| Abstract [eng] |
Magnetic resonance imaging (MRI), computed tomography (CT) and ultrasonography/ultrasound (US) are sophisticated diagnostic modalities that are utilized in medical imaging in diagnostical field. Unfortunately, all materials react differently and uniquely to the physics behind the MRI, CT and US modalities. As a result, negative effect such as artifact creation occur, which leads to uninterpretable medical images in specific areas of interest. In order to know how big of an area will be covered up by artifact induced medical implants, 3D Slicer and Image J applications will be used with thresholding, contouring technique and contrast to noise ratio calculation to be able to assess the artifact affected volume, area and effect on the image interpretability. This method was used on five samples, stainless steel, aluminium metal, dental implant material of Zr series Katana Zirconia STML. Dental filling of K series ENAMEL plus HRi biofunction (MICERIUM S.p.A, Italy). Dental implant material of E-max series Ivoclar Vivadent IPS E.max press, which are the most popular materials for head and neck region medical implants, while scanning with three different medical imaging modalities (MRI, CT and US). The results have shown that the biggest artifact voulme was observed in CBCT kV imaging with water, with values ranging from 3344.54 mm3 to 16720.87 mm3, and the smallest artifact volume was detected in CBCT MV imaging without water, with ranges from 301.115 mm3 to 1074.75 mm3. Stainless steel sample has proved to be the most artifacting medical material, with volume values ranging from 1074.75 mm3 to 25493.33 mm3 across modalities, whereas K sample has shown the least amount of artifacting, with values from 266.79 mm3 to 6855.21 mm 3 across imaging modalities. |
