Korean Journal of Radiology

  • 제23권8호
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  • Pages.794-802
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  • 2022
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  • 1229-6929(pISSN)
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  • 2005-8330(eISSN)
대한영상의학회 (The Korean Society of Radiology)
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Feasibility of Single-Shot Whole Thoracic Time-Resolved MR Angiography to Evaluate Patients with Multiple Pulmonary Arteriovenous Malformations

  • Jihoon Hong (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Sang Yub Lee (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Jae-Kwang Lim (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Jongmin Lee (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Jongmin Park (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Jung Guen Cha (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Hui Joong Lee (Department of Radiology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital) ;
  • Donghyeon Kim (Department of Radiology, Gyeongbuk Regional Rehabilitation Hospital)
  • 투고 : 2022.03.04
  • 심사 : 2022.06.06
  • 발행 : 2022.08.01
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초록

Objective: To evaluate the feasibility of single-shot whole thoracic time-resolved MR angiography (TR-MRA) to identify the feeding arteries of pulmonary arteriovenous malformations (PAVMs) and reperfusion of the lesion after embolization in patients with multiple PAVMs. Materials and Methods: Nine patients (8 females and 1 male; age range, 23-65 years) with a total of 62 PAVMs who underwent percutaneous embolization for multiple PAVMs and were subsequently followed up using TR-MRA and CT obtained within 6 months from each other were retrospectively reviewed. All imaging analyses were performed by two independent readers blinded to clinical information. The visibility of the feeding arteries on maximum intensity projection (MIP) reconstruction and multiplanar reconstruction (MPR) TR-MRA images was evaluated by comparing them to CT as a reference. The accuracy of TR-MRA for diagnosing reperfusion of the PAVM after embolization was assessed in a subgroup with angiographic confirmation. The reliability between the readers in interpreting the TR-MRA results was analyzed using kappa (κ) statistics. Results: Feeding arteries were visible on the original MIP images of TR-MRA in 82.3% (51/62) and 85.5% (53/62) of readers 1 and 2, respectively. Using the MPR, the rates increased to 93.5% (58/62) and 95.2% (59/62), respectively (κ = 0.760 and 0.792, respectively). Factors for invisibility were the course of feeding arteries in the anteroposterior plane, proximity to large enhancing vessels, adjacency to the chest wall, pulsation of the heart, and small feeding arteries. Thirty-seven PAVMs in five patients had angiographic confirmation of reperfusion status after embolization (32 occlusions and 5 reperfusions). TR-MRA showed 100% (5/5) sensitivity and 100% (32/32, including three cases in which the feeding arteries were not visible on TR-MRA) specificity for both readers. Conclusion: Single-shot whole thoracic TR-MRA with MPR showed good visibility of the feeding arteries of PAVMs and high accuracy in diagnosing reperfusion after embolization. Single-shot whole thoracic TR-MRA may be a feasible method for the follow-up of patients with multiple PAVMs.

키워드

과제정보

We would like to thank Wade Martin of Emareye Medical Editing for his critical revision of this manuscript.

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