Limiting overhead views in double-contrast colon examinations does not affect diagnostic accuracy.

A prospective study was undertaken to evaluate whether reducing overhead (technician-performed) films in double-contrast colon examinations had any effect on diagnostic accuracy. Only 4 overhead films were obtained routinely: supine, both decubitus, and prone cross-table rectal views. A high detect rate was maintained, comparable to our accuracy when 7 or 8 overhead films were obtained. Our study confirms that with double-contrast colon examinations, the need for overhead films is diminished. A significant decrease in cost, radiation exposure, and examination time can be obtained. We continued to use this method without any noticeable decrease in diagnostic accuracy.