266 results match your criteria tomographic diagnostics

Challenging diagnostic work-up of a massive fluid-filled structure in the cranial abdomen of a cat.

Tierarztl Prax Ausg K Kleintiere Heimtiere 2021 Oct 12. Epub 2021 Oct 12.

Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation.

A 9-year-old female, neutered European shorthair cat was presented with acute vomiting, obvious jaundice and painful enlargement of the abdomen. Icteric skin and mucous membranes in addition to severe bilirubinaemia (mainly direct bilirubin) and a large increase in liver enzyme activities were the main findings at the initial examination. Radio- and ultrasonographic evaluation revealed a massive fluid-filled structure caudal to the liver displacing abdominal organs, in particular the stomach. Read More

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October 2021

The Potential Role of Cardiac CT in the Evaluation of Patients With Known or Suspected Cardiomyopathy: From Traditional Indications to Novel Clinical Applications.

Front Cardiovasc Med 2021 14;8:709124. Epub 2021 Sep 14.

Centro Cardologico Monzino, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), Milan, Italy.

After 15 years from its advent in the clinical field, coronary computed tomography (CCTA) is now widely considered as the best first-step test in patients with low-to-moderate pre-test probability of coronary artery disease. Technological innovation was of pivotal importance for the extensive clinical and scientific interest in CCTA. Recently, the advent of last generation wide-coverage CT scans paved the way for new clinical applications of this technique beyond coronary arteries anatomy evaluation. Read More

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September 2021

Troponin-Guided Coronary Computed Tomographic Angiography After Exclusion of Myocardial Infarction.

J Am Coll Cardiol 2021 Oct;78(14):1407-1417

BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, United Kingdom; Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, United Kingdom. Electronic address:

Background: Patients with suspected acute coronary syndrome in whom myocardial infarction has been excluded are at risk of future adverse cardiac events.

Objectives: This study evaluated the usefulness of high-sensitivity cardiac troponin I (hs-cTnI) to select patients for further investigation after myocardial infarction has been excluded.

Methods: This is a prospective cohort study of patients presenting to the emergency department with suspected acute coronary syndrome and hs-cTnI concentrations below the sex-specific 99th percentile. Read More

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October 2021

Onsite Computed Tomography Fractional Flow Reserve in Patients with Suspected Stable Coronary Artery Disease Initial Experience.

Indian J Radiol Imaging 2021 Apr 28;31(2):291-296. Epub 2021 Jul 28.

Department of Computed Tomography, Advanced Diagnostics and Institute of Imaging, Amritsar, Punjab, India.

Computed tomographic coronary angiographic (CTCA) has evolved into a robust technique to detect significant stenosis; however, there is a discordance in the anatomic and functional significance of stenosis. Therefore, patients with stable coronary artery disease need to be further evaluated before deciding for any revascularization procedure. A total of 100 consecutive patients of suspected stable coronary artery disease who underwent CTCA were evaluated for functional significance of lesions using onsite computed tomography fractional flow reserve (CTFFR) and the results were compared for detection of both significant and hemodynamically significant/severe stenosis on per vessel and per patient basis and differences were statistically analyzed. Read More

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Review: tomographic imaging flow cytometry.

Lab Chip 2021 09 28;21(19):3655-3666. Epub 2021 Sep 28.

Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, D-07745 Jena, Germany.

Within the last decades, conventional flow cytometry (FC) has evolved as a powerful measurement method in clinical diagnostics, biology, life sciences and healthcare. Imaging flow cytometry (IFC) extends the power of traditional FC by adding high resolution optical and spectroscopic information. However, the conventional IFC only provides a 2D projection of a 3D object. Read More

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September 2021

CT diagnostics of pulmonary embolism: Does iodine delivery rate still affect image quality in iterative reconstruction?

Clin Hemorheol Microcirc 2021 Aug 28. Epub 2021 Aug 28.

Charité-Universitätsmedizin Berlin, Berlin, Germany.

