49,707 results match your criteria radiography systems


Lateralized Glenosphere Reverse Shoulder Arthroplasty: Inlay and Onlay Designs have Similar Clinical Outcomes in Patients with Glenohumeral Osteoarthritis.

J Shoulder Elbow Surg 2021 Sep 17. Epub 2021 Sep 17.

Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA. Electronic address:

Background: Whether or how the position of the humeral tray (inlay or onlay) in reverse shoulder arthroplasty (RSA) affects outcomes is unclear. Our goal was to compare the clinical and radiographic results of RSA systems with inlay versus onlay designs but with similar neck shaft angles (NSAs) and lateralized glenospheres.

Methods: We screened the institutional database at our tertiary academic center for patients who underwent primary RSA (with a lateralized glenosphere and a 135° NSA) from 2009 through 2017. Read More

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September 2021

Magnetic lipid nanovehicles synergize the controlled thermal release of chemotherapeutics with magnetic ablation while enabling non-invasive monitoring by MRI for melanoma theranostics.

Bioact Mater 2022 Feb 17;8:153-164. Epub 2021 Jun 17.

Advanced (Magnetic) Theranostic Nanostructures Lab. International Iberian Nanotechnology Laboratory, Avda. Mestre José Veiga s/n, 4715-330, Braga, Portugal.

Nowadays, a number of promising strategies are being developed that aim at combining diagnostic and therapeutic capabilities into clinically effective formulations. Thus, the combination of a modified release provided by an organic encapsulation and the intrinsic physico-chemical properties from an inorganic counterpart opens new perspectives in biomedical applications. Herein, a biocompatible magnetic lipid nanocomposite vehicle was developed through an efficient, green and simple method to simultaneously incorporate magnetic nanoparticles and an anticancer drug (doxorubicin) into a natural nano-matrix. Read More

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February 2022

Predicting primary site of secondary liver cancer with a neural estimator of metastatic origin.

J Med Imaging (Bellingham) 2020 Jan 18;7(1):012706. Epub 2020 Feb 18.

Oregon Health and Science University, Computational Biology Program, Biomedical Engineering Department, Portland, Oregon, United States.

: Pathologists rely on relevant clinical information, visual inspection of stained tissue slide morphology, and sophisticated molecular diagnostics to accurately infer the biological origin of secondary metastatic cancer. While highly effective, this process is expensive in terms of time and clinical resources. We seek to develop and evaluate a computer vision system designed to reasonably infer metastatic origin of secondary liver cancer directly from digitized histopathological whole slide images of liver biopsy. Read More

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January 2020

Dynamic Myocardial Perfusion CT for the Detection of Hemodynamically Significant Coronary Artery Disease.

JACC Cardiovasc Imaging 2021 Sep 8. Epub 2021 Sep 8.

Department of Radiology and Nuclear Medicine, Erasmus University Medical Center, University Medical Center Rotterdam, Rotterdam, the Netherlands; Department of Cardiology, Erasmus University Medical Center, University Medical Center Rotterdam, Rotterdam, the Netherlands; Stanford University School of Medicine and Cardiovascular Institute, Stanford, California, USA. Electronic address:

Objectives: In this international, multicenter study, using third-generation dual-source computed tomography (CT), we investigated the diagnostic performance of dynamic stress CT myocardial perfusion imaging (CT-MPI) in addition to coronary CT angiography (CTA) compared to invasive coronary angiography (ICA) and invasive fractional flow reserve (FFR).

Background: CT-MPI combined with coronary CTA integrates coronary artery anatomy with inducible myocardial ischemia, showing promising results for the diagnosis of hemodynamically significant coronary artery disease in single-center studies.

Methods: At 9 centers in Europe, Japan, and the United States, 132 patients scheduled for ICA were enrolled; 114 patients successfully completed coronary CTA, adenosine-stress dynamic CT-MPI, and ICA. Read More

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September 2021

COVID-19: Impact on radiology departments and implications for future service design, service delivery, and radiology education.

