scholarly journals Carotid Artery – Pathology, Plaque Structure – Relationship between Histological Assessment, Color Doppler Ultrasonography and Magnetic Resonance Imaging – Dolichoarteriopathies – Barorreceptors

10.5772/57157 ◽  
2014 ◽  
Author(s):  
Ricardo Luis ◽  
Andrs Mara ◽  
Francisco Azzato ◽  
Jos Milei
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Carotid Artery ◽  
Doppler Ultrasonography ◽  
Color Doppler ◽  
Color Doppler Ultrasonography ◽  
Resonance Imaging ◽  
Histological Assessment ◽  
Structure Relationship

scholarly journals Accuracy of color Doppler ultrasonography and magnetic resonance imaging in diagnosis of placenta accreta: A survey of 82 cases

2017 ◽  
Vol 15 (4) ◽  
pp. 225-230 ◽  
Author(s):  
Sedigheh Ayati ◽  
Leila Pourali ◽  
Masoud Pezeshkirad ◽  
Farokh Seilanian Toosi ◽  
Sirous Nekooei ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Doppler Ultrasonography ◽  
Placenta Accreta ◽  
Color Doppler ◽  
Color Doppler Ultrasonography ◽  
Resonance Imaging

Polyorchidism: color Doppler ultrasonography and magnetic resonance imaging findings

2013 ◽  
Vol 37 (1) ◽  
pp. 189-191 ◽  
Author(s):  
Atilla Arslanoglu ◽  
Sedat Alparslan Tuncel ◽  
Mehmet Hamarat
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Doppler Ultrasonography ◽  
Color Doppler ◽  
Color Doppler Ultrasonography ◽  
Imaging Findings ◽  
Resonance Imaging

scholarly journals AB1102 COLOR DOPPLER ULTRASOUND OF SACROILIAC JOINTS COMPARED WITH MAGNETIC RESONANCE IMAGING IN NON RADIOGRAPHIC SPONDYLOARTHRITIS

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 1840.2-1840
Author(s):  
M. Bouaziz ◽  
D. Ben Nessib ◽  
H. Riahi ◽  
K. Maatallah ◽  
E. Labbene ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ankylosing Spondylitis ◽  
Magnetic Resonance ◽  
Doppler Ultrasonography ◽  
Color Doppler ◽  
Color Doppler Ultrasound ◽  
Resonance Imaging ◽  
Sacroiliac Joints ◽  
Active Sacroiliitis ◽  
Inflammatory Changes

Background:Magnetic resonance imaging (MRI) of sacroiliac joints (SIJ) can assess early inflammatory changes, thus allowing an early diagnosis of spondyloarthritis (SpA). However, its use in clinical practice may be limited by its cost, its duration and its limited availability. In this sense, ultrasound (US) has been suggested as a feasible and easy-to-apply alternative.Objectives:The objective of this study was to evaluate the validity of Color Doppler Ultrasound (CDUS) in early assessment of sacroiliitis, compared to MRI findings as the gold standard.Methods:A cross-sectional prospective monocentric study included patients attending the rheumatology department with suggestive signs of SpA between February 2014 and February 2017. Patients with pelvic radiography showing a confirmed sacroiliitis (grade 3 or 4) were not included. Eligible patients underwent US and MRI of SIJ. US examinations were performed by an experimented musculoskeletal radiologist blinded to MRI results. Vascularization within the SIJs was explored by the presence of a CDUS. When an artery was found, the resistive index (RI) was measured. The values of the RI ranged between 0 and 1. Doppler of each SIJ was considered as positive when RI was <0.75.Results:Forty-three patients were included: 10 men and 33 women, with an average age at inclusion of 40.2 ± 11.1 years [17-59]. The mean duration of symptoms was 46±37.5 months [6.6-180]. A personal history of uveitis was noted in 3 patients and of chronic diarrhea in 3 patients. Morning stiffness was noted in 72% (n=31) of patients. Good response to nonsteroidal anti-inflammatory drugs (NSAIDs) and to physical activity were respectively reported by 41.8% (n=18) and 58% (n=25) of patients. Sacroiliac compression test, distraction provocative test, sacral thrust test, Gaenslen’s test, Faber’s test (Patrick) and Mennel’s test were respectively positive in 39.5%, 32.5%, 48.8%, 23.2%, 32.5%, and 51.2% of the patients. Twenty-seven per cent of the patients were HLA-B27+. The MRI showed a confirmed sacroiliitis in 14 patients. Doppler signal was detected in 44 SIJ of 25 patients, of whom 14 SIJ of 8 patients showed bone marrow edema at MRI (p=0.054). At the joint level, considering MRI-proven sacroiliitis as the diagnostic standard, CDUS had a sensitivity of 70%, a specificity of 54.5%, a positive predictive value of 31.8%, and a negative predictive value of 85.7%. The spectral Doppler RI, averagely estimated at 0.74±0.12 [0.48-0.87], was not associated with the presence of sacroiliitis on MRI (p=0.747).Conclusion:US, an imaging technique increasingly used in the assessment of musculoskeletal diseases, has been suggested to detect active sacroiliitis [1, 2]. Our study revealed that in early SpA, CDUS may be useful to assess active inflammatory changes of SIJ since it had a sensitivity of 70%, despite a relatively reduced specificity. However, RI values, which are expected to be low in patients with active inflammation [3], were unrelated to the presence of sacroiliitis. Future studies on larger numbers of patients might be conducted to complete previous data.References:[1]Mohammadi A, Ghasemi-rad M, Aghdashi M, et al (2013) Evaluation of disease activity in ankylosing spondylitis; diagnostic value of color Doppler ultrasonography. Skeletal Radiol 42:219–224.https://doi.org/10.1007/s00256-012-1412-7[2]Hu Z, Xu M, Wang Q, et al (2015) Colour Doppler ultrasonography can be used to detect the changes of sacroiliitis and peripheral enthesitis in patients with ankylosing spondylitis during adalimumab treatment. Clin Exp Rheumatol 33:844–850[3]Arslan H, Sakarya ME, Adak B, et al (1999) Duplex and color Doppler sonographic findings in active sacroiliitis. AJR Am J Roentgenol 173:677–680.https://doi.org/10.2214/ajr.173.3.10470902Disclosure of Interests:None declared

