Investigating the Usefulness of Breath-holding Instructions by Change in the Room Light for the Hearing Impaired

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  • 聴覚障害者に対する部屋の明るさの変化による呼吸停止指示の有用性の検討
  • チョウカク ショウガイシャ ニ タイスル ヘヤ ノ アカルサ ノ ヘンカ ニ ヨル コキュウ テイシ シジ ノ ユウヨウセイ ノ ケントウ

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<p> Purpose: In imaging examinations of patients with hearing impairment, poor image quality due to poor respiratory arrest is a problem directly related to diagnostic imaging. Although there have been studies of non-sound instructions, there have been few quantitative studies using changes in brightness. The purpose of this study was to investigate whether changes in room brightness can be used as a respiratory cessation indicator. Methods: Fourteen patients were imaged using the 2D FIESTA and LAVA-Flex methods on an MRI system under free respiration, voice-guided cessation of respiration (voice instruction), and room brightness change (light/dark instruction), and compared. Results: The positional fluctuation of the top of the liver by the 2D FIESTA method showed a large positional fluctuation under free breathing, while the positional fluctuation was small under voice instruction and light/dark instruction. The images obtained by the LAVA-Flex method was significantly degraded by motion artifacts under free breathing, whereas there were fewer motion artifacts under voice instruction and light/dark instruction, and the two were the same with no significant difference in visual evaluation. Conclusion: The visual cessation of respiration instruction by changing the brightness of the room is as effective as the audible cessation of respiration instruction, suggesting that it can be applied clinically.</p>

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