Br J Radiol 2021 Sep 19:20210632. Epub 2021 Sep 19.

University Hospitals of Morecambe Bay NHS Foundation Trust, Royal Lancaster Infirmary, Lancaster, United Kingdom.

The pandemic caused by SARS-CoV-2 (severe adult respiratory distress syndrome Coronavirus-2) and its most severe clinical syndrome, COVID-19, has dramatically impacted service delivery in many radiology departments. Radiology (primarily chest radiography and CT) has played a pivotal role in managing the pandemic in countries with well-developed healthcare systems, enabling early diagnosis, triage of patients likely to require intensive care and detection of arterial and venous thrombosis complicating the disease. We review the lessons learned during the early response to the pandemic, placing these in the wider context of the responsibility radiology departments have to mitigate the impact of hospital-acquired infection on clinical care and staff wellbeing. Read More

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September 2021

Dual energy CT in pulmonary vascular disease.

Br J Radiol 2021 Sep 19:20210699. Epub 2021 Sep 19.

Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.

Dual energy CT (DECT) imaging is a technique that extends the capabilities of CT beyond that of established densitometric evaluations. CT pulmonary angiography (CTPA) performed with dual energy technique benefits from both the availability of low kVp CT data and also the concurrent ability to quantify iodine enhancement in the lung parenchyma. Parenchymal enhancement, presented as pulmonary perfused blood volume maps, may be considered a surrogate of pulmonary perfusion. Read More

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September 2021

Interventions to reduce low-value imaging - a systematic review of interventions and outcomes.

BMC Health Serv Res 2021 Sep 18;21(1):983. Epub 2021 Sep 18.

Institute for the Health Sciences at the Norwegian University of Science and Technology (NTNU) at Gjøvik, NTNU Gjøvik, Postbox 191, 2802, Gjøvik, Norway.

Background: It is estimated that 20-50% of all radiological examinations are of low value. Many attempts have been made to reduce the use of low-value imaging. However, the comparative effectiveness of interventions to reduce low-value imaging is unclear. Read More

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September 2021

Patient, Provider, and Clinic Characteristics Associated with Opioid and Non-Opioid Pain Prescriptions for Patients Receiving Low Back Imaging in Primary Care.

J Am Board Fam Med 2021 Sep-Oct;34(5):950-963

From the Department of Radiology, School of Medicine, University of Washington, Seattle, WA (LSG, KTJ, SKJ, JGJ); Clinical Learning, Evidence, and Research Center, University of Washington, Seattle, WA (LSG, ENM, JAT, KTJ, JLF, PS, SKJ, PJH, JGJ); Department of Pharmacy, School of Pharmacy, University of Washington, Seattle, WA (ZAM); Department of Biostatistics, University of Washington, Seattle, WA (ENM, PJH); Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA (JAT); Department of Rehabilitation Medicine, University of Washington, Seattle, WA (JAT, JLF); Department of Radiology Mayo Clinic, Rochester, MN (DFK, PHL); Department of Radiology, Henry Ford Hospital, Detroit, MI, (BG); Kaiser Permanente Washington, Seattle, WA (KJS); Rehabilitation Care Services, VA Puget Sound Health Care System, Seattle, WA (PS); Departments of Family Medicine and Internal Medicine, Oregon Health & Science University, Portland, OR (RAD); Division of Research, Kaiser Permanente Northern California, Oakland, CA (ALA).

Background: To describe characteristics of patients, providers, and clinics associated with opioid or non-opioid pain medication prescribing patterns for patients who received lower spine imaging in primary care clinics.

Methods: In these secondary analyses of the Lumbar Imaging with Reporting of Epidemiology (LIRE) study, a randomized controlled trial conducted in 4 health systems in the United States, we evaluated characteristics associated with receipt of pain medication prescriptions. The outcomes were receipt of prescriptions for opioid or, separately, non-opioid pain medications within 90 days after imaging. Read More

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January 2021

Non-invasive and accurate readout of superoxide anion in biological systems by near-infrared light.

