title: Accuracy and calibration of integrated radiation output indicators in diagnostic radiology: A report of the AAPM Imaging Physics Committee Task Group 190.
abstract: Due to the proliferation of disciplines employing fluoroscopy as their primary imaging tool and the prolonged extensive use of fluoroscopy in interventional and cardiovascular angiography procedures, "dose-area-product" (DAP) meters were installed to monitor and record the radiation dose delivered to patients. In some cases, the radiation dose or the output value is calculated, rather than measured, using the pertinent radiological parameters and geometrical information. The AAPM Task Group 190 (TG-190) was established to evaluate the accuracy of the DAP meter in 2008. Since then, the term "DAP-meter" has been revised to air kerma-area product (KAP) meter. The charge of TG 190 (Accuracy and Calibration of Integrated Radiation Output Indicators in Diagnostic Radiology) has also been realigned to investigate the "Accuracy and Calibration of Integrated Radiation Output Indicators" which is reflected in the title of the task group, to include situations where the KAP may be acquired with or without the presence of a physical "meter." To accomplish this goal, validation test protocols were developed to compare the displayed radiation output value to an external measurement. These test protocols were applied to a number of clinical systems to collect information on the accuracy of dose display values in the field.
authors.affiliation: Virginia Commonwealth University Medical Center, Richmond, Virginia 23298.
authors.forename: Pei-Jan P
authors.initials: PJ
authors.lastname: Lin
authors.affiliation: Mayo Clinic, Rochester, Minnesota 55905.
authors.forename: Beth A
authors.initials: BA
authors.lastname: Schueler
authors.affiliation: Columbia University Medical Center, New York, New York 10032.
authors.forename: Stephen
authors.initials: S
authors.lastname: Balter
authors.affiliation: Children's Hospital Medical Center, Cincinnati, Ohio 45229.
authors.forename: Keith J
authors.initials: KJ
authors.lastname: Strauss
authors.affiliation: Cleveland Clinic Foundation, Cleveland, Ohio 44195.
authors.forename: Kevin A
authors.initials: KA
authors.lastname: Wunderle
authors.affiliation: Baystate Health Systems, Inc., Springfield, Massachusetts 01199.
authors.forename: M Terry
authors.initials: MT
authors.lastname: LaFrance
authors.affiliation: Children's Hospital Boston, Boston, Massachusetts 02115.
authors.forename: Don-Soo
authors.initials: DS
authors.lastname: Kim
authors.affiliation: Boston University Medical Center, Boston, Massachusetts 02118.
authors.forename: Richard H
authors.initials: RH
authors.lastname: Behrman
authors.affiliation: University of Texas MD Anderson Cancer Center, Houston, Texas 77096.
authors.forename: S Jeff
authors.initials: SJ
authors.lastname: Shepard
authors.affiliation: Children's Hospital Colorado, Aurora, Colorado 80045.
authors.forename: Ishtiaq H
authors.initials: IH
authors.lastname: Bercha
mesh_terms: D002138:Calibration; D005471:Fluoroscopy / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation / Q000379:methods / Q000592:standards*; D015203:Reproducibility of Results