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1.
In. Huart Sottolano, Regina Natalia; Biafore, Federico. Imagen por resonancia magnética desde cero: manual para estudiantes y docentes. Montevideo, Oficina del Libro-FEFMUR, c2023. p.95-100, ilus.
Monography in Spanish | LILACS, UY-BNMED, BNUY | ID: biblio-1437709
3.
J. vasc. bras ; 21: e20210013, 2022. graf
Article in Portuguese | LILACS | ID: biblio-1365068

ABSTRACT

Resumo A trombose de veia porta (TVP) é uma doença na qual ocorre trombose desde os ramos intra-hepáticos da veia porta, podendo se estender até a veia esplênica e/ou veia mesentérica superior, estando associada, na maioria das vezes, à cirrose hepática. A TVP não associada a cirrose é rara. O objetivo deste artigo foi relatar dois casos de TVP não associados à cirrose, que foram tratados com anticoagulação e tiveram evolução clínica satisfatória.


Abstract Portal vein thrombosis (PVT) is a disease in which thrombosis occurs from the intrahepatic branches of the portal vein, and may extend to the splenic vein and/or superior mesenteric vein. It is most often associated with liver cirrhosis. PVT not associated with cirrhosis is rare. The aim of this article is to report two cases of PVT in which it was not associated with cirrhosis. Both were treated with anticoagulation and clinical progress afterwards was good.


Subject(s)
Humans , Male , Female , Middle Aged , Aged , Portal Vein/pathology , Mesenteric Ischemia/therapy , Magnetic Resonance Angiography , Mesenteric Ischemia/diagnostic imaging , Computed Tomography Angiography , Anticoagulants/therapeutic use
4.
Rev. chil. cardiol ; 40(1): 65-67, abr. 2021. ilus
Article in Spanish | LILACS | ID: biblio-1388080

ABSTRACT

Abstract A 63 year-old-male was admitted with a non-ST-segment elevation acute coronary syndrome. Due to poor acoustic windows ventricular function could not be evaluated by echocardiography. Magnetic resonance (CMR) revealed normal biventricular size and function without fibro- sis and portraying a rare finding consisting of a tubular structure originated in the aortic root following a retro aortic course between the aorta and left atrium, traversing through the atrioventricular groove. These characteristics raised the suspicion of an anomalous coronary artery origin. Coronary angiography confirmed the presence of two coronary arteries, the right coronary artery (RCA) and the left circumflex artery (LCx) originating from the right coronary sinus via two separate ostia. The LCx followed a retro aortic course proximally be- fore irrigating the left ventricular lateral wall. From the left coronary sinus, the left anterior descending artery followed its normal course with a thin diagonal vessel that presented an acute plaque. Due to these low-risk findings, medical management was chosen.


Subject(s)
Humans , Male , Middle Aged , Magnetic Resonance Angiography , Coronary Vessel Anomalies/diagnostic imaging , Coronary Angiography
5.
Rev. colomb. cardiol ; 28(2): 160-170, mar.-abr. 2021. tab, graf
Article in English | LILACS, COLNAL | ID: biblio-1341278

ABSTRACT

Abstract Background: cardiovascular diseases are among the principal causes of mortality and morbidity worldwide. Prevention, early diagnosis and treatment can play an important role in reducing complication of cardiovascular diseases. Objectives: Considering increasing popularity of cardiac computed tomography CT angiography (CTA) in one side and also magnetic esonance angiography (MRA) as gold standard modality on the other side, we decided to perform this meta-analysis study to compare cardiac CTA and MRA in evaluating left ventricular volumes. Method: this study is a systematic review in which we included all studies with inclusion criteria and without exclusion criteria up to 30 December, 2019. Studies were selected after searching on different databases and articles in bibliography of included studies. Obtained studies were screened for quality. Required data were extracted and were then analyzed via STATA 11 statistical package. Results: among 90 articles obtained in primary search, finally 19 studies entered data extraction and synthesis. Based on our meta-analysis, standardized mean difference was -0.09 (95% CI -0.2, 0.02) for end systolic volume (ESV), -0.10 (95% CI -0.22, 0.01) for end diastolic volume (EDV), 0.10 (95% CI -0.01, 0.22) for ejection fraction (EF) and -0.09 (95% CI -0.23, 0.04) for stroke volume (SV). Conclusion: Results of this systematic review and meta-analysis showed that there is no statistically significant difference between CTA and MRA in evaluating ESV, EDV, EF and SV. Based on our findings, it can be interpreted that CTA has similar accuracy with MRA in evaluating ventricular volumes.


