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Igaku Butsuri : Nihon Igaku Butsuri... 2021IVR-CT was developed at Aichi Cancer Center (Japan) in 1992 and is now in use worldwide. It was developed initially for the purpose of performing CT more easily during... (Review)
Review
IVR-CT was developed at Aichi Cancer Center (Japan) in 1992 and is now in use worldwide. It was developed initially for the purpose of performing CT more easily during arteriography, but also during non-vascular IR procedures such as biopsy and drainage. Four-detector-row IVR-MDCT was introduced to Shizuoka Cancer center in 2002, which was upgraded to 320-Row IVR-ADCT (320-IVR-CT) by 2013. Although we performed an initial investigation into the efficacy of 320 IVR-CT for vascular intervention, the direct MPR method using volume scanning is predominant in the field of non-vascular intervention. In this review, we describe the history of IVR-CT, report the efficacy of 320-IVR-CT for vascular and non-vascular intervention, and report our experiences.
Topics: Angiography; Humans; Japan
PubMed: 34744140
DOI: 10.11323/jjmp.41.3_92 -
Neuroscience Oct 2021Diagnosis of cerebrovascular disease includes vascular neuroimaging techniques such as computed tomography (CT) angiography, magnetic resonance (MR) angiography (with or... (Review)
Review
Diagnosis of cerebrovascular disease includes vascular neuroimaging techniques such as computed tomography (CT) angiography, magnetic resonance (MR) angiography (with or without use of contrast agents) and catheter digital subtraction angiography (DSA). These techniques provide mostly information about the vessel lumen. Vessel wall imaging with MR seeks to characterize cerebrovascular pathology, but with resolution that is often insufficient for small lesions. Intravascular imaging techniques such as ultrasound and optical coherence tomography (OCT), used for over a decade in the peripheral circulation, is not amendable to routine deployment in the intracranial circulation due to vessel caliber and tortuosity. However, advances in OCT technology including the probe profile, stiffness and unique distal rotation solution, holds the promise for eventual translation of OCT into the clinical arena. As such, it is apropos to review this technology and present the rationale for utilization of OCT in the cerebrovasculature.
Topics: Angiography, Digital Subtraction; Contrast Media; Humans; Intracranial Aneurysm; Magnetic Resonance Angiography; Tomography, Optical Coherence
PubMed: 34126186
DOI: 10.1016/j.neuroscience.2021.06.008 -
Cardiovascular and Interventional... Nov 2022Radioembolisation is an established transarterial therapy for hepatocellular carcinoma and liver metastasis. Success of radioembolisation depends on meticulous... (Review)
Review
Radioembolisation is an established transarterial therapy for hepatocellular carcinoma and liver metastasis. Success of radioembolisation depends on meticulous angiography and accurate dosimetry. Intra-procedure catheter-directed CT-angiography is commonly performed to improve the efficacy and safety of radioembolisation. This review article will (1) introduce the differences between cone beam CT and hybrid angiography-CT, and (2) describe the benefits of catheter-directed CT-angiography in radioembolisation from both an interventional radiology and nuclear medicine perspective.
Topics: Humans; Yttrium Radioisotopes; Carcinoma, Hepatocellular; Liver Neoplasms; Computed Tomography Angiography; Angiography; Catheters
PubMed: 35595985
DOI: 10.1007/s00270-022-03157-4 -
Clinical Anatomy (New York, N.Y.) Nov 2022The number of studies on the anatomy of the costocervical trunk (CCT) is scarce, and the actual prevalence of this structure is unknown. Therefore, the authors of the... (Review)
Review
The number of studies on the anatomy of the costocervical trunk (CCT) is scarce, and the actual prevalence of this structure is unknown. Therefore, the authors of the present study would like to propose a set of four types of CCT, which were created based on observations of computed tomography angiographies (75 CCTs). A retrospective study was conducted to establish variations and the morphometric properties of the CCT. The results of 55 consecutive patients who underwent neck and thoracic computed tomography angiography (CTA) were analyzed in March 2022. The analysis was performed on a total of 75 CCTs. Of these, 32 were from women (42.7%) and 43 were from men (57.3%). Branching variations of each CCT were thoroughly analyzed. A classification of the branching pattern of the CCTs was made and consisted of four types. In the present study, the variety of branching and morphology of CCT was analyzed, proposing its novel classification based on the four most frequently observed types. Type 1 was the most prevalent (76.1%), having a similar origin and branching pattern as described in the major anatomical books. CCT was found to be absent in 23.94% of the cases, making it a somewhat less consistent branch of the SA. Understanding the variability of the anatomy of the CCT can be a great tool for physicians performing endovascular procedures in the cervical region.
