![]() ![]() The radiologist, a doctor who specializes in medical images, will then talk the individual through the MRI scanning process and answer any questions they may have about the procedure. Patients will sometimes receive an injection of intravenous (IV) contrast liquid to improve the visibility of a particular tissue that is relevant to the scan. Often they can be given medication prior to the MRI to help make the procedure more comfortable. Individuals who are anxious or nervous about enclosed spaces should tell their doctor. This can also include medical devices, such as cochlear implants, aneurysm clips, and pacemakers. The doctor will ask the patient to remove any metal jewellery or accessories that might interfere with the machine.Ī person will probably be unable to have an MRI if they have any metal inside their body, such as bullets, shrapnel, or other metallic foreign bodies. As magnets are used, it is critical that no metal objects are present in the scanner. On arrival at the hospital, doctors may ask the patient to change into a gown. There is very little preparation required, if any, before an MRI scan. The aim of our article was to review the current evidence on the usefulness of this new non-invasive diagnostic method in hepatic lesions.Share on Pinterest A person can listen to music in headphones to mask the loud and sometimes alarming sound of the MRI machine. ![]() 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. 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. ![]()
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