Comparison of Ultrasonography, Magnetic Resonance Imaging and Cone Beam Computed
Tomography for Detection of Foreign Bodies in Maxillofacial Region
#MMPMID28571230
Shokri A
; Jamalpour M
; Jafariyeh B
; Poorolajal J
; Sabet NK
J Clin Diagn Res
2017[Apr]; 11
(4
): TC15-TC19
PMID28571230
show ga
INTRODUCTION: Foreign Bodies (FBs) entrapped in the maxillofacial region have a
high prevalence due to trauma and accidents. Accurate localization of FBs and
verifying their type and size are critical to assist the surgeon in their fast
retrieval with minimal tissue damage. AIM: To assess and compare the imaging
modalities including MRI, ultrasonography and Cone Beam Computed Tomography
(CBCT) for detection of different types of FBs. MATERIALS AND METHODS: In this
study, four types of FBs including pieces of normal glass, barium glass, wood and
pebbles with equal sizes were placed randomly in two sheep heads in different
locations such as upper lip, maxillary sinus and body of mandible as FBs and
subjected to MRI, ultrasound and CBCT. The images were interpreted by expert
observers and the data was analysed using the stata 11 software, kappa test and
chi-square test. RESULTS: Sensitivity of CBCT, MRI and ultrasound for detecting
foreign bodies was 79.19%, 20.83% and 33.33%, respectively. None of the imaging
modalities could clearly visualize wooden FBs. Among different FBs, pebbles and
barium glass were detected more accurately by radiographic imaging technique. The
sensitivity of CBCT, ultrasound and MRI for pebbles was 100%, 33.33% and 16.67%,
respectively. The sensitivity of CBCT, ultrasound and MRI for barium glass was
100%, 33.33% and 41.69%, respectively. The sensitivity of CBCT, ultrasound and
MRI for wood was 33.33%, 33.33% and 16.67%, respectively. Specificity of all
three imaging modalities was 100%. Diagnostic accuracy of all three imaging
modalities was higher for detection of FBs in the upper lip than those in the
body of mandible, and FBs in the latter location had higher detection accuracy
than those in the maxillary sinus. CONCLUSION: Among the three imaging
modalities, CBCT had the highest diagnostic sensitivity for the examined FBs. The
highest diagnostic sensitivity was noted for pebbles and barium glass.
free
free
free