Anal Chim Acta 2021 Sep 5;1179:338827. Epub 2021 Jul 5.

Graduate School of Bioresources, Mie University, 1577 Kurimamachiya, Tsu, Mie, 514-8507, Japan. Electronic address:

Infectious and inflammatory diseases involve superoxide anion (O) production. Real-time and non-invasive evaluation of O in intact biological systems has been a significant challenge in biology and medicine. Here, I report that an advanced near-infrared chemiluminescent probe, MCLA-800, enables reliable non-invasive optical readout of Oex vivo and in vivo. Read More

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September 2021

Impairments of cerebral blood flow microcirculation in rats brought on by cardiac cessation and respiratory arrest.

J Biophotonics 2021 Sep 17:e202100216. Epub 2021 Sep 17.

Histology, Cytology and Embryology Department, I.M. Sechenov First Moscow State Medical University, Moscow, Russia.

The impairments of cerebral blood flow microcirculation brought on by cardiac and respiratory arrest were assessed with multi-modal diagnostic facilities, utilising laser speckle contrast imaging, fluorescence spectroscopy and diffuse reflectance spectroscopy. The results of laser speckle contrast imaging show a notable reduction of cerebral blood flow in small and medium size vessels during a few minutes of respiratory arrest, while the same effect was observed in large sinuses and their branches during the circulatory cessation. Concurrently, the redox ratio assessed with fluorescence spectroscopy indicates progressing hypoxia, NADH accumulation and increase of FAD consumption. Read More

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September 2021

Tuberous Sclerosis: Current Update.

Radiographics 2021 Sep 17:210103. Epub 2021 Sep 17.

From the Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Pickens Academic Tower, 1400 Pressler St, Unit 1473, Houston, TX 77030-4009 (M.X.W., D.G.); Department of Radiology, Mayo Clinic Arizona, Scottsdale, Ariz (N.S.); Mallinckrodt Institute of Radiology, Section of Abdominal Imaging, Washington University School of Medicine, St Louis, Mo (S.B.); Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wis (P.J.P., M.G.L.); and Department of Radiology, University of Texas at San Antonio, San Antonio, Tex (V.S.K.).

Tuberous sclerosis complex (TSC) is a relatively rare autosomal dominant neurocutaneous disorder secondary to mutations in the or tumor suppressor genes. Although manifestation of the classic triad of seizures, intellectual disability, and facial angio-fibromas may facilitate timely diagnosis of TSC, the multisystem features that may indicate TSC in the absence of these manifestations remain highly variable. In addition, patients with TSC are at risk of developing multiple benign and malignant tumors in various organ systems, resulting in increased morbidity and mortality. Read More

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September 2021

Tele-Operative Low-Cost Robotic Lung Ultrasound Scanning Platform for Triage of COVID-19 Patients.

IEEE Robot Autom Lett 2021 Jul 24;6(3):4664-4671. Epub 2021 Mar 24.

Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609 USA.

Novel severe acute respiratory syndrome coronavirus 2 (COVID-19) has become a pandemic of epic proportions, and global response to prepare health systems worldwide is of utmost importance. 2-dimensional (2D) lung ultrasound (LUS) has emerged as a rapid, noninvasive imaging tool for diagnosing COVID-19 infected patients. Concerns surrounding LUS include the disparity of infected patients and healthcare providers, and importantly, the requirement for substantial physical contact between the patient and operator, increasing the risk of transmission. Read More

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[Pathological diagnosis and clinical significance of appendiceal epithelial neoplasms].

Zhonghua Zhong Liu Za Zhi 2021 Sep;43(9):906-911

Department of Pathology, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China.