Resumen Introducción: Las enfermedades cardiovasculares están entre las principales causas de morbimortalidad global. La prevención, el diagnóstico precoz y el tratamiento pueden desempeñar un papel importante en la reducción de las complicaciones de las enfermedades cardiovasculares. Objetivo: Teniendo en cuenta la creciente popularidad de la angiografía por tomografía computarizada (ATC) cardiaca, por un lado, y también la angiografía por resonancia magnética (ARM) como el método de referencia, por el otro, decidimos llevar a cabo un metaanálisis para comparar la ATC y la ARM cardiaca en la evaluación de los volúmenes del ventrículo izquierdo. Método: Revisión sistemática en la cual incluimos todos los estudios con criterios de inclusión y sin criterios de exclusión hasta el 30 de diciembre de 2019. Los estudios se seleccionaron de diferentes bases de datos y artículos de las bibliografías de los estudios incluidos. Los estudios obtenidos se examinaron para evaluar su calidad. Los datos requeridos fueron extraídos y luego analizados utilizando el paquete estadístico STATA 11. Resultados: De los 90 artículos obtenidos en la búsqueda primaria, finalmente 19 estudios entraron a extracción de datos y síntesis. Según nuestro metaanálisis, la diferencia de medias estandarizada fue de −0.09 (intervalo de confianza del 95% [IC95%] −0.2 a 0.02) para el volumen sistólico final (VSF), −0.10 (IC95%: −0.22 a 0.01) para el volumen diastólico final (VDF), 0.10 (IC95%: −0.01 a 0.22) para la fracción de eyección (FE) y − 0.09 (IC95%: −0.23 a 0.04) para el volumen sistólico (VS). Conclusiones: Los resultados de esta revisión sistemática y metaanálisis mostraron que no existe una diferencia estadísticamente significativa entre la ATC y la ARM en la evaluación del VSF, el VDF, la FE y el VS. Basado en nuestros hallazgos, se puede interpretar que la ATC tiene una precisión parecida a la ARM en la evaluación de los volúmenes ventriculares.


Subject(s)
Stroke Volume , Meta-Analysis , Magnetic Resonance Angiography , Computed Tomography Angiography , Heart Ventricles
7.
Rev. bras. oftalmol ; 80(3): e0007, 2021. graf
Article in Portuguese | LILACS | ID: biblio-1280119

ABSTRACT

RESUMO Os diagnósticos diferenciais que compõem as proptoses agudas são, muitas vezes, desafiadores. A anamnese e o exame clínico exigem do oftalmologista atenção especial aos detalhes que permitem diferenciar quadros relativamente benignos e autolimitados de quadros que evoluirão com incapacidades permanentes. Relatamos o caso de uma paciente de 49 anos que, durante viagem de avião, apresentou dor ocular, hematoma periorbitário e proptose do olho esquerdo súbitos. Referia diplopia aguda incapacitante. Exames de tomografia e angiorressonância magnética confirmaram diagnóstico de sinusopatia do seio etmoidal esquerdo e hematoma subperiosteal da órbita esquerda, associado ao barotrauma. Apesar de raro, o diagnóstico de hematoma subperiosteal não traumático deve ser considerado diferencial em relação a proptoses agudas, sendo a anamnese fundamental para essa elucidação diagnóstica.


ABSTRACT Differential diagnoses of acute proptosis are often challenging. History and clinical examination require from ophthalmologists special attention to details, which make it possible to differentiate relatively benign and self-limited conditions from those that will progress to permanent disabilities. We report a 49-year-old female patient who had sudden eye pain, periorbital hematoma and proptosis of the left eye during a commercial flight. She also complained of disabling acute diplopia. Computed tomography and magnetic resonance angiography imaging confirmed the diagnosis of subperiosteal hematoma of the left orbit, associated with left ethmoid sinus disease. Although rare, non-traumatic subperiosteal hematoma should be considered in differential diagnoses of acute proptosis, and history taking is fundamental to elucidate the picture.


