Influence of region-of-interest designs on quantitative measurement of multimodal imaging of MR non-enhancing gliomas.

Abstract:

:A number of studies have revealed the usefulness of multimodal imaging in gliomas. Although the results have been heavily affected by the method used for region of interest (ROI) design, the most discriminatory method for setting the ROI remains unclear. The aim of the present study was to determine the most suitable ROI design for 18F-fluorodeoxyglucose (FDG) and 11C-methionine (MET) positron emission tomography (PET), apparent diffusion coefficient (ADC), and fractional anisotropy (FA) obtained by diffusion tensor imaging (DTI) from the viewpoint of grades of non-enhancing gliomas. A total of 31 consecutive patients with newly diagnosed, histologically confirmed magnetic resonance (MR) non-enhancing gliomas who underwent FDG-PET, MET-PET and DTI were retrospectively investigated. Quantitative measurements were performed using four different ROIs; hotspot/tumor center and whole tumor, constructed in either two-dimensional (2D) or three-dimensional (3D). Histopathological grading of the tumor was considered as empirical truth and the quantitative measurements obtained from each ROI was correlated with the grade of the tumor. The most discriminating ROI for non-enhancing glioma grading was different according to the different imaging modalities. 2D-hotspot/center ROI was most discriminating for FDG-PET (P=0.087), ADC map (P=0.0083), and FA map (P=0.25), whereas 3D-whole tumor ROI was best for MET-PET (P=0.0050). In the majority of scenarios, 2D-ROIs performed better than 3D-ROIs. Results from the image analysis using FDG-PET, MET-PET, ADC and FA may be affected by ROI design and the most discriminating ROI for non-enhancing glioma grading was different according to the imaging modality.

journal_name

Oncol Lett

journal_title

Oncology letters

authors

Takano K,Kinoshita M,Arita H,Okita Y,Chiba Y,Kagawa N,Watanabe Y,Shimosegawa E,Hatazawa J,Hashimoto N,Fujimoto Y,Kishima H

doi

10.3892/ol.2018.8319

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

7934-7940

issue

5

eissn

1792-1074

issn

1792-1082

pii

OL-0-0-8319

journal_volume

15

pub_type

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