Appendiceal epithelial neoplasms including benign and malignant, are clinically rare. There were quite a lot of changings in classification systems for them and different pathological diagnostic terminologies were used, resulted in confusions of understanding and communication for both pathologists and clinicians. Basically, appendiceal epithelial neoplasms include adenoma, serrated lesion and polyps, mucinous neoplasms, carcinoma and neuroendocrine neoplasms. Read More

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September 2021

Opportunistic CT screening of osteoporosis on thoracic and lumbar spine: a meta-analysis.

Clin Imaging 2021 Aug 10;80:382-390. Epub 2021 Aug 10.

Department of Radiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. Electronic address:

Background: Osteoporotic fractures are a major contributor to late life morbidity and mortality, and impose a substantial societal cost, yet osteoporosis remains substantially underdiagnosed and undertreated. The purpose of this meta-analysis was to assess the pooled diagnostic sensitivity and specificity of computed tomography (CT) images for diagnosing osteoporosis in patients who meet WHO dual X-ray absorptiometry (DXA) osteoporosis criteria using specific Hounsfield unit (HU) values as a threshold.

Methods: Systematic literature searches in PubMed, Embase, Web of Science and Google Scholar were performed from the earliest available date through 1 July 2018, restricted to publications in English. Read More

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Phase and power modulations on the amplitude of TMS-induced motor evoked potentials.

PLoS One 2021 16;16(9):e0255815. Epub 2021 Sep 16.

Section Brain Stimulation and Cognition, Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands.

The evaluation of transcranial magnetic stimulation (TMS)-induced motor evoked potentials (MEPs) promises valuable information about fundamental brain related mechanisms and may serve as a diagnostic tool for clinical monitoring of therapeutic progress or surgery procedures. However, reports about spontaneous fluctuations of MEP amplitudes causing high intra-individual variability have led to increased concerns about the reliability of this measure. One possible cause for high variability of MEPs could be neuronal oscillatory activity, which reflects fluctuations of membrane potentials that systematically increase and decrease the excitability of neuronal networks. Read More

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September 2021

Radiographic diagnosis of proximal caries is not affected by exposure protocols and presence of high-density material on systems with automatic exposure compensation.

Oral Radiol 2021 Sep 16. Epub 2021 Sep 16.

Department of Clinical and Preventive Dentistry, Federal University of Pernambuco (UFPE), Av. Prof. Artur de Sá, 329-481, Recife, Pernambuco, Zip Code 52171-011, Brazil.

Objectives: To investigate the performance of radiographic systems with automatic exposure compensation (AEC) on the caries diagnosis in images acquired with different exposure parameters and in the presence of high-density material. Also, the image quality was assessed.

Methods: Forty posterior teeth (80 proximal surfaces) were radiographed using a phosphor plate and a CMOS system. Read More

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September 2021

Subtraction iodine imaging with area detector CT to improve tumor delineation and measurability of tumor size and depth of invasion in tongue squamous cell carcinoma.

Jpn J Radiol 2021 Sep 16. Epub 2021 Sep 16.

Department of Diagnostic Radiology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.

Purpose: Tumor size and depth of invasion (DOI) are mandatory assessments for tumor classification in tongue cancer but are often non-assessable on CT due to dental artifacts. This study investigated whether subtraction iodine imaging (SII) would improve tumor delineation and measurability.

Materials And Methods: Fifty-seven consecutive patients with tongue cancer, who underwent scanning with a 320-row area detector CT with contrast administration and were treated with surgical resection, were retrospectively evaluated. Read More

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September 2021

Optimizing integrated imaging service delivery by tier in low-resource health systems.

Insights Imaging 2021 Sep 16;12(1):129. Epub 2021 Sep 16.

Department of Pediatric Radiology, The Children's Hospital of Philadelphia and the Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA.

Access to imaging diagnostics has been shown to result in accurate treatment, management, and optimal outcomes. Particularly in low-income and low-middle-income countries (LICs, LMICs), access is limited due to a lack of adequate resources. To achieve Sustainable Development Goal (SDG) 3, access to imaging services is critical at every tier of the health system. Read More

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September 2021

Application of Artificial Intelligence in Acute Coronary Syndrome: A Brief Literature Review.

