PURPOSE To demonstrate accelerated imaging with both artifact reduction and different contrast mechanisms near metallic implants. MATERIALS AND METHODS Slice-encoding for metal artifact correction (SEMAC) is a modified spin echo sequence that uses view-angle tilting and slice-direction phase encoding to correct both in-plane and through-plane artifacts. Standard spin echo trains and short-TI ...

To investigate the effect of metal implants in proton radiotherapy, dose distributions of different, clinically relevant treatment plans have been measured in an anthropomorphic phantom and compared to treatment planning predictions. The anthropomorphic phantom, which is sliced into four segments in the cranio-caudal direction, is composed of tissue equivalent materials and contains a titanium ...

Transorbital brain injuries caused by metal bar penetration are uncommon and often cause serious damage without prompt treatment. Artifacts caused by the penetrating metal bar on computed tomography (CT) often obscure the actual brain damage along the path of penetration, and delayed treatment for the brain insult may result. We present 2 cases of transorbital brain injury following penetration...

Magnetic resonance imaging (MRI) near metallic implants remains an unmet need because of severe artifacts, which mainly stem from large metal-induced field inhomogeneities. This work addresses MRI near metallic implants with an innovative imaging technique called "Slice Encoding for Metal Artifact Correction" (SEMAC). The SEMAC technique corrects metal artifacts via robust encoding of each exci...

PURPOSE Our purpose was to define the role of dental bur fragments in producing metal artifacts on MR images. METHODS Dental prosthetic reconstructions were made for two dogs. The two lower second premolars were prepared for full-cast crowns by using a diamond bur. The crown margin was placed subgingivally on the right side (1 mm below the free gingival margin) and at the same level as the fr...

This study aims to investigate the corrosion characteristics of bronze artifacts according lead contents by conducting a comprehensive analysis on layers and products focusing excavated ternary alloys with various chemical compositions.</br>From research outcome, selective corrosion, high-tin layers, compounds were identified in two artifacts, there was difference structure core metal bet...

Background: One of the artifacts found on CT scan is a metal artifact. Metal are caused by objects present in patients’ bodies. The file can cover organ that will be evaluated, and it inferred with pixel value (CT number) assessment tissue around metal. Purpose: To determine effect band pass median filter find optimal to reduce head scan. Method: A total 43 samples patients’s files from CT-scan...

Introdouction: One of the reasons that cause a pathologist to make an incorrect diagnosis includes artifacts leading to tissue changes and artificial structures in microscopic slides. The aim of this study was to examine the artifacts in histopathological slides in Zahedan School of Dentistry. Materials and methods: In this cross-sectional study, all the available slides in Oral and Maxil...

This study aimed to show the effects of metal artifacts on the in vivo micro-CT of mini-implants by measuring bone volume. We drilled a hole in the cortical bone of a rat tibia and embedded a titanium orthodontic mini-implant (diameter, 1.5 mm) in the hole. Twelve individually weighed hydroxyapatite grains (HA grains) were placed around the implant either by one dentist (method 1) or separately...

BACKGROUND Magnetic resonance imaging (MRI) has been used to study configurations of speech organs in the resting state. However, MRI is sensitive to metals, and numerous types of metallic appliances, most of which have a large magnetic susceptibility, are used in orthodontic treatment and may cause severe artifacts on MRI. We have developed techniques for obtaining MRI movies of the oral regio...