Magnetic resonance imaging of the pediatric mediastinum: updates, tips and tricks

Author(s):  
Paul G. Thacker
2011 ◽  
Vol 28 (6) ◽  
pp. 1465-1475 ◽  
Author(s):  
Marcelo Souto Nacif ◽  
Anna Zavodni ◽  
Nadine Kawel ◽  
Eui-Young Choi ◽  
João A. C. Lima ◽  
...  

2016 ◽  
Vol 89 (1062) ◽  
pp. 20150987 ◽  
Author(s):  
Khalid Alfudhili ◽  
Pier G Masci ◽  
Jean Delacoste ◽  
Jean-B Ledoux ◽  
Grégoire Berchier ◽  
...  

2018 ◽  
Vol 28 (02) ◽  
pp. 130-141
Author(s):  
Julián Chavarriaga Soto ◽  
María Antonia Ocampo ◽  
Andrés Felipe Gutiérrez

Introducción y Objetivos La biopsia transrectal de la próstata (BTRP), fue propuesta por primera vez en 1937 y hasta 1981 se realizó la primera biopsia ecodirigida, actualmente es la vía de acceso a la próstata más utilizada por su fácil curva de aprendizaje como por el alto rendimiento diagnóstico, sin embargo, en el Reino Unido, el 68% de los urólogos no realizan BTRP porque consideran que no han recibido suficiente entrenamiento. El objetivo de este estudio es describir las diferentes técnicas utilizadas en la actualidad, las complicaciones del procedimiento y aportar una guía de consejos y trucos implementada en varios centros de referencia a la hora de realizar una BTRP para prevenir complicaciones, mejorar el desempeño de la prueba y del urólogo y estandarizar el método de toma de la BTRP. Materiales y Métodos Realizamos una búsqueda en las bases de datos de PubMed, MEDLINE, SciELO utilizando las palabras claves “Transrectal ultrasound biopsy of the prostate” “tips and tricks” “Transperineal biopsy of the prostate” “Magnetic resonance imaging targeted biopsy” “MRI/US fusion biopsy”, basados en la literatura y en la experiencia de los autores de más de 1100 biopsias anuales entre los diferentes centros de referencia. Brindamos una guía práctica de consejos y trucos para facilitar el desempeño del urólogo en la BTRP. Resultados La biopsia transrectal de próstata ecodirigida continúa siendo la primera opción para el abordaje diagnóstico del paciente con sospecha clínica de cáncer de próstata, es de gran importancia estandarizar el esquema de toma de la biopsia, y en nuestro caso recomendamos utilizar un esquema de 12 cores, definir la profilaxis antibióticas y la duración del tratamiento, y el uso de analgesia o anestesia local. Presentamos los consejos y trucos que hemos utilizado en nuestra práctica clínica en varios centros de referencia.


Author(s):  
Alan P. Koretsky ◽  
Afonso Costa e Silva ◽  
Yi-Jen Lin

Magnetic resonance imaging (MRI) has become established as an important imaging modality for the clinical management of disease. This is primarily due to the great tissue contrast inherent in magnetic resonance images of normal and diseased organs. Due to the wide availability of high field magnets and the ability to generate large and rapidly switched magnetic field gradients there is growing interest in applying high resolution MRI to obtain microscopic information. This symposium on MRI microscopy highlights new developments that are leading to increased resolution. The application of high resolution MRI to significant problems in developmental biology and cancer biology will illustrate the potential of these techniques.In combination with a growing interest in obtaining high resolution MRI there is also a growing interest in obtaining functional information from MRI. The great success of MRI in clinical applications is due to the inherent contrast obtained from different tissues leading to anatomical information.


1998 ◽  
Vol 41 (3) ◽  
pp. 538-548 ◽  
Author(s):  
Sean C. Huckins ◽  
Christopher W. Turner ◽  
Karen A. Doherty ◽  
Michael M. Fonte ◽  
Nikolaus M. Szeverenyi

Functional Magnetic Resonance Imaging (fMRI) holds exciting potential as a research and clinical tool for exploring the human auditory system. This noninvasive technique allows the measurement of discrete changes in cerebral cortical blood flow in response to sensory stimuli, allowing determination of precise neuroanatomical locations of the underlying brain parenchymal activity. Application of fMRI in auditory research, however, has been limited. One problem is that fMRI utilizing echo-planar imaging technology (EPI) generates intense noise that could potentially affect the results of auditory experiments. Also, issues relating to the reliability of fMRI for listeners with normal hearing need to be resolved before this technique can be used to study listeners with hearing loss. This preliminary study examines the feasibility of using fMRI in auditory research by performing a simple set of experiments to test the reliability of scanning parameters that use a high resolution and high signal-to-noise ratio unlike that presently reported in the literature. We used consonant-vowel (CV) speech stimuli to investigate whether or not we could observe reproducible and consistent changes in cortical blood flow in listeners during a single scanning session, across more than one scanning session, and in more than one listener. In addition, we wanted to determine if there were differences between CV speech and nonspeech complex stimuli across listeners. Our study shows reproducibility within and across listeners for CV speech stimuli. Results were reproducible for CV speech stimuli within fMRI scanning sessions for 5 out of 9 listeners and were reproducible for 6 out of 8 listeners across fMRI scanning sessions. Results of nonspeech complex stimuli across listeners showed activity in 4 out of 9 individuals tested.


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