Subject(s)
Humans , Female , Middle Aged , Orbital Diseases/etiology , Orbital Diseases/diagnostic imaging , Barotrauma/complications , Eye Hemorrhage/etiology , Eye Hemorrhage/diagnostic imaging , Paranasal Sinus Diseases/drug therapy , Paranasal Sinus Diseases/diagnostic imaging , Aviation , Tomography, X-Ray Computed , Exophthalmos , Magnetic Resonance Angiography , Amoxicillin-Potassium Clavulanate Combination/therapeutic use , Diplopia , Air Travel
8.
J. vasc. bras ; 20: e20200142, 2021. graf
Article in English | LILACS | ID: biblio-1287084

ABSTRACT

Abstract Persistent embryological connections between the anterior and posterior circulations are rare entities. Persistent hypoglossal artery is the second most common persistent carotid-basilar anastomosis. As it is often associated with hypoplasia of vertebral arteries, it poses a challenge during endovascular interventions. We present a case of a 32-year-old woman who presented with occipital headache of four weeks' duration. Magnetic Resonance Angiography showed hypoplastic vertebral arteries with a persistent hypoglossal artery arising from the cervical segment of the left internal carotid artery and supplying the entire posterior circulation, associated with a dissecting aneurysm of the right posterior cerebral artery. Endovascular parent vessel occlusion was performed for the dissecting posterior cerebral artery aneurysm by navigating the guide catheter, microwire, and microcatheter through the persistent hypoglossal artery because the vertebral arteries were hypoplastic. Post-intervention, the patient did not develop any neurological deficit and was discharged in a stable condition.


Resumo Conexões embriológicas persistentes entre as circulações anterior e posterior são entidades raras. A artéria hipoglossa persistente é a segunda anastomose carotídeo-basilar persistente mais comum. Como está frequentemente associada à hipoplasia das artérias vertebrais, apresenta um desafio durante as intervenções endovasculares. Apresentamos o caso de uma mulher de 32 anos que apresentou cefaleia occipital com duração de quatro semanas. A angiografia por ressonância magnética mostrou artérias vertebrais hipoplásicas com artéria hipoglossa persistente surgindo do segmento cervical da artéria carótida interna esquerda e suprindo toda a circulação posterior com um aneurisma dissecante da artéria cerebral posterior direita. A oclusão endovascular do vaso parental foi realizada para o aneurisma da dissecção da artéria cerebral posterior pela passagem de cateter guia, microfio e microcateter pela artéria hipoglossa persistente, pois as artérias vertebrais eram hipoplásicas. Após a intervenção, a paciente não apresentou déficit neurológico e recebeu alta em uma condição estável.


Subject(s)
Humans , Female , Adult , Arteriovenous Anastomosis/surgery , Posterior Cerebral Artery/surgery , Aortic Dissection/surgery , Vertebral Artery/pathology , Magnetic Resonance Angiography , Endovascular Procedures , Headache , Aortic Dissection/diagnostic imaging
9.
Journal of Central South University(Medical Sciences) ; (12): 467-474, 2021.
Article in English | WPRIM | ID: wpr-880683

ABSTRACT

OBJECTIVES@#Cervicocerebral artery dissection (CAD) is one of the important causes for ischemic stroke in young and middle-aged people. CAD is dangerous and untimely diagnosis and treatment are likely to result in severe disability. Early diagnosis and timely intervention can greatly improve the prognosis of patients. This study was to investigate the imaging features of CAD on high-resolution magnetic resonance vessel wall imaging (HRMR-VWI) and to analyze the influential factors of vascular recanalization.@*METHODS@#A total of 19 CAD patients with both baseline HRMR-VWI and follow-up data of vascular imaging in the period from April 2017 to December 2019 in Department of Radiology, Xiangya Hospital, Central South University were retrospectively analyzed. The diseased vessels were divided into a recovery group and a unrecovered group. After treatment, diseased vessels with no residual arterial dissection and no residual stenosis in the lumen were included in the recovery group. Diseased vessels with stenosis, occlusion or residual dissection were included in the unrecovered group. Diseased vessels were divided into a ischemic stroke group and a non-ischemic stroke group according to the presence or absence of ischemic stroke in the area supplied by the diseased vessels. Differences in clinical data and HRMR-VWI imaging findings were compared between the groups.@*RESULTS@#A total of 26 vessels were involved, including 14 (53.8%) internal carotid artery extracranial segment, 8 (30.8%) vertebral artery extracranial segment, 3 (11.5%) vertebral artery intracranial segment, and 1 (3.9%) basilar artery. Ischemic stroke occurred in 16 diseased vascular supply areas. Intramural hematoma was all observed in the baseline HMR-VWI of the affected vessels. There were 18 vessels (69.2%) in the recovery group and 8 vessels (30.8%) in the unrecovered group. Compared with the vessels in the recovery group, the vessels in the unrecovered group were mostly found in the intracranial segment (@*CONCLUSIONS@#Intramural hematoma is a common imaging manifestation of CAD and can be shown clearly and accurately on HRMR-VWI. Recanalization rate of CAD is high, and the recanalization of CAD in intracranial segment is slower than that of CAD in extracranial segment, which can prolong the review time.


