Principle of HRCT
1.THIN NARROW BEAM COLLIMATION
2.BONE ALGORITHM
3.SMALL FIELD OF VISION
Delineation of soft tissue structures can be made by use of contrast media with CT scan. Iodinated contrast: 1.Ionic monomers:(high osmolar contrast) Amidotriazoate,iothalamate,iothalamate 2.ionic dimers(low osmolar contrast agent) Ioxoglate 3.non ionic monomers: iohexal,iopentol,ioxilan,iomperal,iversal,iopromide,iobitridol, 4.non ionic dimers(iso osmolar contrast agents)iotrolan,iodixanol Barium contrast agents 1.barium swallow 2.barium meal follow through 3.barium enema **In tracheo oesophagial fistula and oesophagial atresia DIANOSIL **GASTROGRAFFIN is preferred in perforation peritonitis and intestinal obstruction.
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