A case of prenatal diagnosis of corpus callosum lipoma

2020 ◽  
Author(s):  
A.I. Zamiatina, M.V. Medvedev
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Prenatal Diagnosis ◽  
Magnetic Resonance ◽  
Corpus Callosum ◽  
Color Doppler ◽  
Septum Pellucidum ◽  
Resonance Imaging

A case of prenatal diagnosis of the corpus callosum lipoma at 32–33 weeks of gestation is presented. In a consultative examination, a hyperechoic formation with clear contours was found in the projection of the septum pellucidum, occupying the rostrum, genu, and truncus of corpus callosum, without signs of intratumorally blood flow in the color Doppler mapping mode. The prenatal diagnosis of "callosum lipoma" was established, confirmed after the birth of a child during magnetic resonance imaging.

scholarly journals Development of Molecular Magnetic Resonance Imaging Tools for Risk Stratification of Carotid Atherosclerotic Disease Using Dual-Targeted Microparticles of Iron Oxide

2021 ◽  
Author(s):  
Joyce M. S. Chan ◽  
Park Sung Jin ◽  
Michael Ng ◽  
Joanne Garnell ◽  
Chan Wan Ying ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Iron Oxide ◽  
High Risk ◽  
Magnetic Resonance ◽  
Carotid Artery ◽  
Risk Stratification ◽  
Stroke Prevention ◽  
Inflammatory Activity ◽  
Resonance Imaging ◽  
Inflammatory Status

AbstractIdentification of patients with high-risk asymptomatic carotid plaques remains a challenging but crucial step in stroke prevention. Inflammation is the key factor that drives plaque instability. Currently, there is no imaging tool in routine clinical practice to assess the inflammatory status within atherosclerotic plaques. We have developed a molecular magnetic resonance imaging (MRI) tool to quantitatively report the inflammatory activity in atherosclerosis using dual-targeted microparticles of iron oxide (DT-MPIO) against P-selectin and VCAM-1 as a smart MRI probe. A periarterial cuff was used to generate plaques with varying degree of phenotypes, inflammation and risk levels at specific locations along the same single carotid artery in an Apolipoprotein-E-deficient mouse model. Using this platform, we demonstrated that in vivo DT-MPIO-enhanced MRI can (i) target high-risk vulnerable plaques, (ii) differentiate the heterogeneity (i.e. high vs intermediate vs low-risk plaques) within the asymptomatic plaque population and (iii) quantitatively report the inflammatory activity of local plaques in carotid artery. This novel molecular MRI tool may allow characterisation of plaque vulnerability and quantitative reporting of inflammatory status in atherosclerosis. This would permit accurate risk stratification by identifying high-risk asymptomatic individual patients for prophylactic carotid intervention, expediting early stroke prevention and paving the way for personalised management of carotid atherosclerotic disease.

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