Topics: Angiography; Female; Humans; Male; Neck; Retrospective Studies; Subclavian Artery; Tomography, X-Ray Computed
PubMed: 35796160
DOI: 10.1002/ca.23929 -
Cardiovascular Revascularization... Mar 2024
Topics: Humans; Angiography
PubMed: 37867121
DOI: 10.1016/j.carrev.2023.10.011 -
IEEE Transactions on Medical Imaging Apr 2023Optical Coherence Tomography Angiography (OCTA), a functional extension of OCT, has the potential to replace most invasive fluorescein angiography (FA) exams in...
Optical Coherence Tomography Angiography (OCTA), a functional extension of OCT, has the potential to replace most invasive fluorescein angiography (FA) exams in ophthalmology. So far, OCTA's field of view is however still lacking behind fluorescence fundus photography techniques. This is problematic, because many retinal diseases manifest at an early stage by changes of the peripheral retinal capillary network. It is therefore desirable to expand OCTA's field of view to match that of ultra-widefield fundus cameras. We present a custom developed clinical high-speed swept-source OCT (SS-OCT) system operating at an acquisition rate 8-16 times faster than today's state-of-the-art commercially available OCTA devices. Its speed allows us to capture ultra-wide fields of view of up to 90 degrees with an unprecedented sampling density and hence extraordinary resolution by merging two single shot scans with 60 degrees in diameter. To further enhance the visual appearance of the angiograms, we developed for the first time a three-dimensional deep learning based algorithm for denoising volumetric OCTA data sets. We showcase its imaging performance and clinical usability by presenting images of patients suffering from diabetic retinopathy.
Topics: Humans; Diabetic Retinopathy; Fluorescein Angiography; Retinal Diseases; Retinal Vessels; Tomography, Optical Coherence; Angiography; Ophthalmology
PubMed: 36383595
DOI: 10.1109/TMI.2022.3222638 -
Current Opinion in Ophthalmology Jul 2023Optical coherence tomography angiography (OCTA) is a novel, noninvasive imaging technique, which provides depth resolved visualization of microvasculature of the retina... (Review)
Review
PURPOSE OF REVIEW
Optical coherence tomography angiography (OCTA) is a novel, noninvasive imaging technique, which provides depth resolved visualization of microvasculature of the retina and choroid. Although OCTA has been widely used for the evaluation of a number of retinal diseases, its use in the field of neuro-ophthalmology has been less studied. In this review, we provide an update on the utility of OCTA in neuro-ophthalmic conditions.
RECENT FINDINGS
Peripapillary and macular microvasculature analyses have indicated that OCTA can be a promising tool for early detection of a number of neuro-ophthalmic diseases, differential diagnosis, and monitoring of disease progression. Recent studies have demonstrated that structural and functional impairment can develop at early stages in some conditions such as in multiple sclerosis and Alzheimer's disease even in the absence of overt clinical symptoms. Furthermore, this dye-less technique can be a valuable adjunct tool in the detection of complications commonly seen in some congenital entities such optic disc drusen.
SUMMARY
Since its introduction, OCTA has emerged as an important imaging approach shedding light on unrevealed pathophysiological mechanisms of several ocular diseases. The use of OCTA as a biomarker in the field of neuro-ophthalmology has recently gained considerable attention with studies supporting its role in clinical setting while larger studies are warranted for correlating these findings with traditional diagnostic procedures and clinical features and outcomes.