Adv Ther 2021 Sep 15. Epub 2021 Sep 15.

Department of Cardiology, Peking University People's Hospital, Beijing, People's Republic of China.

Artificial intelligence (AI) is defined as a set of algorithms and intelligence to try to imitate human intelligence. Machine learning is one of them, and deep learning is one of those machine learning techniques. The application of AI in healthcare systems including hospitals and clinics has many possible advantages and future prospects. Read More

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September 2021

Real-world analysis of artificial intelligence in musculoskeletal trauma.

J Clin Orthop Trauma 2021 Nov 27;22:101573. Epub 2021 Aug 27.

Data Science Team, DeepTek Inc., USA.

Musculoskeletal trauma accounts for a large percentage of emergency room visits and is amongst the top causes of unscheduled patient visits to the emergency room. Musculoskeletal trauma results in expenditure of billions of dollars and protracted losses of quality-adjusted life years. New and innovative methods are needed to minimise the impact by ensuring quick and accurate assessment. Read More

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November 2021

Training Convolutional Networks for Prostate Segmentation With Limited Data.

IEEE Access 2021 27;9:109214-109223. Epub 2021 Jul 27.

Department of Radiology, University of Minnesota, Minneapolis, MN 55455, USA.

Multi-zonal segmentation is a critical component of computer-aided diagnostic systems for detecting and staging prostate cancer. Previously, convolutional neural networks such as the U-Net have been used to produce fully automatic multi-zonal prostate segmentation on magnetic resonance images (MRIs) with performance comparable to human experts, but these often require large amounts of manually segmented training data to produce acceptable results. For institutions that have limited amounts of labeled MRI exams, it is not clear how much data is needed to train a segmentation model, and which training strategy should be used to maximize the value of the available data. Read More

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Proteomic Profiling of Extracellular Vesicles Separated from Plasma of Former National Football League Players at Risk for Chronic Traumatic Encephalopathy.

Aging Dis 2021 Sep 1;12(6):1363-1375. Epub 2021 Sep 1.

1Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, USA.

Chronic Traumatic Encephalopathy (CTE) is a tauopathy that affects individuals with a history of exposure to repetitive head impacts, including National Football League (NFL) players. Extracellular vesicles (EVs) are known to carry tau in Alzheimer's disease and other tauopathies. We examined protein profiles of EVs separated from the plasma of former NFL players at risk for CTE. Read More

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September 2021

Systemic Mastocytosis: Radiological Point of View.

Mediterr J Hematol Infect Dis 2021 1;13(1):e2021056. Epub 2021 Sep 1.

Department of Radiological and Hematological Sciences, Università Cattolica del Sacro Cuore, Largo A. Gemelli 1, 00168 Rome, Italy.

Radiological diagnosis of systemic mastocytosis (SM) can be hard to establish. This difficulty is mainly due to the variable radiological features involving many organ systems (e.g. Read More

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September 2021

The Algorithm Examining the Risk of Massive Transfusion (ALERT) Score Accurately Predicts Massive Transfusion at the Scene of Injury and on Arrival to the Trauma Bay: A Retrospective Analysis.

Shock 2021 Oct;56(4):529-536

Division of Critical Care, Department of Anesthesiology, R. Adams Cowley Shock Trauma Center, Baltimore, Maryland.

Background: Massive transfusion (MT) is required to resuscitate traumatically injured patients with complex derangements. Scoring systems for MT typically require laboratory values and radiological imaging that may delay the prediction of MT.

Study Design: The Trauma ALgorithm Examining the Risk of massive Transfusion (Trauma ALERT) study was an observational cohort study. Read More

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October 2021

Influence of editing pulse flip angle on J-difference MR spectroscopy.

Magn Reson Med 2021 Sep 14. Epub 2021 Sep 14.

Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.