Subject(s)
Humans , Middle Aged , Basilar Artery , Dissection , Magnetic Resonance Angiography , Magnetic Resonance Imaging , Magnetic Resonance Spectroscopy , Retrospective Studies , Stroke
10.
Journal of Peking University(Health Sciences) ; (6): 1133-1138, 2021.
Article in Chinese | WPRIM | ID: wpr-942309

ABSTRACT

OBJECTIVE@#To investigate the presentation of susceptibility vessel sign (SVS) in subacute stroke patients with large vessel occlusion.@*METHODS@#We collected consecutive stroke patients who were admitted to Peking University First Hospital from December 2017 to August 2019 retrospectively. Those who had intracranial large vessel occlusion and received sensitivity weighted imaging (SWI) within 3 to 14 days after stroke onset were included in our analysis. The diagnosis of large vessel occlusion was based on magnetic resonance angiography (MRA), CT angiography (CTA) or digital subtraction angiography (DSA). The demographic information, clinical characteristics and imaging results were obtained from medical record. The occurrence rates of SVS sign were compared between stroke patients with cardioembolism (CE) and large artery atherosclerosis (LAA). In the sensitivity analysis, we performed a subgroup analysis in those patients who received SWI within 7 to 14 days after stroke onset. We also compared the occurrence rate of SVS sign between the patients with and without atrial fibrillation.@*RESULTS@#A total of 51 patients, 19 females and 32 males, with an average age of (63.04±11.23) years were analyzed in this study. Compared with LAA group, the patients in CE group were older and more likely to have an atrial fibrillation (P < 0.05). There were no significant differences between the CE group and LAA group in gender, hypertension, diabetes, coronary heart disease, hyperlipidemia, smoking, or National Institute of Health stroke scale(NIHSS) score at admission. SVS sign was found in 30 patients. Of whom, 3 were in CE group and 27 in LAA group. The occurrence rate of SVS sign was higher in the LAA group than in the CE group significantly (65.9% vs. 30.0%, P=0.039). The subgroup analysis showed that, in the patients who received SWI examination within 7 to 14 days after stroke onset, the differences between the two groups were still statistically significant (0 vs. 72.7%, P=0.006). Another sensitivity analysis showed that, the rate of SVS in the patients with atrial fibrillation was significantly lower than those patients without atrial fibrillation (25% vs. 65.1%, P=0.043).@*CONCLUSION@#In subacute stroke patients, the occurrence rate of SVS sign in CE group was lower than that of LAA group. The significance of SVS sign in the differentiation of stroke subtype needs further validation.


Subject(s)
Aged , Female , Humans , Male , Middle Aged , Arteries , Atherosclerosis , Magnetic Resonance Angiography , Retrospective Studies , Stroke/diagnostic imaging
11.
Acta Academiae Medicinae Sinicae ; (6): 406-413, 2021.
Article in Chinese | WPRIM | ID: wpr-887873

ABSTRACT

Objective To evaluate the diagnostic performance of 1.5-T non-contrast free-breathing whole-heart magnetic resonance coronary angiography(MRCA)for≥50% and≥70% coronary artery stenosis in coronary artery disease(CAD).Methods Forty-one patients clinically scheduled for invasive coronary angiography(ICA)underwent 1.5-T non-contrast free-breathing whole-heart MRCA.The diagnostic performance for≥50% and≥70% stenosis was evaluated and compared using ICA as a reference standard.Results MRCA was completed in all the 41 patients with the total acquisition time of(10.1 ± 2.2)min.The sensitivity,specificity,and accuracy of MRCA for≥50% and≥70% stenosis were 100%(95%


Subject(s)
Humans , Coronary Angiography , Coronary Stenosis/diagnostic imaging , Magnetic Resonance Angiography , Magnetic Resonance Spectroscopy , Predictive Value of Tests , Sensitivity and Specificity
13.
Arq. neuropsiquiatr ; 78(10): 642-650, Oct. 2020. tab, graf
Article in English | LILACS | ID: biblio-1131688

