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Perceived Dark Rim Artifact in First-Pass Myocardial Perfusion Magnetic Resonance Imaging Due to Visual Illusion

Shin T, Nayak KS

OBJECTIVE: To demonstrate that human visual illusion can contribute to sub-endocardial dark rim artifact in contrast-enhanced myocardial perfusion magnetic resonance images. MATERIALS AND METHODS: Numerical phantoms were generated to simulate the...
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Does the metal artifact reduction algorithm activation mode influence the magnitude of artifacts in CBCT images?

Fontenele , Nascimento EHL, Santaella , Freitas DQ

PURPOSE: This study was conducted to assess the effectiveness of a metal artifact reduction (MAR) algorithm activated at different times during cone-beam computed tomography (CBCT) acquisition on the magnitude of...
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Magnitude of beam-hardening artifacts produced by gutta-percha and metal posts on cone-beam computed tomography with varying tube current

Gaêta-Araujo H, Nascimento EHL, Fontenele , Mancini AX, Freitas DQ, Oliveira-Santos C

PURPOSE: This study was performed to evaluate the magnitude of artifacts produced by gutta-percha and metal posts on cone-beam computed tomography (CBCT) scans obtained with different tube currents and with...
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Low-Dose Abdominal CT Using a Deep Learning-Based Denoising Algorithm: A Comparison with CT Reconstructed with Filtered Back Projection or Iterative Reconstruction Algorithm

Shin YJ, Chang W, Ye JC, Kang E, Oh DY, Lee YJ, Park JH, Kim YH

OBJECTIVE: To compare the image quality of low-dose (LD) computed tomography (CT) obtained using a deep learning-based denoising algorithm (DLA) with LD CT images reconstructed with a filtered back projection...
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Gastromalacia (Postmortem Gastric Perforation): Two Cases Reports

Kim DJ, Lee S

Gastromalacia refers to the postmortem acute autolytic erosion of the gastric wall. It should be distinguished from gastric perforations caused by antemortem injuries or other pathologic processes, such as ulcer...
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Ultrasonographic Demonstration of the Tissue Microvasculature in Children: Microvascular Ultrasonography Versus Conventional Color Doppler Ultrasonography

Yoo J, Je BK, Choo JY

Microvascular ultrasonographic imaging is the most recent and unique Doppler ultrasound technique. It uses an advanced clutter filter that can remove clutter artifacts and preserve the low-velocity microvascular flow signal....
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Precision Medicine and Cardiovascular Health: Insights from Mendelian Randomization Analyses

Spiller W, Jung KJ, Lee JY, Jee SH

Cardiovascular disease (CVD) is considered a primary driver of global mortality and is estimated to be responsible for approximately 17.9 million deaths annually. Consequently, a substantial body of research related...
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Metallic Artifacts on MR Imaging and Methods for Their Reduction

Choo HJ, Lee SJ, Lee YH

Metallic artifacts on MR imaging are typically induced by differences in magnetic susceptibility between the metallic implant and surrounding tissue. Conventional techniques for metal artifact reduction require MR machines with...
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Feasibility of Simultaneous Multislice Acceleration Technique in Diffusion-Weighted Magnetic Resonance Imaging of the Rectum

Park JH, Seo N, Lim JS, Hahm J, Kim MJ

OBJECTIVE: To assess the feasibility of simultaneous multislice-accelerated diffusion-weighted imaging (SMS-DWI) of the rectum in comparison with conventional DWI (C-DWI) in rectal cancer patients. MATERIALS AND METHODS: This study included 65...
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Automated Breast Ultrasound Screening for Dense Breasts

Kim SH, Kim HH, Moon WK

Mammography is the primary screening method for breast cancers. However, the sensitivity of mammographic screening is lower for dense breasts, which are an independent risk factor for breast cancers. Automated...
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Clinical Applications of Wide-Detector CT Scanners for Cardiothoracic Imaging: An Update

Kang EJ

Technical developments in multidetector computed tomography (CT) have increased the number of detector rows on the z-axis, and 16-cm wide-area-coverage CT scanners have enabled volumetric scanning of the entire heart....
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Pinworm Infection at Salmon Ruins and Aztec Ruins: Relation to Pueblo III Regional Violence

Reinhard K, Camacho M

The study of coprolites has been a theme of archaeology in the American Southwest. A feature of archaeoparasitology on the Colorado Plateau is the ubiquity of pinworm infection. As a...
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Acceptance Test and Clinical Commissioning of CT Simulator

An HJ, Son J, Jin H, Sung J, Chun M

This study examined the clinical use of two newly installed computed tomography (CT) simulators in the Department of Radiation Oncology. The accreditation procedure was performed by the Korean Institute for...
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Parameters Affecting India Ink Artifacts on Opposed-Phase MR Images

Kim BR, Ha DH

PURPOSE: To determine the MR parameters affecting India ink artifacts on opposed-phase chemical shift magnetic resonance (MR) imaging. MATERIALS AND METHODS: The use of a female Sprague-Dawley rat was approved by...
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Generating Motion- and Distortion-Free Local Field Map Using 3D Ultrashort TE MRI: Comparison with Tâ‚‚* Mapping

Jeong K, Thapa B, Han BS, Kim D, Jeong EK

PURPOSE: To generate phase images with free of motion-induced artifact and susceptibility-induced distortion using 3D radial ultrashort TE (UTE) MRI. MATERIALS AND METHODS: The field map was theoretically derived by solving...
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Follow-up of Metal-on-Metal Hip Replacements at a Large District Hospital and the Implementation of Medicines and Healthcare Products Regulatory Agency Guidelines: A Review of 297 Patients

Hughes L, Chamberlain K, Robinson H, Sloan A, Choudry Q

BACKGROUND: Medicines and Healthcare products Regulatory Agency (MHRA) guidance for patients with metal-on-metal (MoM) hip replacements was provided in 2012 and updated in 2017 to assist in the early detection...
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Follow-Up Decision Support Tool for Public Healthcare: A Design Research Perspective

Miah SJ, Hasan N, Gammack J

OBJECTIVES: Mobile health (m-Health) technologies may provide an appropriate follow-up support service for patient groups with post-treatment conditions. While previous studies have introduced m-Health methods for patient care, a smart...
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Intraoperative consultation for ovarian tumors

Kim I

The primary function of intraoperative frozen consultation is to provide an as accurate and prompt diagnosis as possible during surgery and to guide the surgeon in further management. However, the...
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The Role of Double Inversion Recovery Imaging in Acute Ischemic Stroke

Choi NY, Park S, Lee CM, Ryu CW, Jahng GH

PURPOSE: The purpose of this study was to investigate if double inversion recovery (DIR) imaging can have a role in the evaluation of brain ischemia, compared with diffusion-weighted imaging (DWI)...
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Determination and classification of intraoral phosphor storage plate artifacts and errors

Deniz Y, Kaya S

PURPOSE: The aim of this study was to determine the reasons and solutions for intraoral phosphor storage plate (PSP) image artifacts and errors, and to develop an appropriate classification of...
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