What does enhancing mass lesion mean?
Therefore, an enhancing lesion is a lesion that assumes contrast medium. In some cases this contrast-enhancing lesion may be acute (e.g. an acute multiple sclerosis lesion), but in other cases an enhancement may be even related to non-acute findings (e.g. vascular malformation)
What does Enhancing mean on CT scan?
Contrast enhancement is a ubiquitous term in radiology and can be used in three ways. Firstly, it may refer to any method of exaggerating the visible difference between adjacent structures on imaging by administering contrast media/agents. This includes differentiating between normal structures.
What enhances on MRI?
Gadolinium contrast is used in about one in three MRI scans, to improve the diagnostic accuracy of the scan. Adding contrast to the image enhances the visibility of inflammation, tumors, blood vessels and the blood supply of certain organs.
What are lesions?
Listen to pronunciation. (LEE-zhun) An area of abnormal tissue. A lesion may be benign (not cancer) or malignant (cancer).
What can causes ring-enhancing lesions?
With the introduction of HIV/AIDS, toxoplasmosis, and fungal infections such as cryptococcosis or histoplasmosis are increasingly associated with ring enhancement as well. Other causes for ring-enhancement are primary brain tumors, metastases, brain abscesses, granulomas, resolving hematomas, and infarcts (2).
What enhances on CT?
Of the 80 million or more CT scans performed each year in the United States, iodine-based contrast material is used in at least half to enhance computed tomography (CT) images, according to researchers.
What is Nonenhancing tumor?
Often, at least a portion of the tumor extending beyond the contrast-enhancing margin is visible with MR imaging and is known as non-contrast-enhancing tumor (nCET), usually best visualized on T2-weighted FLAIR imaging.
What does no enhancement on brain MRI mean?
For peripherally enhancing masses, the main differential diagnosis lies between high-grade and secondary brain tumours, inflammatory or demyelinating lesions and abscesses. Non-enhancing lesions may represent low-grade gliomas (LGGs), viral encephalitis and developmental anomalies, such as focal cortical dysplasia.
What does washout mean on MRI?
Washout appearance is defined as a visually assessed temporal reduction in enhancement relative to surrounding liver from an earlier to a later phase, resulting in portal venous or delayed phase hypoenhancement (12).
What is a Nonenhancing cyst?
Nonenhancing hyperattenuating cysts that are larger than 3 cm or completely intrarenal are included in this category (1). According to one study, 95% of these lesions are benign and therefore have a low probability of being small renal cell carcinoma and a low chance of metastasis (6).