MRI T2-Weighted Imaging and Fat-Suppressed T2-Weighted Imaging Image Fusion Technology Improves Image Discriminability for the Evaluation of Anal Fistulas

Korean Journal of Radiology : Official Journal of the Korean Radiological Society
Shi Ting FengZi Ping Li

Abstract

To explore whether MRI fusion technology (combined T2-weighted imaging [T2WI] and fat-suppressed T2WI [T2WI-FS]) improves signal differences between anal fistulas and surrounding structures. A total of 32 patients with confirmed diagnoses of anal fistula were retrospectively studied. All available T2WI and T2WI-FS images for each patient were used to generate fusion image (T2WI-Fusion) based on the addition of gray values obtained from each pixel via an MR post-processing work station. The discriminability of fistula, perianal sphincter, and perianal fat in T2WI, T2WI-FS, and T2WI-Fusion images was quantified with Fisher's scoring algorithm. For subjective visual image assessment by researchers, five-point scale scores were determined using a modified double-stimulus continuous quality-scale test to evaluate T2WI-FS, T2WI, enhanced axial three-dimensional-volumetric interpolated breath-hold examination (3D-VIBE), and T2WI-Fusion sequence images. The differences were subsequently compared. Mean Fisher scores for fistulas vs. sphincters obtained from T2WI-Fusion (FFusion-fistula = 6.56) were significantly higher than those from T2WI (FT2WI-fistula = 3.35) (p = 0.001). Mean Fisher scores for sphincters vs. fat from T2WI-Fusion (FF...Continue Reading

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Citations

Feb 7, 2020·Annals of Saudi Medicine·Khawaja Bilal WaheedZechriah Jebakumar Arulanatham
Oct 23, 2019·Evidence-based Complementary and Alternative Medicine : ECAM·Yin QuYang Wei
Nov 26, 2020·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Yeon Hyeon Choe

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Methods Mentioned

BETA
feature extraction

Software Mentioned

T2WI
Fusion
VIBE
3D
- Fusion
Syngo
FS
SPSS

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