title: Computed tomography use in the adult emergency department of an academic urban hospital from 2001 to 2007.
abstract: OBJECTIVE
  There is both increasing recognition and growing scrutiny of the increased utilization of computed tomography (CT) in medicine. For our primary objective, we determine and quantify the CT utilization rate in our emergency department (ED) during the last 7 years. As a secondary objective, we compare trends in utilization for various types of CT scans.
  
  
  METHODS
  We performed an electronic chart review at our inner-city, academic ED with an annual census of 110,000 patients. We identified all patients older than 21 years who had a CT scan performed during ED management from January 2001 to December 2007. Specific, predetermined data elements (eg, subject demographics, type of CT scan) were extracted on standardized data forms by trained abstractors. We analyzed our data with standard descriptive statistics and linear regression.
  
  
  RESULTS
  The rate of CT utilization increased steadily at approximately 10 CTs per 1,000 (95% confidence interval 7.5 to 13.6 CTs) patients annually during our study period, from 51 per 1,000 patient visits in 2001 to 106 per 1,000 in 2007. Among these CTs, chest CTs increased most, with a 6-fold increase from 1 [corrected] per 1,000 patient visits to 6 [corrected] per 1,000. Neck CTs increased by 5-fold, from 2 [corrected] per 1,000 patient visits to 10 [corrected] per 1,000 patients. Similarly, the utilization of abdomen-pelvis CTs, facial bone CTs, and head CTs increased from 13 per 1,000 to 33 per 1,000 patient visits (150%), 1 per 1,000 to 2 per 1,000 patient visits (100%), and 33 per 1,000 to 53 per 1,000 patient visits (60%), respectively.
  
  
  CONCLUSIONS
  Recent CT utilization in our ED increased in all anatomic categories assessed, with chest CTs and neck CTs increasing the most, followed by abdomen-pelvis CTs, facial bone CTs, and head CTs.
authors.affiliation: Department of Emergency Medicine, St Luke's Roosevelt Hospital Center, New York, NY 10019, USA. jarone.lee@gmail.com
authors.forename: Jarone
authors.initials: J
authors.lastname: Lee
authors.forename: Jonathan
authors.initials: J
authors.lastname: Kirschner
authors.forename: Sapna
authors.initials: S
authors.lastname: Pawa
authors.forename: Dan E
authors.initials: DE
authors.lastname: Wiener
authors.forename: David H
authors.initials: DH
authors.lastname: Newman
authors.forename: Kaushal
authors.initials: K
authors.lastname: Shah
mesh_terms: D000046:Academic Medical Centers / Q000706:statistics & numerical data*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016001:Confidence Intervals; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005147:Facial Bones / Q000000981:diagnostic imaging; D005260:Female; D006257:Head / Q000000981:diagnostic imaging; D006786:Hospitals, Urban / Q000706:statistics & numerical data*; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D009333:Neck / Q000000981:diagnostic imaging; D009519:New York City; D010388:Pelvis / Q000000981:diagnostic imaging; D011860:Radiography, Abdominal / Q000379:methods / Q000706:statistics & numerical data; D013902:Radiography, Thoracic / Q000379:methods / Q000706:statistics & numerical data; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D055815:Young Adult