Iohexol: An effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. Its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.Triiodobenzoic Acids: Triiodo-substituted derivatives of BENZOIC ACID.Diatrizoate: A commonly used x-ray contrast medium. As DIATRIZOATE MEGLUMINE and as Diatrizoate sodium, it is used for gastrointestinal studies, angiography, and urography.Contrast Media: Substances used to allow enhanced visualization of tissues.Ioxaglic Acid: A low-osmolar, ionic contrast medium used in various radiographic procedures.Glomerular Filtration Rate: The volume of water filtered out of plasma through glomerular capillary walls into Bowman's capsules per unit of time. It is considered to be equivalent to INULIN clearance.Iodobenzoates: Benzoic acid esters or salts substituted with one or more iodine atoms.Chromium Radioisotopes: Unstable isotopes of chromium that decay or disintegrate emitting radiation. Cr atoms with atomic weights of 46-49, 51, 55, and 56 are radioactive chromium isotopes.Kidney Function Tests: Laboratory tests used to evaluate how well the kidneys are working through examination of blood and urine.Iothalamate Meglumine: A radiopaque medium used for urography, angiography, venography, and myelography. It is highly viscous and binds to plasma proteins.Myelography: X-ray visualization of the spinal cord following injection of contrast medium into the spinal arachnoid space.Body Surface Area: The two dimensional measure of the outer layer of the body.Iopamidol: A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.Diatrizoate Meglumine: A versatile contrast medium used for DIAGNOSTIC X-RAY RADIOLOGY.Kidney Diseases: Pathological processes of the KIDNEY or its component tissues.