What Student Need to Know about Contrast Techniques Of Central Nervous System In Radio Diagnosis

Contrast agents are pharmaceuticals that increase the information content of diagnostic images. They serve to improve the sensitivity and specificity of diagnostic images by altering the intrinsic properties of tissues, which influence the fundamental mechanisms of contrast. Strategic localization of the agent can regionally change the tissue properties and result in preferential enhancement. MRI is unique among diagnostic modalities because it uses more than one intrinsic property of the tissue being imaged. All other diagnostic imaging modalities depend on one inherent tissue property for image formation. Further, MRI is neither quantitatively nor parametrically singular in its contrast mechanism, as is computed tomography A non–water-soluble, iodinated ester (iophendylate [Pantopaque]) was introduced in 1942. Because it could not be absorbed by the body, this lipid-based contrast medium required removal after the procedure. Frequently, some contrast remained in the canal and could be seen on noncont