caa a22 4500 605495041 CHVBK 20210128100529.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s00261-014-0280-0 doi (NATIONALLICENCE)springer-10.1007/s00261-014-0280-0 Accuracy and radiation dose reduction of a limited abdominopelvic CT in the diagnosis of acute appendicitis [Elektronische Daten] [Michael Corwin, Melanie Chang, Ghaneh Fananapazir, Anthony Seibert, Ramit Lamba] Purpose: To determine the accuracy and radiation dose reduction of a limited abdominopelvic CT from the bottom of T10 to the top of the pubic symphysis in patients with suspected acute appendicitis. Methods: We performed a HIPAA compliant and IRB-approved retrospective study of adult patients who underwent CT abdomen/pelvis for suspected appendicitis. The Z-axis length and whole body effective doses of the original full scan and theoretical limited scan from the bottom of T10 to the top of the pubic symphysis were recorded. Images were reviewed to determine if the appendix or entire cecum would be visualized and if any cases of appendicitis or alternative diagnoses would be missed with the limited scan. Results: 235 patients (89 male, mean age 44.6years) were included. The limited scan resulted in a mean Z-axis length reduction of 5.1cm superiorly, 6.1cm inferiorly, and a total reduction of 11.2cm (24%). The mean whole body effective dose was 11.8 and 9.1mSv for the original and limited scans, respectively (23% reduction). The entire appendix or cecum was visualized in all cases. Appendicitis was present in 24 cases and an alternative diagnosis was made in 75. No cases of appendicitis or alternative diagnoses were missed using the limited scan. Conclusions: A limited range CT from the bottom of T10 to the top of the pubic symphysis is as accurate as full abdominopelvic CT in evaluating patients with suspected acute appendicitis and results in approximately 23% dose reduction. Springer Science+Business Media New York, 2014 Appendicitis nationallicence Dose reduction nationallicence MDCT nationallicence Corwin Michael Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut Chang Melanie Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut Fananapazir Ghaneh Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut Seibert Anthony Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut Lamba Ramit Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut Abdominal Imaging Springer US; http://www.springer-ny.com 40/5(2015-06-01), 1177-1182 0942-8925 40:5<1177 2015 40 261 https://doi.org/10.1007/s00261-014-0280-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00261-014-0280-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Corwin Michael Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut NATIONALLICENCE 700 1- Chang Melanie Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut NATIONALLICENCE 700 1- Fananapazir Ghaneh Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut NATIONALLICENCE 700 1- Seibert Anthony Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut NATIONALLICENCE 700 1- Lamba Ramit Department of Radiology, University of California, Davis Medical Center, 4860 Y Street, Suite 3100, 95817, Sacramento, CA, USA aut NATIONALLICENCE 773 0- Abdominal Imaging Springer US; http://www.springer-ny.com 40/5(2015-06-01), 1177-1182 0942-8925 40:5<1177 2015 40 261