Interventional procedures for biliary drainage with bilioplasty in pediatric patients: dosimetric aspects.
Radiol Med
; 113(3): 429-38, 2008 Apr.
Article
en En, It
| MEDLINE
| ID: mdl-18493778
ABSTRACT
PURPOSE:
This study was undertaken to evaluate patient dose in paediatric liver transplant recipients treated by percutaneous biliary drainage and bilioplasty procedures. MATERIALS ANDMETHODS:
Effective dose rates and entrance skin-dose (ESD) rates per minute of fluoroscopy were measured by using a plexiglas phantom (thickness 10 cm) simulating the patient and by varying the exposure parameters (type of pulsed fluoroscopy, image intensifier diameter, presence of diaphragms) to identify the technique delivering the lowest patient dose. In vivo measurements were performed during three interventional procedures.RESULTS:
The effective dose rate proved to be lowest for a particular type of pulsed fluoroscopy, with maximum magnification and with field-limiting diaphragms. The in vivo measurements showed a maximum ESD value of around 50 MGY (the threshold for transient erythema is 2,000 MGY, ICRP 60). The effective dose values were in the range of 0.9-1.5 MSV.CONCLUSIONS:
We established exposure parameters providing the desired image quality with the lowest dose for the equipment used and for a specific type of interventional procedure. The measured ESD values allow us to exclude the risk of deterministic effects on the skin. The effective dose values and considerations regarding the likelihood of radiation-induced cancer led to the conclusion that the radiological risk for the patient is largely justified by the benefits of these kinds of procedure.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedades de los Conductos Biliares
/
Conductos Biliares
/
Procedimientos Quirúrgicos del Sistema Biliar
/
Drenaje
/
Trasplante de Hígado
Tipo de estudio:
Etiology_studies
/
Observational_studies
/
Risk_factors_studies
Límite:
Child, preschool
/
Female
/
Humans
/
Infant
/
Male
Idioma:
En
/
It
Revista:
Radiol Med
Año:
2008
Tipo del documento:
Article
País de afiliación:
Italia