1. 2006 CRCPD 2005-06 NEXT survey of Computed Tomography David Spelic, Physicist Center for Devices and Radiological Health Food and Drug Administration

2. 2006 CRCPD 2005-06 NEXT CT Survey 38 states attended spring 2005 training Two full days: didactic and two site visits Phantoms shipped in two waves: October 05 and January 06- training video Currently: Approximately 20% completion Survey: On-site data collection, Facility Questionnaire, and Physics survey report

3. 2006 CRCPD

4. Facility Questionnaire: CT practice and Exam Protocols

5. 2006 CRCPD

6. Facility Data No. of CT units at facility: 78%- one unit Hospitals: 1.8 units Non-Hosp: 1.1 units Type of facilities surveyed: 65% hospitals % ACR-accredited or in-progress: 10.1% % Doing screening CT exams: 20.5% Whole body: 3.4% Colon: 7.0% Lung: 8.8% Cardiac: 8.8% Surveyed CT Unit Features % Multi-slice units: 75% Most frequent multi-slice format: 4 slice Preliminary Results: 65 surveys

7. 2006 CRCPD Age of Surveyed CT Unit

8. 2006 CRCPD Facility Weekly Workload: Adult CT exams Mean: 128 exams/wk

9. 2006 CRCPD Facility Weekly Workload: Pediatric CT exams Mean: 7.2 exams/wk

10. 2006 CRCPD Adult Head and Body CT Adult Head Exam –% done helical scanning: 15.6% –% using AEC technology: 6.7% Adult Abdomen-Pelvis Exam –% done helical scanning: 100% –% using AEC technology: 54.4%

11. 2006 CRCPD Exam Weekly Workloads on Surveyed CT Unit ExamAdultChildInfant Head32.91.420.72 Sinus10.6 Chest19.00.110.13 Abdomen15.3 Abdm + Pelvis32.41.030.44 Chest + Abdm + Pelvis9.1 Spine7.9 Colon1.4 Coronary Angiography0.16

12. 2006 CRCPD Variation of CT x-ray Tube current Example: Female Rando Phantom

13. 2006 CRCPD AEC response to NEXT phantom

14. 2006 CRCPD Number of CT exams performed in US Annual number of exams (millions) AdultPediatric Total no. of all CT exams performed in hospitals 503 Total no. of all CT exams performed in non-hospital sites 80.3 Total no. of all CT exams performed in U.S. 58 ± 93.3 ± 1 Compare: 2000 NEXT CT survey 46 ± 4 (adult + pediatric) Estimate is based on published data from IMV (published in Imaging Economics, June 2005) and the American Hospital Association on the number of facilities having at least one CT unit, combined with NEXT 2005-06 survey data on facility exam workloads.

15. 2006 CRCPD And finally… Preliminary results show: –26% increase in number of CT exams performed annually in US since previous survey (2000) –Routine Head and Abdomen-Pelvis- most frequently performed CT exams –Document dose savings from AEC technologies MANY THANKS- –State programs –ACR –Shady Grove Adventist Hospital –U.S. Naval Medical Center- Bethesda