Radioprotection in mobile x-ray examinations

This poster is published under an open license. Please read the disclaimer for further details.

Congress:

ECR 2016

Poster Number:

B-1251

Type:

Scientific Paper

Keywords:

Radioprotection / Radiation dose, Professional issues, Radiation physics, Digital radiography, Radiation safety, Technical aspects, Dosimetry, Occupational / Environmental hazards, Education and training

Authors:

A. F. Abrantes, C. Rebelo, P. Sousa, S. Rodrigues, R. P. P. Almeida, J. P. Pinheiro, K. B. Azevedo, L. P. V. Ribeiro; Faro/PT

DOI:

10.1594/ecr2016/B-1251

DOI-Link:

https://dx.doi.org/10.1594/ecr2016/B-1251

Fig. 1: Variation of scattered radiation in relation to tube voltage for configuration...

Fig. 2: Variation of the scattered radiation in relation to current-time product for...

Fig. 3: Isodose curves in two dimensions to the height of the entry of the skin for the...

Fig. 4: Variation of scattered radiation in relation to the height of the exposed...

Purpose

Quantify scatter radiation exposure on patients and staff during mobile x-ray examinations to patients

Methods and materials

This is a quantitative correlational study. The population consists of non-transportable patients admittedat a large public hospital with a sample of 199 x-rays performed. A full body phantom was used to quantify scatter radiation. Three configurations were used: anteroposterior (AP) incidence of the chest, with the phantom in the supine position and semi-sitting, and the tangential abdomen. The AP incidence of chest in the supine position (configuration 1), the phantom was positioned in the supine position under the litter, the image plate (IP) under the...

Results

Scattered radiation in function of voltage Thechange between 77 and 81 kVp may be due the transition betweenthe Compton effect and photoelectric effect. Voltage and exposure were correlated and linear regression analysis confirmed that theradiationsecondary is directly proportional to the voltage(R = 0.9994) (Figure 1). Scattered radiation in function of the current-time product The variation of the scattered radiation is similar for both configurationsbecause itincreases with the increase of the current-time product (Figure 2). The correlation between the scattered radiation and the current-time product showed...

Conclusion

Mobile x-rays on patients do not breachdose limits established by the national law, provided that the individuals stay more than 1 m away from the center of the exposure field and measures of radiological protection are applied.

Personal information

References

ACR. ACR–SPR practice guideline for the performance of pediatric and adult portable (mobile unit) chest radiography. USA: ACR; 2011. Lima JJP. Técnicas de diagnóstico com raios X: aspectos físicos e biofísicos. 2ª Edição. Coimbra: Imprensa da Universidade de Coimbra; 2009. Bushong SC. Manual de radiología para técnicos: física, biología y protección radiológica. 6ª Edição. Madrid: Harcourt; 1999. Evans SA, Harris L, Lawinski CP, Hendra IR. Mobile and portable radiography overview. 1999 [acedido em 2012 dezembro 2]. Disponível em: http://www.e-radiography.net/nickspdf/MOBILE%20EQUIPMENT.PDF Siemens Medical Solutions. Mobilett XP, mobilett...