In these last 2 settings, the complementary use of liver-specific contrast agents can be advantageous. Furthermore, if the lesion has a diameter < 1 cm, diagnosis is usually unreliable. However, in lesions measuring 1-2 cm, establishing the definitive diagnosis is a real challenge, with sensitivity values of 45-65%, but generally with excellent specificity (> 95%). They are more reliable in lesions > 2 cm. In regard to hepatocellular carcinoma, the diagnostic performance of magnetic resonance through the «conventional» protocols and multi-detector computerized tomography consisting of multiphase evaluation with intravenous contrast, largely depends on the size of the lesion. Gadolinium-enhanced magnetic resonance for the evaluation of hepatic lesions is increasingly being used in clinical practice, especially in patients with suspicious focal lesions, whether benign or malignant. El objetivo de este artículo es revisar la evidencia actual de la utilidad de este nuevo método de diagnóstico no invasivo en las lesiones hepáticas. En estos 2 últimos escenarios, el uso complementario de medios de contraste hepatoespecíficos puede ser útil. Además, si la lesión tiene un diámetro < 1 cm, el diagnóstico es generalmente poco fiable. Sin embargo, para aquellas lesiones de 1-2 cm, el establecimiento de un diagnóstico definitivo es un verdadero reto, con valores de sensibilidad del 45-65%, aunque por lo general con una excelente especificidad (> 95%). En el caso del carcinoma hepatocelular, el rendimiento diagnóstico de la resonancia magnética a través de protocolos «convencionales» y mediante la tomografía computarizada multidetector, que consiste en la evaluación de múltiples fases con contraste intravenoso, depende en gran medida del tamaño de la lesión, considerándose más certero en lesiones > 2 cm. PLEASE CONTACT US IF YOU HAVE A PACEMAKER, ARTIFICIAL LIMBS, METAL PINS/FRAGMENTS IN YOUR BODY (ESPECIALLY IN THE EYES), METAL HEART VALVES, METAL CLIPS IN YOUR BRAIN, METAL IMPLANTS IN EARS, OR ANY OTHER IMPLANTED OR PROSTHETIC MEDICAL DEVICE.La resonancia magnética con gadolinio para la evaluación de lesiones hepáticas es un método cada vez más utilizado en la práctica clínica, particularmente para pacientes con lesiones focales sospechosas, ya sean benignas o malignas. A sip of water to take prescription medication is allowed. Most exams require no preparation except for the following:Īny MRI of the Abdomen or Pelvis, it is important to have nothing to eat or drink, including water, for four to six hours before your exam. You also will be asked to remove any metallic objects, such as jewelry, watches, and hair clips. Because of the magnetic field, you will be asked to wear metal-free clothing, or to change into a gown.Before your MRI scan, please contact us so we can provide specific instructions and review your health and insurance information. MRI does not use ionizing radiation (x-rays).Preparation for your MRI will depend on the type of exam.MR imaging uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed pictures of organs, soft tissues, bone and virtually all other internal body structures.
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