Article ID Journal Published Year Pages File Type
3170092 Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 2006 6 Pages PDF
Abstract

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.

Related Topics
Health Sciences Medicine and Dentistry Dentistry, Oral Surgery and Medicine
Authors
, , , , , , , ,