Background: Computed tomographic (CT) imaging in suspected pulmonary artery embolism represents the standard procedure. Studies without iterative reconstruction proved beneficial using increased iodine delivery rate (IDR). This study compares image quality in pulmonary arteries on iteratively reconstructed CT images of patients with suspected pulmonary embolism using different IDR. Read More

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Budd-Chiari syndrome computed tomographic imaging: Elucidating the devil in the details.

J Pak Med Assoc 2021 Jul;71(7):1889-1892

Department of Cardiovascular Medicine, Oxford University, Oxford, United Kingdom.

Hepatic venous outflow obstruction, due to hepatic venous thrombosis is the hallmark of Budd-Chiari Syndrome (BCS), a relatively uncommon disorder. The aim of this study was to explore imaging details and causes, and define invasive and non-invasive interventions for achieving successful portosystemic shunting (PSS). The variations in imaging topology and associated risk factors in BCS cases, diagnosed during the past 20 months, were studied. Read More

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[Central neurological complication of an interscalene plexus catheter].

Anaesthesist 2021 Jul 29. Epub 2021 Jul 29.

Klinik für Anästhesie, Intensiv- und Notfallmedizin, ViDia Christliche Kliniken Karlsruhe, Standort St. Vincentius-Kliniken, Steinhäuserstraße 18, 76135, Karlsruhe, Deutschland.

A 78-year-old patient received an interscalene plexus catheter for perioperative pain therapy during implantation of an inverse shoulder prothesis. After stimulation-assisted puncture under sonographic control, 25 ml of local anesthetic (LA) were first administered and then the catheter was placed using the through the needle technique. Immediately after the administration of another 5 ml of local anesthetic via the inserted catheter, the patient showed symptoms of total spinal anesthesia, so that she had to be intubated and ventilated. Read More

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Visible cameras as a non-invasive diagnostic to study negative ion beam properties.

Rev Sci Instrum 2021 Apr;92(4):043302

Consorzio RFX (CNR, ENEA, INFN, UNIPD, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy.

Beam tomography is a non-invasive diagnostic that allows us to reconstruct the beam emission profile by measuring the light emitted by the beam particles interacting with the background gas, along an elevated number of lines of sight, which is related to the beam density by assuming a uniform background gas. In the framework of the heating and current drive of future nuclear fusion reactors, negative ion beams of hydrogen and deuterium are required for neutral beam injectors (NBIs) due to their elevated neutralization efficiency at high energy (in the MeV range). Beside the beam energy, beam divergence and homogeneity are two critical aspects in the design of future NBIs. Read More

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Optical phase contrast imaging for absolute, quantitative measurements of ultrasonic fields with frequencies up to 20 MHz.

J Acoust Soc Am 2021 Jun;149(6):4620

Applied Physics Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.

The technique of phase contrast imaging, combined with tomographic reconstructions, can rapidly measure ultrasonic fields propagating in water, including ultrasonic fields with complex wavefront shapes, which are difficult to characterize with standard hydrophone measurements. Furthermore, the technique can measure the absolute pressure amplitudes of ultrasonic fields without requiring a pressure calibration. Absolute pressure measurements have been previously demonstrated using optical imaging methods for ultrasonic frequencies below 2. Read More

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Three-dimensional cone-beam computed tomographic sialography in the diagnosis and management of primary Sjögren syndrome: Report of 3 cases.

Imaging Sci Dent 2021 Jun 11;51(2):209-216. Epub 2021 Mar 11.

Department of Public Health, Texila American University, Georgetown, Guyana.

Sjögren syndrome is a chronic autoimmune inflammatory disease characterized by lymphocytic infiltration of exocrine glands, predominantly the parotid and lacrimal glands, thereby resulting in oral and ocular dryness. It has been reported to occur most frequently in women between 40 and 50 years of age. Sjögren syndrome has an insidious onset, is slowly progressive, and presents a wide range of clinical manifestations, leading to delays or challenges in the diagnosis. Read More

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Exact reconstruction condition for angle-limited computed tomography of chemiluminescence.

