What is this table of weight based CT scan injection parameters


CT scanning means "computed tomography".  (Commonly called a "CAT Scan".)  CT scans are a common diagnostic test used to create images of the human body, to diagnose diseases.  CT scans are performed at hospitals and the images are looked at and reported by radiologists.  The quality of a CT scan can often be improved by injecting a "contrast agent" during the scan.  There are several types of contrast agents.  They are all injectable medicines, which are injected quickly into an intravenous catheter during the CT scan.

The table's main purpose is to tell "How fast" and "How much" contrast agent should be injected during the scan.  These are the Rate and Dose columns in the table.  The Delay column refers to "How many seconds" to wait to start scanning after starting the injection.

The intended audience for this table, is Radiologists peforming CT scans.  The parameters in the table are recommended (by its author, Dr. Steven B. Halls)  for other radiologists to consider using.  These parameters are an improvement, a slightly better way of doing things. Radiologists are conservative and careful folks who are not inclined to change the way they work unless there is good evidence to support it. This table has links to other pages which describe the evidence used to create the numbers in the table.  Clicking on the table's column headings will take you to pages which describe the scientific reasons for the numbers.

This method for injecting contrast agents for CT scanning  was called the "Cross Method", because it was developed at the Cross Cancer Institute,  in Edmonton, Alberta, Canada. It may not be in use nowadays. This was from way back in the early 2000s.

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