Samenvatting MRI
Inhoud
Table of Contents
Rol van MRI............................................................................................................................................2
Afwijkingen te zien bij MRI, bijv..........................................................................................................2
Verschillende soorten magneten............................................................................................................2
Permanente magneet.........................................................................................................................2
Elektromagneet..................................................................................................................................3
Supergeleide magneet........................................................................................................................3
Hardware MRI........................................................................................................................................3
Soorten elektromagnetische velden...................................................................................................3
Statisch magneetveld.........................................................................................................................3
Schakelende gradiënten.....................................................................................................................4
Radiofrequentie velden......................................................................................................................4
Risico’s effecten patiënt.....................................................................................................................4
Contra indicaties.....................................................................................................................................4
Absolute contra indicatie....................................................................................................................4
Contra indicaties.................................................................................................................................4
Relatieve Contra indicaties.................................................................................................................4
Screening................................................................................................................................................5
Overzicht MRI.........................................................................................................................................5
Magneet.................................................................................................................................................5
Proton in magneetveld.......................................................................................................................5
Radiofrequentie puls..........................................................................................................................6
Soorten MRI afbeeldingen......................................................................................................................6
SNR.........................................................................................................................................................6
Doel MRI spoelen...............................................................................................................................6
Soorten ontvangstspoel..........................................................................................................................6
Volume spoel......................................................................................................................................7
Oppervlakte spoel..............................................................................................................................7
Intra-luminale-spoel...........................................................................................................................7
Multi element spoel...........................................................................................................................7
Overige spoelen..................................................................................................................................7
, Eerste MRI scan 3 Juli 1977
Rol van MRI
- Neuro
- Skelet spieren
- Abdomen
MRI beeld zacht weefsel goed af, gedetailleerder dan CT bij de hersenen.
Afwijkingen te zien bij MRI, bijv
- Tumoren
- Spier, kruisbanden
- Hernia
Verschillende soorten magneten
- Permanente magneet
- Elektro magneet
- Supergeleide magneet
Permanente magneet
- Zijn altijd actief
- Voordelen:
o Laag stroomgebruik
o Klein strooiveld
o Geen helium koeling nodig (helium is duur)
- Nadelen:
o Erg zwaar
o Beperkte veldsterkte (heeft te maken met sterkte MRI)
Inhoud
Table of Contents
Rol van MRI............................................................................................................................................2
Afwijkingen te zien bij MRI, bijv..........................................................................................................2
Verschillende soorten magneten............................................................................................................2
Permanente magneet.........................................................................................................................2
Elektromagneet..................................................................................................................................3
Supergeleide magneet........................................................................................................................3
Hardware MRI........................................................................................................................................3
Soorten elektromagnetische velden...................................................................................................3
Statisch magneetveld.........................................................................................................................3
Schakelende gradiënten.....................................................................................................................4
Radiofrequentie velden......................................................................................................................4
Risico’s effecten patiënt.....................................................................................................................4
Contra indicaties.....................................................................................................................................4
Absolute contra indicatie....................................................................................................................4
Contra indicaties.................................................................................................................................4
Relatieve Contra indicaties.................................................................................................................4
Screening................................................................................................................................................5
Overzicht MRI.........................................................................................................................................5
Magneet.................................................................................................................................................5
Proton in magneetveld.......................................................................................................................5
Radiofrequentie puls..........................................................................................................................6
Soorten MRI afbeeldingen......................................................................................................................6
SNR.........................................................................................................................................................6
Doel MRI spoelen...............................................................................................................................6
Soorten ontvangstspoel..........................................................................................................................6
Volume spoel......................................................................................................................................7
Oppervlakte spoel..............................................................................................................................7
Intra-luminale-spoel...........................................................................................................................7
Multi element spoel...........................................................................................................................7
Overige spoelen..................................................................................................................................7
, Eerste MRI scan 3 Juli 1977
Rol van MRI
- Neuro
- Skelet spieren
- Abdomen
MRI beeld zacht weefsel goed af, gedetailleerder dan CT bij de hersenen.
Afwijkingen te zien bij MRI, bijv
- Tumoren
- Spier, kruisbanden
- Hernia
Verschillende soorten magneten
- Permanente magneet
- Elektro magneet
- Supergeleide magneet
Permanente magneet
- Zijn altijd actief
- Voordelen:
o Laag stroomgebruik
o Klein strooiveld
o Geen helium koeling nodig (helium is duur)
- Nadelen:
o Erg zwaar
o Beperkte veldsterkte (heeft te maken met sterkte MRI)
