38,683 results match your criteria computed tomographic

Recent Trends in Artificial Intelligence-Assisted Coronary Atherosclerotic Plaque Characterization.

Int J Environ Res Public Health 2021 Sep 23;18(19). Epub 2021 Sep 23.

School of Engineering, Ngee Ann Polytechnic, Clementi 599489, Singapore.

Coronary artery disease is a major cause of morbidity and mortality worldwide. Its underlying histopathology is the atherosclerotic plaque, which comprises lipid, fibrous and-when chronic-calcium components. Intravascular ultrasound (IVUS) and intravascular optical coherence tomography (IVOCT) performed during invasive coronary angiography are reference standards for characterizing the atherosclerotic plaque. Read More

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September 2021

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

A micro-computed tomographic analysis of obturation quality and retreatability of an epoxy resin-based sealer.

Minerva Dent Oral Sci 2021 Oct 11. Epub 2021 Oct 11.

Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy.

Background: To evaluate the voids percentage and the retreatability by different supplementary irrigation techniques of a matched-taper single cone and epoxy resin-based sealer.

Methods: A total of 72 single-rooted premolars were prepared and filled with gutta-percha and MM-Seal. The percentage of voids in the whole root canal and each anatomical part were evaluated by Micro-CT scans. Read More

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October 2021

Developing a model for estimating infarction onset time based on computed tomography radiomics in patients with acute middle cerebral artery occlusion.

BMC Med Imaging 2021 Oct 11;21(1):147. Epub 2021 Oct 11.

Department of Radiology, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, China.

Background: Radiomics analysis is a newly emerging quantitative image analysis technique. The aim of this study was to extract a radiomics signature from the computed tomography (CT) imaging to determine the infarction onset time in patients with acute middle cerebral artery occlusion (MCAO).

Methods: A total of 123 patients with acute MCAO in the M1 segment (85 patients in the development cohort and 38 patients in the validation cohort) were enrolled in the present study. Read More

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October 2021

Bowel habits and gender correlate with colon length measured by CT colonography.

Jpn J Radiol 2021 Oct 11. Epub 2021 Oct 11.

Department of Coloproctology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu, Fukushima, 969-3492, Japan.

Purpose: CT colonography enables three-dimensional measurement of colon length. However, previous studies using CT colonography have not examined the association with gender, age, physique, a history of laparotomy and bowel habits, all possible contributory factors to colon length. The aim of this study is to investigate factors associated with colon length. Read More

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October 2021

Utility of Computed Tomographic Angiography for Pulmonary Hypertension Assessment in a Cohort of West Highland White Terriers With or Without Canine Idiopathic Pulmonary Fibrosis.

Front Vet Sci 2021 23;8:732133. Epub 2021 Sep 23.

Department of Clinical Sciences, Companion Animals, Faculty of Veterinary Medicine, Fundamental and Applied Research for Animals & Health (FARAH), University of Liège, Liège, Belgium.

West Highland white terriers (WHWTs) affected with canine idiopathic pulmonary fibrosis (CIPF) are at risk of developing precapillary pulmonary hypertension (PH). In humans, thoracic computed tomography angiography (CTA) is commonly used to diagnose and monitor patients with lower airway diseases. In such patients, CTA helps to identify comorbidities, such as PH, that could negatively impact prognosis. Read More

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September 2021

A discrepancy between CT angiography and transesophageal echocardiographic measurements of the annular size affect long-term survival following trans-catheter aortic valve replacement.

J Cardiovasc Thorac Res 2021 25;13(3):208-215. Epub 2021 Aug 25.

Department of Anesthesiology, University at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY, USA.

Accurate measurement of the aortic valve annulus is critical for proper valve sizing for the transcatheter aortic valve replacement (TAVR) procedure. While computed tomography angiography (CTA) is the widely-accepted standard, two-dimensional (2D) and three-dimensional(3D) transesophageal echocardiography (TEE) is commonly performed to measure the size of the aortic valve and to verify appropriate seating of prostheses. Patients undergoing TAVR between 2013-2015 were examined. Read More

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Multiple periapical dysplasias analyzed by cone-beam-computer tomography and Tcm-Scintigraphy.

Radiol Case Rep 2021 Dec 2;16(12):3757-3765. Epub 2021 Oct 2.

Department of Oral and Maxillofacial Surgery, University Hospital "Carl Gustav Carus", Technische Universität Dresden, Dresden, Germany.

