Feasibility of vocal fold abduction and adduction assessment using cine-MRI

作者：Baki Marina Mat; Menys Alex; Atkinson David; Bassett Paul; Morley Simon; Beale Timothy; Sandhu Guri; Naduvilethil Georgekutty; Stevenson Nicola; Birchall Martin A; Punwani Shonit^*

来源：European Radiology, 2017, 27(2): 598-606.

DOI：10.1007/s00330-016-4341-3

• Vocal fold paralysis
• Magnetic resonance imaging
• Cine
• Feasibility study

Determine feasibility of vocal fold (VF) abduction and adduction assessment by cine magnetic resonance imaging (cine-MRI)
Cine-MRI of the VF was performed on five healthy and nine unilateral VF paralysis (UVFP) participants using an axial gradient echo acquisition with temporal resolution of 0.7 s. VFs were continuously imaged with cine-MRI during a 10-s period of quiet respiration and phonation. Scanning was repeated twice within an individual session and then once again at a 1-week interval. Asymmetry of VF position during phonation (VF phonation asymmetry, VFPa) and respiration (VF respiration asymmetry, VFRa) was determined. Percentage reduction in total glottal area between respiration and phonation (VF abduction potential, VFAP) was derived to measure overall mobility. An un-paired t-test was used to compare differences between groups. Intra-session, inter-session and inter-reader repeatability of the quantitative metrics was evaluated using intraclass correlation coefficient (ICC).
VF position asymmetry (VFPa and VFRa) was greater (p=0.012; p=0.001) and overall mobility (VFAP) was lower (p=0.008) in UVFP patients compared with healthy participants. ICC of repeatability of all metrics was good, ranged from 0.82 to 0.95 except for the inter-session VFPa (0.44).
Cine-MRI is feasible for assessing VF abduction and adduction. Derived quantitative metrics have good repeatability.
aEuro cent Cine-MRI is used to assess vocal folds (VFs) mobility: abduction and adduction.
aEuro cent New quantitative metrics are derived from VF position and abduction potential.
aEuro cent Cine-MRI able to depict the difference between normal and abnormal VF mobility.
aEuro cent Cine-MRI derived quantitative metrics have good repeatability.

• 出版日期2017-2