The influence of hip replacement material to the Exposure Index and Dose Area Product

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The influence of hip replacement material to the Exposure Index and Dose Area Product

Journal Title: Inżynier i Fizyk Medyczny - Year 2014, Vol 3, Issue 4

Abstract

Osteoarthritis of hips is a very common and serious health problem among people over 65 years of age. In case of advanced disease, and after having exhausted the possibilities of conservative treatment, the surgery needs to be performed. The most common testing before and after implantation of the prosthesis is made by means of X-ray examination. Evaluation of total hip replacement requires a very good quality radiographs. According to the philosophy of optimizing, diagnostic radiology should strive to provide the highest diagnostic value at the lowest dose of radiation. The aim of the study was to analyze how different elements of the prosthesis affect the Exposure Index (EXI) and the dose expressed as a Dose Area Product (DAP). 108 radiographs were analyzed for titanium femoral stem with cobalt-chrome head, ceramic cup in a metal bowl and the whole prosthesis – by changing the anode voltage in the range of 70-93 kV and three different variants using the anti-scattered grid (without grid, f(o) = 115, f(o) = 180). EXI value measured respectively to the entire prosthesis, ceramic cup in a metal bowl and titanium femoral decreases along with the use of grid with a larger angle of lead strips (f(o) = 180). Type of material applied in individual elements of prosthesis affect the value of the DAP. DAP increases when prosthesis is exposed at a distance of 115 cm FFD and anti-scattered gird f(o) = 180 is used, instead of f(o) = 115.

Authors and Affiliations

Magdalena Czerżyńska, Ewa Pasieka, Sabina Jakubowska, Urszula Łebkowska

Keywords

hip prosthesis X-ray examination Dose Area Product Exposure Index anti-scattered gird

EP ID EP73739
DOI -
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