Effect of patient anxiety on image motion artefacts in CBCT

Elif Yıldızer Keriş

doi:10.1186/s12903-017-0367-4

Abstract

BackgroundArtefacts in images related to patient movement decrease image quality, potentially necessitating re-scanning, which leads to an extra radiation dose for the patient. Thus, avoiding patient motion reduces patient exposure to radiation. The aim of this study was to analyse image motion artefacts (MAs) and how they are affected by patient anxiety during cone beam computed tomography (CBCT) examination.MethodsA total of 100 patients undergoing CBCT examination were investigated. The State Trait Anxiety Inventory (STAI-S and STAI-T) form was used to measure patient anxiety. Patient’s age, gender, dental anxiety score, diagnostic reason for CBCT examination, field of view (FOV), acquisition time, anatomical area, and presence of motion artefacts on images were recorded. Comparisons of the parameters were evaluated using Pearson’s correlation, the chi-square test, the Mann-Whitney U test, the Kruskal-Wallis test and t-tests. The significance level was set at 0.05.ResultsThe mean values of the scores for the total population were 37.2 for the STAI-S and 41.6 for the STAI-T. Women exhibited higher anxiety levels than men. The patients’ anxiety scores were significantly correlated with dental fear. The prevalence of patients showing motion artefacts was 6%. The mean age of patients with motion artefacts on their images (56.83) was higher than that of patients without (39.14). There was no relationship between motion artefact presence and patient gender, anxiety score, diagnostic reason for CBCT examination, FOV, acquisition time, or anatomical area. Patients showing motion artefacts on their images had higher STAI scores than those with no motion artefacts (non-significant).ConclusionsThe population in this study experienced anxiety before CBCT scanning. Excessive anxiety did not clearly affect whether image motion artefacts were generated during CBCT examination, although a non-significant increase in STAI scores was noticed in patients with motion artefacts on their images.

Highlights

Artefacts in images related to patient movement decrease image quality, potentially necessitating re-scanning, which leads to an extra radiation dose for the patient
A non-significant negative relationship with a very low level (p > 0.05, r = −0.94, Pearson correlation) was found between State Trait Anxiety Inventory (STAI)-S score and patient age, a non-significant positive relationship with a very low level (p > 0.05, r = 0.12, Pearson correlation) was found between State Trait Anxiety Inventory Trait (STAI-T) score and patient age, and a significant negative association was found between Dental Anxiety Scale (DAS) score and patient age (p < 0.05, r = −0.209, Pearson correlation)
Correlations between anxiety score, gender and diagnostic reason for cone beam computed tomography (CBCT) imaging are provided in Tables 2 and 3

Summary

Introduction

Artefacts in images related to patient movement decrease image quality, potentially necessitating re-scanning, which leads to an extra radiation dose for the patient. The aim of this study was to analyse image motion artefacts (MAs) and how they are affected by patient anxiety during cone beam computed tomography (CBCT) examination. MAs are a general problem in radiology because the primary principals of radiology are to reduce radiation exposure to patients and to ensure the best image quality. Patients are asked to remain still during CBCT examinations to prevent MAs. even though CBCT scans last only seconds (6–36 s), patients still move during. Even though CBCT scans last only seconds (6–36 s), patients still move during To overcome this problem, the causes of patient movement must be clearly identified. Studies investigating MAs in maxillofacial CBCT images and patient movement during CBCT scanning are limited. It is important to assess patient characteristics because MAs are related to patients

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