Appl Opt 2021 May;60(15):4273-4281

Computed tomography of chemiluminescence (CTC) is an effective technique for three-dimensional (3D) combustion diagnostics. It reconstructs the 3D concentrations of intermediate species or 3D images of flame topology by multiple chemiluminescence projections captured from different perspectives. In the previous studies of CTC systems, it was assumed that projections from arbitrary perspectives are available. Read More

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Balloon valvuloplasty of valvular pulmonary stenosis in a neonatal foal.

J Vet Cardiol 2021 Aug 5;36:48-54. Epub 2021 May 5.

Clinic for Equine Internal Medicine, Equine Department, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, Zurich, CH-8057, Switzerland. Electronic address:

In a 1-day old filly with a loud heart murmur, transthoracic echocardiography revealed right ventricular hypertrophy associated with severe pulmonary valvular stenosis and a transvalvular pressure gradient (between right ventricle and pulmonary artery) of 125 mmHg. Computed tomographic angiography confirmed the finding, with no evidence of other relevant concurrent abnormalities. Balloon valvuloplasty was performed using a single balloon technique. Read More

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CBCT-based assessment of the anatomic relationship between maxillary sinus and upper teeth.

Clin Exp Dent Res 2021 May 22. Epub 2021 May 22.

Section of Oral Diagnostics and Surgery, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.

Objectives: To describe the relationship between maxillary sinus (MS) and upper teeth based on cone beam computed tomographic scans (CBCT).

Materials And Methods: Based on CBCT maxillary imaging data of 147 patients, distance between MS and apices of canines and posterior maxillary teeth were assessed. Distances between tooth roots and sinus were classified into three groups: distant (>2 mm), close (<2 mm) or in contact with MS. Read More

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Percutaneous CT Fluoroscopy-Guided Core Needle Biopsy of Mediastinal Masses: Technical Outcome and Complications of 155 Procedures during a 10-Year Period.

Diagnostics (Basel) 2021 Apr 26;11(5). Epub 2021 Apr 26.

Institute for Diagnostic and Interventional Neuroradiology, University Hospital, LMU Munich, 81377 Munich, Germany.

Purpose: To evaluate technical outcome, diagnostic yield and safety of computed tomographic fluoroscopy-guided percutaneous core needle biopsies in patients with mediastinal masses.

Methods: Overall, 155 CT fluoroscopy-guided mediastinal core needle biopsies, performed from March 2010 to June 2020 were included. Size of lesion, size of needle, access path, number of success, number of biopsies per session, diagnostic yield, patient's position, effective dose, rate of complications, tumor localization, size of tumor and histopathological diagnosis were considered. Read More

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Malignant Melanoma in a Long-legged Buzzard (): Characterization of Clinical and Histologic Lesions.

J Avian Med Surg 2021 Apr;35(1):80-85

ZooParc de Beauval & Beauval Nature, Route du Blanc, 41110 Saint Aignan sur Cher, France.

A 17-year-old, male long-legged buzzard () presented for acute lethargy and black gelatinous tissue in both nostrils. Despite intensive care, the bird died within 2 days. A postmortem computed tomographic scan of the head revealed a complete obstruction of the rostral infraorbital sinus, later confirmed by necropsy. Read More

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The integrated diagnostic suite of the C-2W experimental field-reversed configuration device and its applications.

Rev Sci Instrum 2021 Mar;92(3):033548

TAE Technologies, Inc., 19631 Pauling, Foothill Ranch, California 92610, USA.

In the current experimental device of TAE Technologies, C-2W (also called "Norman"), record breaking advanced beam-driven field-reversed configuration (FRC) plasmas are produced and sustained in steady state utilizing variable energy neutral beams (15-40 keV, total power up to 20 MW), advanced divertors, bias electrodes, and an active plasma control system. This fully operational experiment is coupled with a fully operational suite of advanced diagnostic systems. The suite consists of 60+ individual systems spanning 20 categories, including magnetic sensors, Thomson scattering, interferometry/polarimetry, spectroscopy, fast imaging, bolometry, reflectometry, charged and neutral particle analysis, fusion product detection, and electric probes. Read More

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Metasurface-Enhanced Antennas for Microwave Brain Imaging.

Diagnostics (Basel) 2021 Mar 3;11(3). Epub 2021 Mar 3.

