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A Study on Maximum Skin Dose in Cerebral Embolization Procedures

L. D’Ercolea, L. Mantovania, F. Zappoli Thyrionb, M. Bocchiolaa, A. Azzarettib, F. Di Mariab, C. Massa Saluzzob, P. Quarettib, G. Rodolicob, P. Scagnellib and L. Andreuccia

a Department of Medical Physics, Istituto di Ricovero e Cura a Carattere Scientifico, San Matteo Hospital, Pavia, Italy
b Department of Radiology, Istituto di Ricovero e Cura a Carattere Scientifico, San Matteo Hospital, Pavia, Italy


Figure 1
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  		Fig 1. Dose/image versus PMMA phantom thickness curves for angiographic unit 1.


Figure 2
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  		Fig 2. Dose/image versus PMMA phantom thickness curves for angiographic unit 2.


Figure 3
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  		Fig 3. Position of the Gafchromic XR type R film and an example of a film after exposure.


Figure 4
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  		Fig 4. Calibration curves for 2 different batches of Gafchromic XR type R films.


Figure 5
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  		Fig 5. Correlation between fluoroscopy time and maximum skin dose (MSD) measured by radiochromic films on the skull in the 21 procedures.


Figure 6
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  		Fig 6. Correlation between total dose-area product (DAP) and maximum skin dose (MSD) measured by radiochromic films on the skull in the 21 procedures.


Figure 7
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  		Fig 7. Histogram of maximum skin dose calculated for 27 instances of embolization of cerebral aneurysms.


Figure 8
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  		Fig 8. Sacciform aneurysm of the right carotid siphon (A) excluded with a spiral Guglielmi detachable coil (GDC) (B).


Figure 9
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  		Fig 9. Aneurysms of the right carotid siphon (A) and the basilar artery embolized during the same session (B).





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X