Because of the different attenuations of tissues at different energy levels, dual-energy CT offers tissue differentiation and characterization, reduction of artifacts, and remodeling of contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR), hereby creating new opportunities and insights in CT imaging. The applications for dual-energy imaging in neuroradiology are various and still expan...

In transportation security applications, Computed Tomography (CT) scanners are widely used to scan checked baggage for threatening materials. Traditionally, images are reconstructed using direct methods, such as fi ltered back projection (FBP). Model-based iterative reconstruction (MBIR) potentially offers many important advantages over traditional methods for the security screening of checked ...

BACKGROUND AND PURPOSE Important findings, such as aneurysm remnants or major arterial occlusion, can be detected on intra- or postoperative angiography after surgical clipping of intracranial aneurysms. The purpose of this study was to evaluate the feasibility of IV-ACT for the postoperative detection of residual aneurysms and parent vessel patency compared with IA-DSA, which was selected as t...

The aim of this study was to determine whether image artifacts caused by orthodontic metal accessories interfere with the accuracy of 3D CBCT model superimposition. A human dry skull was subjected three times to a CBCT scan: at first without orthodontic brackets (T1), then with stainless steel brackets bonded without (T2) and with orthodontic arch wires (T3) inserted into the brackets' slots. T...

BACKGROUND Intraoperative morphological and functional monitoring is essential for safe neurosurgery. Functional monitoring is based on electroencephalography (EEG), which uses silver electrodes. However, these electrodes generate metal artifacts as silver blocks X-rays, creating white radial lines on computed tomography (CT) images during surgery. Thick electrodes interfere with surgical proce...

INTRODUCTION Vertical root fracture (VRF) is common in endodontically treated teeth. Conventional and digital radiographies have limitations for detection of VRFs. Cone-beam computed tomography (CBCT) offers greater detection accuracy of VRFs in comparison with conventional radiography. This study compared the effects of metal artifacts on detection of VRFs by using two CBCT systems. METHODS ...

UNLABELLED It was the aim of this study to implement an algorithm modifying Dixon-based MR imaging datasets for attenuation correction in hybrid PET/MR imaging with a multiacquisition variable resonance image combination (MAVRIC) sequence to reduce metal artifacts. METHODS After ethics approval, in 8 oncologic patients with dental implants data were acquired in a trimodality setup with PET/CT...

While traditional direct reconstruction algorithms such as filtered back projection (FBP) and direct Fourier method (DFM) depend on the analytic inversion of sinogram data, model-based reconstruction methods rely on iterative optimization of a statistical model of both the acquired data and the unknown image. Model-based iterative reconstruction (MBIR) potentially offers many important advantag...

Wearable Electronics In article 2300326, I-Ming Hsing and co-workers develop a wearable adhesive 12-lead ECG patch for ambulatory monitoring, with an innovative user-friendly design that can seamlessly interface human skin. The unique combination of hydrogel, elastomer, liquid metal imparts biocompatibility, stretchability, wet adhesiveness. It accurately measure stable signals during diverse p...