Faculty of Natural and Mathematical Sciences, King's College London, Strand, London WC2R 2LS, UK.

Stroke is a very frequent disorder and one of the major leading causes of death and disability worldwide. Timely detection of stroke is essential in order to select and perform the correct treatment strategy. Thus, the use of an efficient imaging method for an early diagnosis of this syndrome could result in an increased survival's rate. Read More

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Synchrotron Radiation-Based Refraction-Contrast Tomographic Images Using X-ray Dark-Field Imaging Optics in Human Lung Adenocarcinoma and Histologic Correlations.

Diagnostics (Basel) 2021 Mar 10;11(3). Epub 2021 Mar 10.

Department of Thoracic and Cardiovascular Surgery, Soonchunhyang University Gumi Hospital, Gumi 39371, Korea.

The aim of this study was to evaluate the clinical implication of synchrotron radiation imaging techniques for human lung adenocarcinoma in comparison with pathologic examination. A refraction-based tomographic imaging technique called the X-ray dark-field imaging (XDFI) method was used to obtain computed tomographic images of human lung adenocarcinoma at the beam line at Photon Factory BL 14B at the High Energy Accelerator Research Organization (KEK) in Tsukuba, Japan. Images of normal lung tissue were also obtained using the same methods and reconstructed as 3D images. Read More

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Clinical and laboratory findings in COVID-19 adult hospitalized patients from Alborz province / Iran: comparison of rRT-PCR positive and negative.

BMC Infect Dis 2021 Mar 11;21(1):256. Epub 2021 Mar 11.

Department of Applied Cell Sciences, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.

Background: The novel coronavirus disease 2019 (COVID-19) was emergency turned into global public health after the first patients were detected in Wuhan, China, in December 2019. The disease rapidly expanded and led to an epidemic throughout China, followed by the rising number of cases worldwide. Given the high prevalence of COVID-19, rapid and accurate diagnostic methods are immediately needed to identify, isolate and treat the patients as soon as possible, decreasing mortality rates and the risk of public contamination by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2). Read More

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Hip Adductor Longus Tendon Origin Anatomy Is Consistent and May Inform Surgical Reattachment.

Arthrosc Sports Med Rehabil 2021 Feb 1;3(1):e227-e232. Epub 2021 Feb 1.

Cedars Sinai Kerlan-Jobe Orthopaedic Institute, Los Angeles, California, U.S.A.

Purpose: To define the topographic anatomy of the footprint of the adductor longus origin on the pubis and its underlying bony morphology to better inform surgical repair of adductor longus tendon injuries.

Methods: Five cadaveric pelvis specimens were dissected, making 10 adductor footprints available for analysis. The adductor longus tendon origin was isolated and the surrounding tissue debrided. Read More

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February 2021

Possibilities of Automated Diagnostics of Odontogenic Sinusitis According to the Computer Tomography Data.

Sensors (Basel) 2021 Feb 8;21(4). Epub 2021 Feb 8.

Institute of Information and Computational Technologies CS MES RK, Almaty 050010, Kazakhstan.

Individual anatomical features of the paranasal sinuses and dentoalveolar system, the complexity of physiological and pathophysiological processes in this area, and the absence of actual standards of the norm and typical pathologies lead to the fact that differential diagnosis and assessment of the severity of the course of odontogenic sinusitis significantly depend on the measurement methods of significant indicators and have significant variability. Therefore, an urgent task is to expand the diagnostic capabilities of existing research methods, study the significance of the measured indicators, and substantiate the expediency of their use in the diagnosis of specific pathologies in an automated mode. Methods of digital filtering, image segmentation and analysis, fluid dynamics, and statistical and discriminant analysis were used. Read More

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February 2021

[Fusion of mammography and ultrasonography].

Radiologe 2021 Feb 15;61(2):166-169. Epub 2021 Jan 15.

Frauenklinik, Universitätsklinikum Erlangen, Comprehensive Cancer Center Erlangen-EMN, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsstraße 21-23, 91054, Erlangen, Deutschland.