Periapical cemental dysplasia (PCD) is considered a non-neoplastic proliferation of fibrous tissues and cementum-like hard tissues, usually occurring in the periapical regions of teeth. PCD is characterized by the presence of vital pulp and is often accidentally discovered during a general radiographic survey. PCD may arise from the tissue of odontogenic origin or occur as a reactive process in the periapical tissue. Read More

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December 2021

Carotid computed tomography angiography after cobalt-based alloy carotid artery stenting using ultra-high-resolution computed tomography with model-based iterative reconstruction.

Radiol Case Rep 2021 Dec 2;16(12):3721-3728. Epub 2021 Oct 2.

Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Sendai, Japan.

In conventional carotid computed tomographic angiography, the artifacts of the stent vary depending on the structure and characteristics of the alloy type. Cobalt-based alloy stents have been reported to exhibit high artifacts, and accurate evaluation of the internal lumen can be difficult. Recently, ultra-high-resolution computed tomography scanner systems have become available for clinical practice. Read More

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December 2021

Clinicopathological and computed tomographic features associated with occult lymph node metastasis in patients with peripheral solid non-small cell lung cancer.

Eur J Radiol 2021 Sep 27;144:109981. Epub 2021 Sep 27.

Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, No.1 Youyi Road, Yuzhong District, Chongqing 400016, China. Electronic address:

Objectives: To investigate the value of combining clinicopathological characteristics with computed tomographic (CT) features of tumours for predicting occult lymph node metastasis (OLNM) in peripheral solid non-small cell lung cancer (PS-NSCLC).

Methods: The study included 478 NSCLC clinically N0 (cN0) patients who underwent lobectomy and systemic lymph node dissection from January 2014 to August 2019. Patients were classified into OLNM and negative lymph node metastasis (NLNM) groups. Read More

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September 2021

High-resolution high-throughput thermal neutron tomographic imaging of fossiliferous cave breccias from Sumatra.

Sci Rep 2021 Oct 7;11(1):19953. Epub 2021 Oct 7.

Australian Research Centre for Human Evolution, Environmental Futures Research Institute, Griffith University, Brisbane, QLD, 4111, Australia.

We employ high-throughput thermal-neutron tomographic imaging to visualise internal diagnostic features of dense fossiliferous breccia from three Pleistocene cave localities in Sumatra, Indonesia. We demonstrate that these seemingly homogeneous breccias are an excellent source of data to aid in determining taphonomic and depositional histories of complex depositional sites such as tropical caves. X-ray Computed Tomographic (CT) imaging is gaining importance amongst palaeontologists as a non-destructive approach to studying fossil remains. Read More

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October 2021

Reconstruction of vascular blood flow in a vessel from tomographic projections.

Biomed Phys Eng Express 2021 Oct 7. Epub 2021 Oct 7.

CREATIS, 20 avenue Jean Capelle, Villeurbanne, Auvergne-Rhône-Alpes, 69100, FRANCE.

In this work, we study the measurement of blood velocity with contrast enhanced computed tomography. The reconstruction is based on CT projections perpendicular to the main axis of the vessel and on a partial differential equation describing the propagation of the contrast agent. The inverse problem is formulated as an optimal control problem with the transport equation as constraint. Read More

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October 2021

Recent Advances in Multimodality Imaging of the Tricuspid Valve.

Expert Rev Med Devices 2021 Oct 7. Epub 2021 Oct 7.

Department of Cardiac, Istituto Auxologico Italiano, IRCCS, Neurological and Metabolic Sciences, San Luca Hospital, Milan, Italy.

Introduction: The tricuspid valve (TV) and the right heart chambers are complex three-dimensional structures that are difficult to assess using tomographic imaging techniques. The progressive ageing of the general population and the advancements in treating left-sided heart diseases by transcatheter procedures, have contributed to the tricuspid regurgitation (TR) becoming a major public health problem associated with progression to refractory heart failure and poor outcome. Recent advances in multimodality cardiac imaging allow a better understanding of the pathophysiology of TR that may translate in better management of patients. Read More

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October 2021

Whole genome sequencing identifies loci specifically associated with thoracic aortic wall defects and abdominal aortic aneurysms in patients with European ancestry.

JVS Vasc Sci 2020 22;1:233-245. Epub 2020 Oct 22.

Icahn School of Medicine at Mount Sinai, New York, NY.

Objective: The objective of this study was to better understand the pathophysiology and underlying genetic mechanisms behind two abdominal aortic aneurysm (AAA) subtypes using computed tomographic imaging in combination with whole genome sequencing.

Methods: Patients with a known AAA and European ancestry were included in this investigation and underwent genetic and image analysis. Patients with AAAs and indications of descending thoracic aortic pathology (aortic dissection, penetrating aortic ulcers, intramural hematoma, atheromas, ulcerative plaque, and intramural ulceration, and intimal flaps/tears) were classified as having thoracic aortic disease, grouped together, and compared with patients with an AAA and a normal descending thoracic aorta. Read More

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October 2020

Learning implicit light propagation from multi-flame projections for computed tomography of chemiluminescence.