ABSTRACT

ABSTRACT Intracranial vessel wall imaging plays an increasing role in diagnosing intracranial vascular diseases. With the growing demand and subsequent increased use of this technique in clinical practice, radiologists and neurologists should be aware of the choices in imaging parameters and how they affect image quality, clinical indications, methods of assessment, and limitations in the interpretation of these images. Due to the improvement of the MRI techniques, the possibility of accurate and direct evaluation of the abnormalities in the arterial vascular wall (vessel wall imaging) has evolved, adding substantial data to diagnosis when compared to the indirect evaluation based on conventional flow analyses. Herein, the authors proposed a comprehensive approach of this technique reinforcing appropriated clinical settings to better use intracranial vessel wall imaging.


RESUMO O estudo angiográfico intracraniano não invasivo está sendo amplamente utilizado no diagnóstico de doenças vasculares intracranianas. Com a crescente demanda e o aumento subsequente do uso dessa técnica na prática clínica, radiologistas e neurologistas devem estar cientes das opções nos parâmetros de imagem e como estes afetam a qualidade da imagem, as indicações clínicas, os métodos de avaliação e as limitações na interpretação dessas imagens. Devido ao aprimoramento das técnicas de imagem por RM, a possibilidade de avaliação precisa e direta das anormalidades na parede vascular arterial (vessel wall imaging) evoluiu, agregando dados substanciais ao diagnóstico quando comparados à avaliação indireta baseada em análises de fluxo convencionais. Neste artigo, os autores discorrem sobre a avaliação e interpretação dos achados de imagem desta nova técnica e suas aplicações clínicas.


Subject(s)
Humans , Magnetic Resonance Imaging , Cerebrovascular Disorders , Magnetic Resonance Angiography/methods , Head
14.
Rev. chil. radiol ; 26(1): 8-11, mar. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1115519

ABSTRACT

Resumen: El hamartoma fibroso de la infancia (FHI) es una lesión rara de tejidos blandos en niños con morfología trifásica característica. El principal problema con estas lesiones es el diagnóstico diferencial con otras masas de tejidos blandos, en particular sarcomas, que requieren un afrontamiento clínico y terapéutico diferente. Presentamos un caso de un infante de 10 meses con un crecimiento asintomático de una masa axilar que, tras realizarse angioresonancia magnética y biopsia se confirmó el diagnóstico de FHI.


Abstract: Fibrous hamartomas of childhood (FHC) are rare soft tissue lesions in infants and young children with characteristic three-phase morphology.The main problem with these lesions is differentiating it from other soft tissue masses, in particular sarcomas, which require a different clinical and therapeutic approach. We present a case of a 10-month-old infant with asymptomatic growth of a left axillary mass that, after magnetic resonance angiography and biopsy, the diagnosis of FHC was confirmed.


Subject(s)
Humans , Female , Infant , Soft Tissue Neoplasms/diagnostic imaging , Hamartoma/diagnostic imaging , Fibrosis , Ultrasonography, Doppler , Magnetic Resonance Angiography , Hamartoma/pathology
15.
Medicina (B.Aires) ; 80(1): 84-86, feb. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1125041

ABSTRACT

El síndrome de Klippel-Trenaunay-Weber (SKTW) es una rara malformación venosa que, en general afecta a los miembros inferiores y, más raramente, a los superiores. Se caracteriza por formaciones angiomatosas cutáneas, várices e hipertrofia del miembro afectado. El compromiso genitourinario es sumamente infrecuente. Se presenta el caso de una paciente de 14 años. Ingresó por hematuria macroscópica de 48 h de evolución y metrorragia con grave compromiso hemodinámico. Se encontraba en estudio por presentar un hemangioma en el miembro inferior izquierdo que se extendía hasta la región pelviana. La uretrocistofibroscopía demostró la presencia de múltiples lesiones angiomatosas diseminadas en forma amplia en la vejiga, algunas de ellas con sangrado activo. La angioresonancia mostró una voluminosa formación hipervascularizada en contacto con la pared vesical a la cual desplazaba y fístulas arteriovenosas a nivel pelviano y en el miembro inferior izquierdo confirmando el diagnóstico etiológico. Se realizó una embolización arterial selectiva de los territorios ilíacos interno y externo e inmediatamente después una endocoagulación láser de los focos angiomatosos sangrantes. La hematuria remitió completamente en las 24 h posteriores al procedimiento. La metrorragia asociada al SKTW fue controlada mediante la utilización de análogos LHRH y progestágenos.


