Valoración anatómica de la vía biliar y de sus alteraciones por medio de resonancia magnética con el contraste hepatoespecífico ácido gadoxético Anatomical evaluation of the biliary tract and its alterations by magnetic resonance with the hepatospecific contrast gadoxetic acid
Introduction: Nasal septal deviation is defined as any bending of the septal contour observable on coronal computed tomography (CT) scans and is present in more than half of the population. Concha bullosa (CB) is defined as persistent pneumatisation of the middle turbinate. The purposes of this study are to identify its frequency, as well as its relationship with the deviation of the nasal septum in the population that attends the HGMEL and to propose a radiological classification according to its size and location in relation to the degree of turbinate obstruction. Method: Osteomeatal CT scans performed during one year (January-December 2020) were analysed. All cases presented deviation of the nasal septum. We use the Bolger and Calvo-Henriquez classifications and propose a classification according to the maximum size of the extension in the coronal plane (General Hospital of Mexico Eduardo Liceaga [HGMEL] Classification). Results: Of 142 CT scans of nasal sinuses, 99 were excluded because they did not present CB; as for the remaining 43 (30.28%) subject to this analysis, 27 corresponded to women (62.7%). The incidence of unilateral type CB was 65.12% and that of the bilateral type of 34.88%, with left unilateral CB in 57.14% of cases. The most frequent forms were type 2 (lamellar) with the Bolger classification, type I with the Calvo-Henríquez classification, and grade 1 according to the HGMEL classification. Conclusion: The proposed classification is based on the involvement of the middle turbinate caused by the deviation of the septum due to its anatomical and physiological importance. It is important as a surgical reference and can be easily studied on the preoperative CT scan.
La resonancia magnética (RM) de cuerpo entero ponderada en difusión es un complemento de la RM anatómica que proporciona una evaluación funcional de la enfermedad, cuantifica la extensión, no requiere contraste, son pocos los riesgos a largo plazo y se realiza en tiempos razonablemente cortos.Objetivo: Analizar la estadificación y la respuesta al tratamiento en pacientes con linfoma no Hodgkin mediante resonancia magnética de cuerpo entero con imágenes potenciadas en difusión.Método: Se incluyeron pacientes en quienes se realizó estudio basal y de intervalo con protocolo de difusión de cuerpo entero, con archivos disponibles sistema RIS-PACS (Radiolo-
La resonancia magnética en contraste de fase permite estudiar la dinámica del líquido cefalorraquídeo (LCR) de manera cualitativa y cuantitativa. Material y métodos: Se realizó un estudio retrospectivo y descriptivo con una muestra de 25 estudios, de los cuales 13 se efectuaron en pacientes sanos y 12 tenían datos de neuroinfección, hasta un 91.7% secundario a tuberculosis meníngea. Resultados: La media de velocidad del LCR en pacientes con neuroinfección fue de 2.549 cm/s (0.573-5.200) en comparación con los individuos sanos con media de 2.882 cm/s (1.0-6.420). Conclusiones: Al analizar las diferencias de medias en cm/s no se identificó diferencia significativa (p = 0.614) con 95% de intervalo de confianza.
Palabras clave:Resonancia magnética en contraste de fase. Líquido cefalorraquídeo. Neuroinfección. Tuberculosis meníngea.
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