Position and variation in the number of high-density objects influence the expression of volumetric alteration artifacts in cone-beam computed tomographic images
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Summary
This summary is machine-generated.The number and position of high-density objects impact volumetric alteration (VA) artifacts in cone-beam computed tomography (CBCT) images. Specifically, three objects reduced VA, while posterior positioning increased it.
Area Of Science
- Dental Imaging
- Radiology
- Medical Physics
Background
- Cone-beam computed tomography (CBCT) is widely used in dentistry.
- High-density objects can cause volumetric alteration (VA) artifacts in CBCT.
- Understanding factors influencing VA is crucial for accurate imaging.
Purpose Of The Study
- To investigate the effect of the number and position of high-density objects on VA artifacts in CBCT.
- To compare VA across different materials (cobalt-chromium, titanium, zirconium).
- To evaluate potential differences between two CBCT systems (OP300 Maxio and Eagle).
Main Methods
- Four cylinders of varying materials were placed in a phantom in 7 combinations.
- CBCT scans were acquired using two different systems.
- Volumetric alteration was calculated, and statistical analyses were performed.
Main Results
- Volumetric alteration (VA) was present under all conditions.
- The number of objects, their position (anterior/posterior), and material significantly influenced VA (P<0.05).
- Three objects reduced VA (P<0.05), posterior positioning increased it (P<0.05), and titanium showed the lowest VA (P<0.05).
Conclusions
- The presence of three high-density objects reduces VA in CBCT images.
- Object positioning in the posterior region generally increases measured volume.
- Material type, particularly titanium, influences the degree of VA.
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