI ............................................................................................................................................. 29
2.1Kennisclip7 MRI Beeldkwaliteit CRAST ...................................................................................................... 29
Contrast .............................................................................................................................................................30
Spatiële resolutie ...............................................................................................................................................30
Signaal/ruis-verhouding (SNR) ..........................................................................................................................31
Scantijd ..............................................................................................................................................................31
Beeldkwaliteit ....................................................................................................................................................32
2.1 Werkcollege 4: CRAST .............................................................................................................................. 32
2
Gedownload door awat taha (sivanismail123@gmail.com)
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