Topics: Humans; Tomography, Optical Coherence; Ophthalmology; Angiography; Retina; Retinal Diseases; Fluorescein Angiography; Retinal Vessels
PubMed: 37070535
DOI: 10.1097/ICU.0000000000000955 -
Handbook of Clinical Neurology 2021As a refresher course on current techniques and practice of cerebral angiography, this chapter outlines the steps in effective angiography, incorporating modern quality... (Review)
Review
As a refresher course on current techniques and practice of cerebral angiography, this chapter outlines the steps in effective angiography, incorporating modern quality and safety considerations. The format is step-by-step from preprocedure to intraprocedure to postprocedure for ease of reference. The chapter will serve as a framework for the fledgling angiographer, augmenting the important teaching provided by a seasoned angiographer.
Topics: Cerebral Angiography; Humans
PubMed: 33272391
DOI: 10.1016/B978-0-444-64034-5.00006-7 -
Radiologic Clinics of North America Jan 2023Peripheral vascular injuries are a rare finding in the setting of trauma but an important source of morbidity and mortality when present. Fast and accurate diagnosis... (Review)
Review
Peripheral vascular injuries are a rare finding in the setting of trauma but an important source of morbidity and mortality when present. Fast and accurate diagnosis followed by rapid repair of vascular injuries are important for achieving the best clinical outcomes. The advancements in computer tomography (CT) and decades of experience in vascular imaging have allowed radiologists to become important contributors for the diagnosis and characterization of peripheral vascular injury. We review the epidemiology of peripheral vascular injuries, indications for imaging, ways to optimize CT technique, imaging findings, and common challenges for accurate diagnosis of such injuries.
Topics: Humans; Vascular System Injuries; Computed Tomography Angiography; Tomography, X-Ray Computed; Angiography; Computers
PubMed: 36336387
DOI: 10.1016/j.rcl.2022.08.006 -
Circulation. Cardiovascular Imaging Jul 2023Currently, noninvasive arteriography for the diagnosis of coronary artery disease is clinically limited to the computed tomography scanning, where patients have to be...
BACKGROUND
Currently, noninvasive arteriography for the diagnosis of coronary artery disease is clinically limited to the computed tomography scanning, where patients have to be exposed to the radiation and risks associated with iodinated contrast. We aimed to investigate the diagnostic performance and safety of a novel ferumoxytol-enhanced coronary magnetic resonance angiography (CMRA) in patients with suspected coronary artery disease.
METHODS
Thirty patients, 19 males, with a median age of 63 years old, and 17 with renal insufficiency, who were scheduled for invasive coronary angiography, were enrolled. Ferumoxytol was administered intravenously with a dose of 3 mg/kg during CMRA. Images were acquired with an ECG-triggered, navigator-gated, inversion recovery-prepared 3D fast low-angle shot sequence, and the image quality was assessed by a 4-point scale. Eighteen-segment coronary artery model was adopted to evaluate the visibility of the coronary arteries, and the image quality and stenosis were evaluated in nine segments. The diagnostic performance of CMRA is described as sensitivity, specificity, positive and negative predictive values, and accuracy with the invasive coronary angiography results as reference. The patients' vital signs were monitored during CMRA, and their hepatic and renal functions were followed up for 3 months to evaluate the safety of ferumoxytol.
RESULTS
Two hundred fifty-two of the 270 study segments were identified by CMRA, and their quality score reached 3.6±0.7. Referring to the invasive coronary angiography results, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of ferumoxytol-enhanced CMRA reached 100.0%, 66.7%, 92.3%, 100.0%, and 93.3% respectively in patient-based analysis; 91.4%, 90.9%, 86.5%, 94.3%, and 91.1%, respectively in vessel-based analysis; and 92.3%, 96.7%, 83.7%, 98.6%, and 96.0%, respectively in segment-based analysis. No ferumoxytol-related adverse event was observed during the 3-month follow-up.
CONCLUSIONS
Ferumoxytol-enhanced CMRA demonstrated good diagnostic performance and excellent safety in the diagnosis of significant coronary stenosis, providing an alternative to coronary computed tomography angiography for the diagnosis of coronary artery disease.
REGISTRATION
URL: https://www.
CLINICALTRIALS
gov; Unique identifier: NCT05032937.
Topics: Male; Humans; Middle Aged; Coronary Artery Disease; Magnetic Resonance Angiography; Ferrosoferric Oxide; Heart; Coronary Angiography; Coronary Stenosis; Coronary Vessels; Predictive Value of Tests
PubMed: 37463240
DOI: 10.1161/CIRCIMAGING.123.015404