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Construction of a copper stepwedge with aluminum equivalent mean gray values
Dündar, Nesrin; Güneri, Pelin; Önem, Erinç; Boyacioğlu, Hayal.
  • Dündar, Nesrin; Ege University. Faculty of Dentistry. Department of Oral Diagnosis and Oral Radiology. Bornova. TR
  • Güneri, Pelin; Ege University. Faculty of Dentistry. Department of Oral Diagnosis and Oral Radiology. Bornova. TR
  • Önem, Erinç; Ege University. Faculty of Dentistry. Department of Oral Diagnosis and Oral Radiology. Bornova. TR
  • Boyacioğlu, Hayal; Ege University. Faculty of Dentistry. Department of Statistics. Bornova. TR
J. appl. oral sci ; 18(4): 390-396, July-Aug. 2010. ilus, graf, tab
Artículo en Inglés | LILACS | ID: lil-557110
ABSTRACT

OBJECTIVES:

To produce a copper (Cu) stepwedge with aluminum (Al) equivalent mean gray values (MGV). MATERIAL AND

METHODS:

The thicknesses of Cu steps that were equivalent to those of the Al were formulated using the X-ray attenuation properties of the materials. The Al and fabricated Cu stepwedges were radiographed, but the MGVs of the Cu stepwedge were mismatching to those of the Al. Using a mathematical function to adjust the pixel MGV of Cu stepwedge to those of the Al, new Cu stepwedges were created. In vitro iterations were performed until best approximation to Al was reached.

RESULTS:

The MGV of the Cu stepwedges fabricated by formularization were different than those of Al (p=0.001). Iteration method led to MGV similar to those of the Al stepwedge (p=0.207).

CONCLUSIONS:

Construction of a Cu stepwedge according to the basic rules of radiophysic failed to result in a stepwedge with similar radiodensity values to those of Al stepwedge. Further studies may use the formularization method only for prototype Cu wedge production, but consecutive iterations shall be compassed to obtain the best approximation to Al MGV.
Asunto(s)

Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Radiografía Panorámica / Absorciometría de Fotón / Cobre / Aluminio Límite: Humanos Idioma: Inglés Revista: J. appl. oral sci Asunto de la revista: Odontología Año: 2010 Tipo del documento: Artículo País de afiliación: Turquía Institución/País de afiliación: Ege University/TR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Radiografía Panorámica / Absorciometría de Fotón / Cobre / Aluminio Límite: Humanos Idioma: Inglés Revista: J. appl. oral sci Asunto de la revista: Odontología Año: 2010 Tipo del documento: Artículo País de afiliación: Turquía Institución/País de afiliación: Ege University/TR