Vázquez D, Subirán B, Pujol M, Estévez A, Nart L, Hecht P

Language: Spanish
References: 10
Page: 204-208
PDF size: 225.58 Kb.

ABSTRACT

Objective: to diminish the artifact effect generated by high density objects by using filters of different materials and thickness, located in strategic places of the tomograph. Material and methods: aluminum and copper filters located in strategic places in the tomographic equipment were used. Oblique cuts were made on dental pieces with metal restorations and implants; the extension of the artifact in width and height was measured in each tomographic acquisition. Results: significant differences were found regarding the decrease of the dispersion according to each filter with respect to the non-use of these elements. Conclusion: the use of filters achieves to diminish the artifact effect in structures of high density, obtaining a better image quality for the diagnosis, allowing the software to reconstruct a real image.

REFERENCES

1. Sartori P, Rozowykniat M, Sivieroc L, Barba G, Pena A, Mayol N et al. Artefactos y artificios frecuentes en tomografía computada y resonancia magnética. Rev Argent Radiol. 2015; 79 (4): 192-204.

2. Stadler A, Schima W, Ba-Ssalamah A, Kettenbach J, Eisenhuber E. Artifacts in body MR imaging: their appearance and how to eliminate them. Eur Radiol. 2007; 17 (5): 1242-1255.

3. Al-Shakhrah I, Al-Obaidi T Common artifacts in computerized tomography: a review. Appl Radiol. 2003; 32: 25-32.

4. Boas FE, Fleischmann D. CT artifacts: causes and reduction techniques. J Med Imaging. 2012; 4 (2): 229-240.

5. Lisanti C, Carlin C, Banks KP, Wang D. Normal MRI appearance and motion-related phenomena of CSF. AJR Am J Roentgenol. 2007; 188 (3): 716-725.

6. Zhuo J, Gullapalli RP. AAPM/RSNA physics tutorial for residents: MR artifacts, safety, and quality control. Radiographics. 2006; 26 (1): 275-297.

7. Barbieri Petrelli G, Flores Guillén J, Escribano Bermejo M, Discepoli N. Actualización en radiología dental: Radiología convencional Vs digital. Av Odontoestomatol. 2006; 22 (2): 131-139.

8. Wenzel A, Kirkevang LL. High resolution charge-coupled device sensor vs. medium resolution photostimulable phosphor plate digital receptors for detection of root fractures in vitro. Dent Traumatol. 2005; 21 (1): 32-36.

9. Zhang X, Wang J, Xing L. Metal artifact reduction in x-ray computed tomography (CT) by constrained optimization. Med Phys. 2011; 38 (2): 701-711.

10. Berkhout WE, Beuger DA, Sanderink GC, van der Stelt PF. The dynamic range of digital radiographic systems: dose reduction or risk of overexposure? Dentomaxillofac Radiol. 2004; 33 (1): 1-5.