Diffusion-Weighted Imaging in the Oral and Maxillofacial Region: Usefulness of Apparent Diffusion Coefficient Maps and Maximum Intensity Projection for Characterization of Normal Structures and Lesions.

Autor: Ogura I; Department of Radiology, The Nippon Dental University Niigata Hospital, Niigata, Japan., Sasaki Y; Department of Radiology, The Nippon Dental University Niigata Hospital, Niigata, Japan., Kameta A; Department of Oral and Maxillofacial Radiology, The Nippon Dental University School of Life Dentistry at Niigata, Niigata, Japan., Sue M; Department of Radiology, The Nippon Dental University Niigata Hospital, Niigata, Japan., Oda T; Department of Radiology, The Nippon Dental University Niigata Hospital, Niigata, Japan.
Jazyk: angličtina
Zdroj: Polish journal of radiology [Pol J Radiol] 2017 Oct 20; Vol. 82, pp. 571-577. Date of Electronic Publication: 2017 Oct 20 (Print Publication: 2017).
DOI: 10.12659/PJR.902524
Abstrakt: Background: The aim of this study was to investigate diffusion-weighted imaging (DWI) in the oral and maxillofacial region, with a special focus on the usefulness of apparent diffusion coefficient (ADC) maps and maximum intensity projection (MIP) for characterization of normal structures and lesions.
Material/methods: Thirty-five patients who underwent magnetic resonance imaging (MRI) for diagnosis of oral and maxillofacial lesions were included in this prospective study. DWI was performed on a 1.5 T unit, with b factor of 0 and 800 s/mm 2 ; moreover, ADC maps were generated. ADC values were measured for normal structures, odontogenic infections, squamous cell carcinomas (SCC), and hemangiomas.
Results: As regards the normal structures, the mean ADC value of the cerebrospinal fluid (3.65±0.60×10 -3 mm 2 /s) in the upper neck area was higher than that of the spinal cord (0.74±0.15×10 -3 mm 2 /s, P=0.000), lymph nodes (0.87±0.17×10 -3 mm 2 /s, P=0.000), and Waldeyer's ring (0.92±0.29×10 -3 mm 2 /s, P=0.000). The mean ADC value of hemangiomas (1.52±0.31×10 -3 mm 2 /s) was higher than that of odontogenic infections (0.85±0.36×10 -3 mm 2 /s, P=0.034) and SCC (1.38±0.22×10 -3 mm 2 /s, P=0.840). Furthermore, MIP (DWI) showed the normal structures and lesions in the oral and maxillofacial region in an improved way.
Conclusions: DWI, ADC maps, and MIP can be used to characterize and differentiate normal structures and lesions in the oral and maxillofacial region.
Competing Interests: The authors declare that there are no actual or potential conflicts of interest in relation to this article.
Databáze: MEDLINE
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