کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3170092 | 1199515 | 2006 | 6 صفحه PDF | دانلود رایگان |
PurposeThe purpose of this study was to investigate the appearance and possible cause of an artifact seen in limited-volume cone-beam CT imaging.MethodsA water-filled plastic cylinder was used as a phantom of the head. A test object was constructed as a bone-equivalent phantom to be imaged. The test object was variously positioned at the center of the phantom and near its margins. CT images of the test object were acquired using a 3DX Accuitomo system.ResultsIn slice images with the test object positioned near the margin of the phantom, arch-shaped defects or deformities were observed on the side of the object. There was a negative correlation between the artifact and the CT value of the object. The artifact was larger in images scanned with a higher voltage.ConclusionThe probability that this artifact is caused by halation from the image intensifier (II) system is suggested.
Journal: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology - Volume 101, Issue 5, May 2006, Pages 652–657