Results: 1080

Evaluation of the accuracy of mammography, ultrasound and magnetic resonance imaging in suspect breast lesions

Clinics; 75 (), 2020
OBJECTIVES: In breast cancer diagnosis, mammography (MMG), ultrasonography (USG) and magnetic resonance imaging (MRI) are the imaging methods most used. There is a scarcity of comparative studies that evaluate the accuracy of these methods in the diagnosis of breast cancer. METHODS: A cross-sectional st...

Response to fatigue observed through magnetic resonance imaging on the quadriceps muscle in postmenopausal women

Clinics; 75 (), 2020
OBJECTIVES: Menopause marks the end of women's reproductive period and can lead to sarcopenia and osteoporosis (OP), increasing the risk of falls and fractures. The aim of this study is to evaluate the influence of normal and low bone mineral density (BMD) on muscular activity, observed through inflammat...

Gray matter atrophy in parkinsons disease and the parkinsonian variant of multiple system atrophy: a combined roi- and voxel-based morphometric study

Clinics; 75 (), 2020
OBJECTIVES: Parkinson's disease (PD) and the parkinsonian variant of multiple system atrophy (MSA-P) are distinct neurodegenerative disorders that share similar clinical features of parkinsonism. The morphological alterations of these diseases have yet to be understood. The purpose of this study was to e...

Association of bone mineral density with bone texture attributes extracted using routine magnetic resonance imaging

Clinics; 75 (), 2020
OBJECTIVE: Dual-energy X-ray absorptiometry (DXA)-derived bone mineral density (BMD) often fails to predict fragility fractures. Quantitative textural analysis using magnetic resonance imaging (MRI) may potentially yield useful radiomic features to predict fractures. We aimed to investigate the correlati...

Manual and semiautomatic segmentation of bone sarcomas on MRI have high similarity

Braz. j. med. biol. res; 53 (2), 2020
The aims of this study were to evaluate the intra- and interobserver reproducibility of manual segmentation of bone sarcomas in magnetic resonance imaging (MRI) studies and to compare manual and semiautomatic segmentation methods. This retrospective study included twelve osteosarcoma and eight Ewing sarc...

Ultrasound versus contrast-enhanced magnetic resonance imaging for subclinical synovitis and tenosynovitis: a diagnostic performance study

Clinics; 75 (), 2020
OBJECTIVES: Radiographic manifestations of synovitis (e.g., erosions) can be observed only in the late stage of rheumatoid arthritis. Ultrasound is a noninvasive, cheap, and widely available technique that enables the evaluation of inflammatory changes in the peripheral joint. In the same way, dynamic co...

Quiste de bolsa de Rathke e hiperprolactinemia, una causa infrecuente de amenorrea primaria

El quiste de la bolsa de Rathke es una lesión epitelial benigna de la región selar, formada a partir de remanentes embrionarios. La mayoría de los casos son asintomáticos, aunque pudiera presentarse con cefalea, disfunción hipofisaria y trastornos visuales, muy infrecuentemente como apoplejía hipof...

Resonancia magnética en el diagnóstico del teratoma intracraneal fetal

Rev. colomb. radiol; 31 (2), 2020
Los tumores intracraneales fetales son poco comunes, pero cuando aparecen están asociados con una elevada mortalidad. Muchos de los tumores cerebrales congénitos a menudo provocan la muerte fetal intrauterina, lo que limita la evaluación precisa de su prevalencia e incidencia del tumor. El más frecue...

Lesión multinodular y vacuolar de fosa posterior. Presentación de caso en Colombia

Rev. colomb. radiol; 31 (2), 2020
Existen múltiples lesiones quísticas que se pueden encontrar en el encéfalo y en la fosa posterior. Entre estas, una nueva entidad denominada MV PLUS (por su sigla en inglés de multinodular and vacuolating posterior fossa lesions of unknown significance) tiene características imagenológicas similar...

¿Permiten los entrenamientos de resonancia magnética en espondiloartritis mejorar la performance de los reumatólogos para el reconocimiento de secuencias y lesiones?

Introducción: La resonancia magnética (RM) es una herramienta diagnóstica fundamental en la espondiloartritis (EspA) axial. Objetivo: Estimar el porcentaje de aciertos en el reconocimiento de lesiones en RM de EspA y conocimientos teóricos, antes y después de realizar una intervención educativa. Es...