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The effect of heart rate on coronary plaque measurements in 320-row coronary CT angiography.
Kidoh, Masafumi; Utsunomiya, Daisuke; Funama, Yoshinori; Sakabe, Daisuke; Oda, Seitaro; Nakaura, Takeshi; Yuki, Hideaki; Nagayama, Yasunori; Hirata, Kenichiro; Iyama, Yuji; Namimoto, Tomohiro; Yamashita, Yasuyuki.
Afiliación
  • Kidoh M; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan. masafkidoh@yahoo.co.jp.
  • Utsunomiya D; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Funama Y; Department of Medical Physics, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Sakabe D; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Oda S; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Nakaura T; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Yuki H; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Nagayama Y; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Hirata K; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Iyama Y; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Namimoto T; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
  • Yamashita Y; Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, 1-1-1, Honjo, Kumamoto, 860-8556, Japan.
Int J Cardiovasc Imaging ; 34(12): 1977-1985, 2018 Dec.
Article en En | MEDLINE | ID: mdl-30030671
Repeatability of quantitative assessment of atherosclerotic plaques is important for the accurate detection of high-risk plaques in coronary CT angiography (CTA). We assessed the effect of heart rate (HR) on plaque CT number using a coronary artery model and a cardiac phantom capable of simulating cardiac motion. The coronary artery model with luminal stenosis on a cardiac phantom was imaged with a simulated HR of 0, 50, 60, and 70 beats per minute using a 320-row CT scanner. We reconstructed CT images for cardiac diastolic phases (for 75% R-R interval) using filtered back projection (FBP), hybrid iterative reconstruction (AIDR3D), and model-based iterative reconstruction (FIRST). Two observers measured plaque attenuation in the lesion with 75% stenosis. The coefficient of determination (R2) was obtained to evaluate interobserver agreement. At HR 70, FIRST improved the correlation between two observers compared with FBP and AIDR3D (FIRST: R2 = 0.68, p < 0.05; FBP: R2 = 0.29, p = 0.31; AIDR3D: R2 = 0.22, p = 0.18). These R2 at HR 70 were lower compared with at HR 50 (FIRST: R2 = 0.92, p < 0.05; FBP: R2 = 0.83, p < 0.05; AIDR3D: R2 = 0.87, p < 0.05) and HR 0 (FIRST: R2 = 0.97, p < 0.05; FBP: R2 = 0.89, p < 0.05; AIDR3D: R2 = 0.95, p < 0.05). Higher HR affected plaque measurement repeatability in coronary CTA. FIRST may improve plaque measurement repeatability at the higher HR compared with FBP and AIDR3D.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedad de la Arteria Coronaria / Angiografía Coronaria / Vasos Coronarios / Placa Aterosclerótica / Tomografía Computarizada Multidetector / Angiografía por Tomografía Computarizada / Frecuencia Cardíaca Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Int J Cardiovasc Imaging Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2018 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedad de la Arteria Coronaria / Angiografía Coronaria / Vasos Coronarios / Placa Aterosclerótica / Tomografía Computarizada Multidetector / Angiografía por Tomografía Computarizada / Frecuencia Cardíaca Tipo de estudio: Prognostic_studies Límite: Humans Idioma: En Revista: Int J Cardiovasc Imaging Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2018 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos