Body weight distribution of patients undergoing CT scan

body weight of CT population The population of  this study was consecutive adult cancer patients having CT scans of the chest and/or abdomen, during a 4 year period between 1996 to 1999.  A total of 3992 CT scans were prospectively collected and analysed. The body weight distribution of this population is shown in the graph. The 2 peaks correspond to a mean female body weight of 64 kg  and a mean male body weight of 78 kg.

Body weight categories were established, as shown in the table below.

Weight Category < 38 kg 38-47 kg 48-63 kg 64-77 kg 78-97 kg 98-117 kg 118 + kg
Number of patients 23 155 1015 1374 1115 262 48
Percentage 0.6% 3.9% 25.4% 34.4% 27.9% 6.6% 1.2%

The central 3 weight categories contain 88% of the patients.
The mean weight in this patient population was 73.0 ± 16.7 kilograms. 
The mean weights in each weight category are shown in the following table.

Weight Category < 38 kg 38-47 kg 48-63 kg 64-77 kg 78-97 kg 98-117 kg 118 + kg
Mean weight 29.6 44.2 56.8 70.6 86.0 105.2 122.9

back to CT scan weight based protocol index

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