BRONCHOGENIC-CARCINOMA - A SURVEY OF CT PROTOCOLS FOR STAGING DISEASE

Rationale and objectives. To determine whether a standard computed tom ographic (CT) protocol is used in the staging of lung cancer. Material s and Methods. A questionnaire was designed to determine what type of CT scanner is used, whether intravenous contrast material is used, how often the abdomen is scanned and at what level, and the section thick nesses used in scanning the chest of abdomen in patients with lung can cer. A total of 1,118 survey forms were mailed to members of the Socie ty of Thoracic Radiology and to all community hospitals in the United States with at least 300 beds. Results. The authors received 520 respo nses (47%) to the 1,118 questionnaires mailed. If these 520 responses, 140 were from society members, 256 were from hospitals with 300-500 b eds, and 124 were from hospitals with more than 500 beds. One-half of hospital respondents used helical CT scanners. Significantly more soci ety members used helical CT scanners (P < .001). Intravenous contrast material was used to opacify mediastinal blood vessels at 449 (86%) of 520 hospitals. Intravenous contrast material was used for liver scann ing at 363 (82%) of 444 hospitals, but it was used less often at hospi tals in the northeast region and by society members than at hospitals in other regions (P < .001). A mixture of section thicknesses was comm only used (252 [48%] of 520 responses) for scanning the chest; a thick ness of 8-10 mm was used in scanning the abdomen at most hospital (348 [78%] of 445 responses). Conclusion. No CT protocol is consistently u sed for the examination of patients with lung cancer. Use of intraveno us contrast material during chest or liver CT also is not uniform.