Standard Radiological Procedures: Currently, the combination of mammography and sonography is the gold standard in breast diagnostics. If there are any uncertainties, further examinations such as breast magnetic resonance imaging (MRI) and, in studies, computer tomographic procedures can be used. These investigations are carried out separately. Read More

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February 2021

Artificial Intelligence for Fast and Accurate 3-Dimensional Tooth Segmentation on Cone-beam Computed Tomography.

J Endod 2021 May 9;47(5):827-835. Epub 2021 Jan 9.

OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium; Oral Facial Diagnostics and Surgery, Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden.

Introduction: Tooth segmentation on cone-beam computed tomographic (CBCT) imaging is a labor-intensive task considering the limited contrast resolution and potential disturbance by various artifacts. Fully automated tooth segmentation cannot be achieved by merely relying on CBCT intensity variations. This study aimed to develop and validate an artificial intelligence (AI)-driven tool for automated tooth segmentation on CBCT imaging. Read More

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Cardiovascular magnetic resonance imaging: emerging techniques and applications.

Heart 2021 May 5;107(9):697-704. Epub 2021 Jan 5.

Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, West Yorkshire, UK

This review gives examples of emerging cardiovascular magnetic resonance (CMR) techniques and applications that have the potential to transition from research to clinical application in the near future. Four-dimensional flow CMR (4D-flow CMR) allows time-resolved three-directional, three-dimensional (3D) velocity-encoded phase-contrast imaging for 3D visualisation and quantification of valvular or intracavity flow. Acquisition times of under 10 min are achievable for a whole heart multidirectional data set and commercial software packages are now available for data analysis, making 4D-flow CMR feasible for inclusion in clinical imaging protocols. Read More

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Determining Progression in Ectatic Corneal Disease.

Asia Pac J Ophthalmol (Phila) 2020 Dec;9(6):541-548

University of Geneva, Geneva, Switzerland.

Before the advent of modern tomographic imaging and corneal cross-linking (CXL), diagnosis and treatment of ectatic disease were limited to disease severity where changes on the anterior corneal surface lead to visual complaints. Rigid contact lenses and/or penetrating keratoplasty addressed late stage disease, as identifying early or subclinical disease was not possible, or its need appreciated. The emergence of CXL as a viable treatment to alter the natural progression of keratoconus heightened the need for improved diagnostics. Read More

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December 2020

Bayesian Inference Associates Rare Variants with Specific Phenotypes in Pulmonary Arterial Hypertension.

Circ Genom Precis Med 2020 Dec 15. Epub 2020 Dec 15.

Université Paris-Sud, Faculté de Médecine, Université Paris-Saclay & AP-HP, Service de Pneumologie, Centre de référence de l'hypertension pulmonaire & INSERM UMR_S 999, Hôpital Bicêtre, Le Kremlin-Bicêtre, Paris, France.

- Approximately 25% of patients with pulmonary arterial hypertension (PAH) have been found to harbor rare mutations in disease-causing genes. To identify missing heritability in PAH we integrated deep phenotyping with whole-genome sequencing data using Bayesian statistics. - We analyzed 13,037 participants enrolled in the NIHR BioResource - Rare Diseases (NBR) study, of which 1,148 were recruited to the PAH domain. Read More

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December 2020

Arthroscopic removal of a solitary osteochondroma interfering with the podotrochlear apparatus in a foal.

Vet Surg 2021 Jul 14;50 Suppl 1:O128-O137. Epub 2020 Oct 14.

Equine Veterinary Medical Center, A Member of Qatar Foundation, Al Shaqab street, Al Rayyan, Doha, Qatar.

Objective: To report the diagnostics, surgical treatment, and outcome of a juvenile foal with solitary osteochondroma (SO) interfering with the podotrochlear apparatus.

Study Design: Case report ANIMAL: One 36-day-old Arabian colt.

Methods: Clinical, radiographic, ultrasonographic, computed tomographic, and histopathologic examinations were required to characterize and treat an SO located at the palmar aspect of the diaphysis of the second phalanx of the left forelimb. Read More

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New murmur.

Heart 2020 12;106(24):1926-1952

Cardiology, Royal Gwent Hospital, Aneurin Bevan University Health Board, Newport, UK.

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December 2020