Klippel-Trenaunay-Weber syndrome (KTWS) is a rare venous malformation that generally affects the lower limbs and, more infrequently, the upper limbs. It is characterized by cutaneous angiomatous formations, varicose veins and hypertrophy of the affected limb. The involvement of the genitourinary tract is extremely infrequent. We expose the case of a 14 years old female patient who was admitted for macroscopic hematuria of 48 hours of evolution and metrorrhagia with severe hemodynamic decompensation. The patient was under study for presenting a hemangioma in the lower left limb that extended to the pelvic region. Urethrocystofibroscopy showed the presence of multiple wide-spread angiomatous lesions in the bladder, some of them with active bleeding. The angio-resonance showed a voluminous hypervascular formation in contact with the bladder wall showing several arteriovenous fistulas at the pelvic level and in the left lower limb confirming the etiological diagnosis. A selective arterial embolization of the internal and external iliac territories was performed and then, a laser endocoagulation of the bleeding angiomatous foci was carried out. The hematuria completely stopped within 24 hours later of the procedure. The metrorrhagia associated with KTWS was controlled by the use of LHRH analogs and progestogens.


Subject(s)
Humans , Female , Adolescent , Klippel-Trenaunay-Weber Syndrome/surgery , Endovascular Procedures/methods , Metrorrhagia/surgery , Pelvis , Klippel-Trenaunay-Weber Syndrome/pathology , Klippel-Trenaunay-Weber Syndrome/diagnostic imaging , Magnetic Resonance Angiography/methods , Gallbladder Diseases/surgery , Gallbladder Diseases/pathology , Hemangioma/surgery , Hemangioma/pathology , Hematuria/surgery , Hematuria/pathology , Metrorrhagia/pathology
17.
Article in English | LILACS, SES-SP | ID: biblio-1143840

ABSTRACT

ABSTRACT Objective: To report a rare case of inverse Kipplel-Trenaunay. Case description: A 16-year-old girl with a grayish-depressed plaque on her left thigh. Angioresonance showed a vascular malformation affecting the skin and subcutaneous tissue. Comments: Inverse Klippel-Trenaunay is a Klippel-Trenaunay syndrome variation in which there are capillary and venous malformations associated to hypotrophy or shortening of the affected limb. Modifications on the limb's length or width result from alterations in bones, muscles, or subcutaneous tissues. It has few described cases. Further clinical and molecular studies must be performed for a proper understanding.


RESUMO Objetivo: Relatar um caso raro de Klippel-Trenaunay inverso. Descrição do caso: Menina de 16 anos com placa deprimida acinzentada na coxa esquerda, evidenciando-se, por meio de angioressonância, uma malformação vascular, acometendo a pele e tecidos subcutâneos. Comentários: Klippel-Trenaunay inverso é uma variante da síndrome de Klippel-Trenaunay em que há malformação capilar e venosa associada à hipotrofia ou encurtamento do membro afetado. Pode envolver acometimento ósseo, muscular ou subcutâneo, modificando o comprimento ou a circunferência do membro. Há poucos casos descritos, e mais estudos clínicos e moleculares precisam ser realizados para seu correto entendimento.


Subject(s)
Humans , Female , Adolescent , Skin Abnormalities/pathology , Klippel-Trenaunay-Weber Syndrome/diagnosis , Subcutaneous Tissue/pathology , Vascular Malformations/diagnostic imaging , Magnetic Resonance Angiography/methods , Subcutaneous Tissue/blood supply , Vascular Malformations/pathology
18.
Journal of Central South University(Medical Sciences) ; (12): 1476-1482, 2020.
Article in English | WPRIM | ID: wpr-880610

ABSTRACT

The traditional classification, diagnosis, and treatment of intracranial aneurysms are based on the characteristics of their vascular lumen. However, in the past few years, some advances in MRI technology with high-resolution imaging can assess the pathology of intracranial vascular walls. Compared with traditional methods of computed tomography angiography, magnetic resonance angiograhpy, and digital subtraction angiography, high resolution magnetic resonance imaging technology can help us to newly understand the disease by directly evaluating the characteristics of vascular wall, such as aneurysm wall thickness, inflammation, enhancement, permeability and hemodynamics. At present, high-resolution magnetic resonance imaging is increasingly used in clinic to assess the rupture risk of intracranial aneurysms, which is of great significance for guiding the diagnosis and treatment of intracranial aneurysms.


