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Factors affecting patient movement and re-exposure in cone beam computed tomography examination
Rubens Spin-Neto1, Louise Hauge Matzen1, Lars Schropp1
1Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark.
Objective:
To assess operator-, examination-, and patient-related factors, affecting patient movement and re-exposure in cone beam computed tomography (CBCT) examination.
Study Design:
The sample consisted of 248 CBCT examinations in 190 patients video-recorded during examination. Three observers scored the videos; the patient moved or did not move. Operator-, examination-, and patient-related factors were evaluated separately (chi-square test) and by multivariate regression analyses (patient movement and re-exposure as separate outcomes).
Results:
The prevalence of movement was 21%. Cotton roll stabilizing patient's jaws, CBCT unit touching patient's hair, and patient's age 15 years or greater were related to movement. Age 15 years or greater had a significant impact on movement (P < .001; odds ratio [OR] 11.0). There were 16 re-exposures (6.4%). Age 15 years or greater, presence of a cotton roll, and field of view (FOV) were related to re-exposure. Use of a large FOV had significant impact on re-exposure (P = .04; OR 5.8).
Conclusions:
Operator-, examination-, and patient-related factors may affect patient movement and re-exposure in CBCT examination.
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