Abstract

Objective: This study compared the height, width, length, and volume of the maxillary sinus in Magnetic Resonance Imaging (MRI) and Cone-Beam Computed Tomography (CBCT).

Methods: Eleven human subjects participated in the study (mean age of 14y7m). One CBCT scan and one MRI scan were performed on each patient. CBCT images were captured with an 18 x16 inch field of view that covered the whole head. Contiguous sagittal MR images of the whole head were produced using a 3.0T imaging system with a T1-weighted 3D imaging sequence and isotropic resolution of 1.0 x1.0 x1.0 mm. Images were imported as DICOM files into Simpleware Scan IP (v.2018-03), and registered in three planes of space. CBCT and MRI were measured and segmented separately. Volume was calculated using a 3D model of the sinuses. Maxillary sinus height, width, length were measured on the un-segmented digital images. Statistical analysis was performed by using Intraclass correlation coefficient (ICC) and by generating Bland- Altman plots. All tests of hypotheses were two-way and conducted at an α = 0.05 using SPSS (Chicago, IL).

Results: The results indicate excellent agreement between CBCT and MRI measurements. Mean Intraobserver ICC were 0.999 - 1.000 for CBCT and 0.993 - 0.998 for MRI. Average ICC to assess agreement between CBCT and MRI were 0.991-0.997. There was no statistically significant systematic bias when comparing CBCT and MRI measurements (p > 0.05) for all but one measurement. There was a systematic bias of 1.27cm3 (p = 0.016) for the left MRI maxillary sinus volume. Conclusion: Measurements of the maxillary sinus made on MRI are in good agreement with equivalent CBCT measurements. These results indicate that further studies are warranted to characterize the interchangeability of CBCT and MRI for the purpose of maxillary sinus analysis. MRI could be an attractive alternative to CBCT because it does not expose patients to ionizing radiation, and is the highest contrast resolution medical imaging technique

LLU Discipline

Orthodontics and Dentofacial Orthopedics

Department

Orthodontics and Dentofacial Orthopedics

School

School of Dentistry

First Advisor

V. Leroy Leggitt

Second Advisor

James R. Farrage

Third Advisor

Roland Neufeld

Fourth Advisor

Gina Roque-Torres

Degree Name

Master of Science in Orthodontics and Dentofacial Orthopedics (MSODO)

Degree Level

M.S.

Year Degree Awarded

2019

Date (Title Page)

9-2019

Language

English

Library of Congress/MESH Subject Headings

Maxillary Sinus -- diagnostic imaging; Spiral Cone-Beam Computed Tomography; Magnetic Resonance Imaging

Type

Thesis

Page Count

x, 31, 1 p.

Digital Format

PDF

Digital Publisher

Loma Linda University Libraries

Usage Rights

This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.

Collection

Loma Linda University Electronic Theses and Dissertations

Collection Website

http://scholarsrepository.llu.edu/etd/

Repository

Loma Linda University. Del E. Webb Memorial Library. University Archives

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