Purpose: To investigate the editing-pulse flip angle (FA) dependence of editing efficiency and ultimately to maximize the edited signal of commonly edited MR spectroscopy (MRS) signals, such as gamma-aminobutyric acid (GABA) and lactate.

Methods: Density-matrix simulations were performed for a range of spin systems to find the editing-pulse FA for maximal editing efficiency. Simulations were confirmed by phantom experiments and in vivo measurements in 10 healthy participants using a 3T Philips scanner. Read More

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September 2021

Feasibility of Cardiac Computed Tomography for the Evaluation of Ventricular Function in Postoperative Children With Congenital Heart Disease: Comparison With Cardiac Magnetic Resonance Imaging.

J Comput Assist Tomogr 2021 Jul-Aug 01;45(4):537-543

From the Diagnostic Imaging Center.

Objective: We explored the feasibility of cardiac computed tomography (CCT) to evaluate postoperative ventricular function in children with congenital heart disease (CHD) and evaluated the accuracy and reproducibility of CCT using cardiac magnetic resonance (CMR) as a reference.

Methods: Thirty-two postoperative children with CHD (20 boys and 12 girls) who underwent CMR and CCT were enrolled. Left and right ventricular ejection fraction, end-diastolic volume, end-systolic volume, stroke volume, and cardiac index were measured using cardiac function analysis software. Read More

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September 2021

Genetic-based adaptive momentum estimation for predicting mortality risk factors for COVID-19 patients using deep learning.

Int J Imaging Syst Technol 2021 Aug 13. Epub 2021 Aug 13.

Department of Computer Science Lulea University of Technology (LTU) Sweden.

The mortality risk factors for coronavirus disease (COVID-19) must be early predicted, especially for severe cases, to provide intensive care before they develop to critically ill immediately. This paper aims to develop an optimized convolution neural network (CNN) for predicting mortality risk factors for COVID-19 patients. The proposed model supports two types of input data clinical variables and the computed tomography (CT) scans. Read More

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Update on the current opinion, status and future development of digital pathology in Switzerland in light of COVID-19.

J Clin Pathol 2021 Sep 13. Epub 2021 Sep 13.

Department of Oncology, Lausanne University Hospital, Lausanne, Switzerland.

Aims: The transition from analogue to digital pathology (DP) in Switzerland has coincided with the COVID-19 crisis. The Swiss Digital Pathology Consortium conducted a national survey to assess the experience of pathologists in dealing with the challenges of the pandemic and how this has influenced the outlook and adoption of DP.

Methods: A survey containing 20 questions relating to DP, personal experiences and challenges during the pandemic was addressed to Swiss pathologists at different experience stages in private practice, community and university hospitals. Read More

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September 2021

Unsaturated lipid isomeric imaging based on the Paternò-Büchi reaction in the solid phase in ambient conditions.

Talanta 2021 Dec 20;235:122816. Epub 2021 Aug 20.

State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Zhongguancun Street, Haidian District, Beijing, 100084, China. Electronic address:

In recent years, the development of unsaturated lipid isomeric imaging based on the Paternò-Büchi (PB) reaction has improved significantly. However, research on this imaging method in ambient conditions needs to expand. In this paper, a method of PB reaction in the solid phase in ambient conditions is developed, which is combined with air-flow-assisted desorption electrospray ionisation mass spectrometry (AFADESI-MS) to achieve in situ imaging of lipids at an isomeric level. Read More

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December 2021

Preclinical short QT syndrome models: studying the phenotype and drug-screening.

Europace 2021 Sep 13. Epub 2021 Sep 13.

University of Mannheim, University of Heidelberg, Germany.

Cardiovascular diseases are the main cause of sudden cardiac death (SCD) in developed and developing countries. Inherited cardiac channelopathies are linked to 5-10% of SCDs, mainly in the young. Short QT syndrome (SQTS) is a rare inherited channelopathy, which leads to both atrial and ventricular tachyarrhythmias, syncope, and even SCD. Read More

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September 2021