Appl Opt 2021 Aug;60(22):6469-6478

Classic algorithms for computed tomography of chemiluminescence include two main steps: tomographic weight matrix calculation using imaging models, and inverse calculation using algebraic reconstruction techniques (ARTs). However, pre-calculated weight matrices require a large amount of storage, and accurate voxel weights may not be obtained using a simplified imaging model. In this study, we propose a new, to the best of our knowledge, method named the multi-weight encode reconstruction network (Multi-WERNet) to learn the implicit light propagation physics from the multi-projections of different flames and simultaneously reconstruct the 3D flame chemiluminescence. Read More

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Assessment of dens invaginatus and its characteristics in maxillary anterior teeth using cone-beam computed tomography.

Sci Rep 2021 Oct 5;11(1):19727. Epub 2021 Oct 5.

Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.

This cone-beam computed tomographic (CBCT) study aimed to evaluate the prevalence of dens invaginatus (DI) and its characteristics in maxillary anterior teeth in a Saudi population. A total of 505 CBCT scans were evaluated, including a total of 2790 maxillary anterior teeth. The patients' demographic data, including age and sex, were recorded. Read More

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October 2021

Superior mesenteric artery syndrome: An often overlooked cause of abdominal pain!

Saudi Med J 2021 Oct;42(10):1145-1148

From the Department of Radiology Department (Waheed); from the Department of Internal Medicine (Jamal, Amjad); from the Vascular Surgery Department (Mohammed); from the Department of General Surgery (Altaf); from the Radiology Department (Al Bassam, Almutawa), King Fahad Military Medical Complex; from the Vice Deanship of Post-graduate and Research (Arulanantham), Prince Sultan Military College of Health Science, Dahran, Kingdom of Saudi Arabia; and from the Department of Paediatric Surgery (Jan Shah), Sher I Kashmir Institute of Medical Sciences, Srinagar.

Objectives: To determine the prevalence of superior mesenteric artery (SMA) syndrome in patients presenting with abdominal pains, and to evaluate computed tomographic (CT) findings needed for its diagnosis.

Methods: This retrospective record-based study was carried out at the radiology department, from January 2016 to January 2021. All young patients (aged under 25) who underwent CT scans for abdominal pains were reviewed. Read More

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October 2021

[A Case of Primary Renal Angiosarcoma with a Rapidly Worsening Course].

Hinyokika Kiyo 2021 Sep;67(9):413-417

The Department of Urology, Kobe City Nishi-Kobe Medical Center.

A 69-year-old man presented with left flank pain and underwent a computed tomographic scan, which revealed a large left renal mass of 16×9×5 cm. A left nephrectomy was performed. Pathological analysis revealed that the tumor was consistent with angiosarcoma of the left kidney with a negative surgical margin. Read More

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September 2021

Reply: Three-Dimensional Computed Tomographic Study on the Vessels of the Zygomatic Region: Arterial Variations and Clinical Relevance.

Plast Reconstr Surg 2021 Oct 5. Epub 2021 Oct 5.

Department of Plastic and Reconstructive Surgery Guangdong Second Provincial People's Hospital Guangzhou City, People's Republic of China.

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October 2021

Three-Dimensional Computed Tomographic Study on the Vessels of the Zygomatic Region: Arterial Variations and Clinical Relevance.

Jing Liu

Plast Reconstr Surg 2021 Oct 5. Epub 2021 Oct 5.

Department of Cleft Lip and Palate Plastic Surgery Hospital Chinese Academy of Medical Sciences and Peking Union Medical College 33 Badachu Drive Shijingshan District Beijing 100144, People's Republic of China

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October 2021

Computed tomographic staging of dogs with anal sac adenocarcinoma.

J Small Anim Pract 2021 Oct 4. Epub 2021 Oct 4.

Langford Vets, Langford House, Langford, BS40 5DU, UK.

Objectives: To describe the CT appearance of anal sac adenocarcinoma lesions in a population of dogs including the relations between primary tumour, and locoregional and distant metastasis.

Materials And Methods: Retrospective review of dogs with confirmed anal sac adenocarcinoma and available CT images of the thorax, abdomen and pelvis.

Results: A population of 70 dogs were included in the study. Read More

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October 2021

Computed tomographic assessment of lung aeration at different positive end-expiratory pressures in a porcine model of intra-abdominal hypertension and lung injury.

Intensive Care Med Exp 2021 Oct 4;9(1):52. Epub 2021 Oct 4.

School of Human Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, 6009, Australia.

