Summary
Samenvatting Abdomen I
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Hanzehogeschool MBRT jaar 1 Thema 11 Abdomen I.
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By: russomsalem • 3 year ago
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FamkeL
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THEMA 11 ABDOMEN IT11 RT ME berekeningen II
Terugblik ME I (bestraling op FHA 100 cm)
• Bestraling isocentrisch
Isocentrische bestraling
- Het draaipunt ligt in het midden van de patiënt
• Wat is de Mayneordfactor?
- Correctiefactor voor bestralingen op niet standaard FHA (=100cm)
• Waar/wat moet er gecorrigeerd worden?
- PDD tabel (FHA 100 cm)
- Invloed op het dosistempo door ‘andere’ FHA
• Hiermee wordt gecorrigeerd met behulp van de ‘kwadratenwet’
Veldgrootte correctiefactor is voor hoeveelheid strooistraling
,Voorbeeld
• Een patiënt wordt planparallel bestraald op het rechter os ilium (darmbeen)
Gegevens
• Veldgrootte 22 cm x 22 cm
• FHA = 90 cm; FHA = 100 cm
• Doorsnede patiënt t.p.v bundelassen: 20 cm
• Versnelspanning 6 MV
• Dosering
- 50 Gy in fracties van 2 Gy op de midline
• Gewichtsfactor AP = 1, PA = 1
,Mayneordfactor
, T11 PI Window with & window level
WW/WL WL
Hersenen
Longen 1400/-400
Mediastinum 350/50
Abdomen
Bot 2000/250
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