Subject(s)
Humans , Aneurysm, Ruptured/diagnostic imaging , Cerebral Angiography , Intracranial Aneurysm/diagnostic imaging , Magnetic Resonance Angiography , Magnetic Resonance Imaging , Risk Assessment , Technology
19.
Acta Academiae Medicinae Sinicae ; (6): 216-221, 2020.
Article in Chinese | WPRIM | ID: wpr-826379

ABSTRACT

To evaluate the feasibility of non-contrast-enhanced magnetic resonance angiography (NCE-MRA) on a 3.0T scanner. Totally 36 volunteers and 24 patients with clinically suspected coronary artery disease underwent NCE-MRA. The quality of the NCE-MRA images was graded for each segment on a four-point scale. The subjects were divided into two groups according to image quality. The age,body mass index (BMI),heart rate,end-expiratory diaphragm displacement,and respiratory diaphragm motion amplitude were evaluated and compared. The average image quality score of every segment was above 2 points. The proximal and middle segments of left anterior descending artery had significantly higher quality scores than the distal segments (=0.000) and the proximal segment of left circumflex coronary artery had significantly higher quality scores than the distal segments (=0.000),the proximal segment of right coronary artery also had a significant higher quality score than its distal segment (=0.001). The image quality was good in 38 subjects (64.4%). The heart rate [(66.35±9.39) beat/min (75.32±11.67) beat/min] (=0.002) and the body mass index [(24.72±3.33) kg/m (27.82±3.61) kg/m ] (=0.002) were significantly different between the good image quality group and the poor image quality group. The end-expiratory diaphragm displacement in good image quality group was (4.43±2.07)mm,which was significantly lower than that in poor image quality group [(9.26±7.62)mm](=0.013). The respiratory diaphragm motion amplitude [(21.35±6.02) mm] in good image quality group was significantly lower than that in poor image quality group [(30.68±14.20)mm](=0.012). NCE-MRA on 3.0T is a feasible tool for visualization of the proximal and middle segments of coronary arteries,and the image quality can be optimized by controlling heart rate and respiration in the future.


Subject(s)
Humans , Contrast Media , Coronary Angiography , Coronary Artery Disease , Diagnostic Imaging , Coronary Vessels , Diagnostic Imaging , Feasibility Studies , Magnetic Resonance Angiography
20.
Clinics ; 75: e1212, 2020. tab, graf
Article in English | LILACS | ID: biblio-1055876

ABSTRACT

OBJECTIVE: To evaluate the findings of magnetic resonance angiography (MRA) and transcranial Doppler ultrasound (TCD) in patients with a clinical diagnosis of vertebrobasilar insufficiency (VBI). METHOD: From our outpatient neurotology clinic, we selected patients (using the criteria proposed by Grad and Baloh) with a clinical diagnosis of VBI. We excluded patients with any definite cause for vestibular symptoms, a noncontrolled metabolic disease or any contraindication to MRA or TCD. The patients in the study group were sex- and age-matched with subjects who did not have vestibular symptoms (control group). Our final group of patients included 24 patients (study, n=12; control, n=12). RESULTS: The MRA results did not demonstrate significant differences in the findings between our study and control groups. TCD demonstrated that the systolic pulse velocity of the right middle cerebral artery, end diastolic velocity of the basilar artery, pulsatility index (PI) of the left middle cerebral artery, PI of the right middle cerebral artery, and PI of the basilar artery were significantly higher in the study group than in the control group, suggesting abnormalities affecting the microcirculation of patients with a clinical diagnosis of VBI compared with controls. CONCLUSION: MRA failed to reveal abnormalities in patients with a clinical diagnosis of VBI compared with controls. The PI of the basilar artery, measured using TCD, demonstrated high sensitivity (91%) and specificity (91%) for detecting clinically diagnosed VBI.


Subject(s)
Humans , Basilar Artery/diagnostic imaging , Vertebrobasilar Insufficiency/diagnostic imaging , Ultrasonography, Doppler, Transcranial/methods , Magnetic Resonance Angiography , Blood Flow Velocity , Microcirculation
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