OBJECTIVE: Digital plain radiographs of the full leg are frequently performed examinations of children and young adults. Thus, the objective of this work was to reduce the radiation exposure dependent on specific indications, and to determine objective quality-control criteria to ensure accurate assessment. MATERIALS AND METHODS: Institutional review board approval and informed consent of all participants were obtained. In this prospective, randomized controlled, blinded, two-armed single-center study, 288 evaluable patients underwent plain radiography of the full leg with standard and reduced doses. The evaluation of the plain radiographs was conducted using the following criteria: mechanical axis, leg length, and maturation of the epiphyseal plate. Two blinded radiologists evaluated these criteria using a score ranging from 1 (definitely assessable) to 4 (not assessable). If a single criterion had been evaluated with a score of 3 or more points or all criteria with 2 points, the radiograph was scored as "not assessable". The study was designed as a non-inferiority trial. RESULTS: Eleven (3.8%) examined X-rays were scored as not assessable. The rate of non-assessable radiographs with 33% reduced dose was significantly not inferior to the rate of non-assessable radiographs with standard dose. The evaluation of the quality criteria was dose independent. CONCLUSIONS:Full-leg plain radiography in patients with knee malalignment can be performed at 33% reduced dose without loss of relevant diagnostic information.
RCT Entities:
OBJECTIVE: Digital plain radiographs of the full leg are frequently performed examinations of children and young adults. Thus, the objective of this work was to reduce the radiation exposure dependent on specific indications, and to determine objective quality-control criteria to ensure accurate assessment. MATERIALS AND METHODS: Institutional review board approval and informed consent of all participants were obtained. In this prospective, randomized controlled, blinded, two-armed single-center study, 288 evaluable patients underwent plain radiography of the full leg with standard and reduced doses. The evaluation of the plain radiographs was conducted using the following criteria: mechanical axis, leg length, and maturation of the epiphyseal plate. Two blinded radiologists evaluated these criteria using a score ranging from 1 (definitely assessable) to 4 (not assessable). If a single criterion had been evaluated with a score of 3 or more points or all criteria with 2 points, the radiograph was scored as "not assessable". The study was designed as a non-inferiority trial. RESULTS: Eleven (3.8%) examined X-rays were scored as not assessable. The rate of non-assessable radiographs with 33% reduced dose was significantly not inferior to the rate of non-assessable radiographs with standard dose. The evaluation of the quality criteria was dose independent. CONCLUSIONS: Full-leg plain radiography in patients with knee malalignment can be performed at 33% reduced dose without loss of relevant diagnostic information.
Authors: Katherine P Andriole; Thomas G Ruckdeschel; Michael J Flynn; Nicholas J Hangiandreou; A Kyle Jones; Elizabeth Krupinski; J Anthony Seibert; S Jeff Shepard; Alisa Walz-Flannigan; Tariq A Mian; Matthew S Pollack Journal: J Digit Imaging Date: 2013-02 Impact factor: 4.056
Authors: Ehsan Samei; Nicole T Ranger; Alistair MacKenzie; Ian D Honey; James T Dobbins; Carl E Ravin Journal: Radiology Date: 2008-12 Impact factor: 11.105
Authors: Mi Ran Jeon; Hee Jin Park; So Yeon Lee; Kyung A Kang; Eun Young Kim; Hyun Pyo Hong; Inyoung Youn Journal: Br J Radiol Date: 2017-10-27 Impact factor: 3.039