Background: Intra-abdominal hypertension (IAH) is common in critically ill patients and is associated with increased morbidity and mortality. High positive end-expiratory pressures (PEEP) can reverse lung volume and oxygenation decline caused by IAH, but its impact on alveolar overdistension is less clear. We aimed to find a PEEP range that would be high enough to reduce atelectasis, while low enough to minimize alveolar overdistention in the presence of IAH and lung injury. Read More

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October 2021

Lipoprotein(a) and subclinical coronary atherosclerosis in asymptomatic individuals.

Atherosclerosis 2021 Sep 28. Epub 2021 Sep 28.

Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea. Electronic address:

Background And Aims: There are limited data regarding the association between lipoprotein(a) (Lp[a]) and subclinical coronary atherosclerosis. This study investigated the association between Lp(a) and subclinical coronary atherosclerosis detected by coronary computed tomographic angiography (CCTA) in an asymptomatic population.

Methods: We retrospectively analyzed 7201 asymptomatic individuals (mean age 54. Read More

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September 2021

Rapid 3D reconstruction guided embolization for catastrophic bleeding following vacuum assisted breast biopsy; A case report and review of the literature.

Radiol Case Rep 2021 Nov 20;16(11):3593-3596. Epub 2021 Sep 20.

Medical College of Georgia at Augusta University, Department of Radiology, Augusta, GA, USA.

The most clinically significant complication associated with stereotactic core needle biopsy of the breast is hematoma formation, which only occurs in less than 1% of biopsies and may require treatment. Cases of uncontrollable bleeding, refractory to repeated compression, resulting from biopsy are exceedingly rare. We present a case of catastrophic, uncontrollable bleeding and large hematoma formation resulting from stereotactic vacuum-assisted breast biopsy of a breast mass identified in screening mammography. Read More

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November 2021

Prevalence of Vertebral artery anomaly in upper cervical and its surgical implications: a systematic review.

Eur Spine J 2021 Oct 3. Epub 2021 Oct 3.

Shengli Clinical Medical College of Fujian Medical University, Fu Zhou, China.

Background: The presence vertebral artery (VA) abnormalities in the upper cervical may be a potential cause of catastrophic complication in the posterior approach of the upper cervical spine surgery. The aim of this study was to demonstrate the real incidence of the V3 segment anomaly in patients who need upper cervical surgery, and tried to find out the risk factors of V3 segment anomaly to evaluate the necessary of computed tomographic angiography (CTA) for upper cervical surgery.

Method: This systematic review was conducted following the preferred reporting items for systematic reviews and meta-Analyses (PRISMA). Read More

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October 2021

Displacement of lower third molar into floor of mouth: a single institutional experience.

Oral Maxillofac Surg 2021 Oct 1. Epub 2021 Oct 1.

Department of Oral and Maxillofacial Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1Shikata-cho, Kita-ku, Okayama-shi, 700-8525, Japan.

Purpose: The displacement of the tooth/tooth fragment into the floor of mouth sometimes happens during the lower third molar surgery and the patients are usually referred to oral and maxillofacial surgeons. To date, however, there is no consensus how to manage the displaced tooth due to the lack of available data.

Methods: In this study, we have retrospectively analyzed the management of the displaced lower third molar into the floor of mouth. 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

Carotid Cavernous Sinus Fistula with Contralateral Feed Not Diagnosed by Virtual Assessment or by Non-Invasive Vascular Imaging.

Case Rep Ophthalmol 2021 May-Aug;12(2):712-716. Epub 2021 Aug 24.

Interventional Radiology, University of Toronto, Toronto, Ontario, Canada.

A 67-year-old woman had delayed initial diagnosis of her right low flow carotid cavernous fistula (CCF) during the coronavirus disease (COVID-19) pandemic due to difficulty detecting ocular signs via online virtual examinations. Her right eye conjunctival erythema and proptosis with medial rectus enlargement on computed tomography scan was initially misdiagnosed as euthyroid thyroid-associated orbitopathy without lid retraction. She developed vision loss, and increasing episcleral venous congestion and CCF was suspected. Read More

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Chemoembolization for Hepatocellular Carcinoma in Patients With Inferior Vena Caval/Right Atrial Tumor Thrombi Without Hepatic Vein Invasion.

Anticancer Res 2021 Oct;41(10):5241-5247

Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea.

Aim: To clarify the clinical and radiological features of isolated tumor thrombi in the inferior vena cava (IVC)/right atrium in patients with hepatocellular carcinoma (HCC) without hepatic vein invasion.

Patients And Methods: In this retrospective study, from January 2007 to December 2019, a total of 35,163 chemoembolization sessions were performed in 7,704 patients with HCC. Among them, 10 (0. Read More

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October 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