{
  "abstract": "Microwave ablation (MWA) is a percutaneous ablation that induces thermal necrosis by generating localized high-temperature regions within tumor tissue. However, when a tumor is located close to a large vessel such as the aorta, blood flow continuously removes heat from the ablation zone. This phenomenon causes the vascular heat-sink effect and thereby increases the risk of incomplete ablation. This study constructs an ANSYS-based numerical framework to investigate the heat-sink effect during MWA of tumors located close to the aorta. The computational model consists of the tumor, surrounding tissue, vessel wall, blood flow domain, and microwave antenna. Microwave-induced heating was represented by an equivalent heat source mapped from the High-Frequency Structure Simulator (HFSS)-derived volume loss density, rather than by direct electromagnetic-thermal coupling within the thermal-fluid solver. Two parametric studies were performed to quantify the heat-sink effect. First, the tumor-aorta distance was varied at D = 0 mm, 4 mm, and 8.5 mm to assess how vessel proximity affects temperature elevation and ablation zone formation. Second, at each tumor-aorta distance, three blood-flow conditions were compared: no blood, stagnant blood V = 0 m/s, and normal aortic blood flow V=0.65 m/s. This comparison enabled the heat-sink effect of blood flow to be independently evaluated. The results highlight the clinical need for simulation-based treatment planning in patients with tumors located close to major vessels.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.12407",
  "author_total": 3,
  "authors": [
    {
      "name": "Youjin Kim"
    },
    {
      "name": "Kyungho Yoon"
    },
    {
      "name": "Minwoo Shin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/944qspyqcwer5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.12407",
  "fulltext_url": null,
  "id": "944qspyqcwer5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.12407",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.NA"
    ],
    [
      "arxiv",
      "math.NA"
    ],
    [
      "openalex",
      "2204|Ultrasound and Hyperthermia Applications"
    ]
  ],
  "openalex": "W7212881082",
  "pdf_url": "https://arxiv.org/pdf/2609.12407",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/944qspyqcwer5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:11Z",
      "native_id": "2609.12407",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.12407"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.NA",
      "subfield": "numerical-analysis"
    }
  ],
  "title": "3D Computational Modeling of the Vascular Heat-Sink Effect in Microwave Ablation of Tumors Close to the Aorta",
  "title_text": "3D Computational Modeling of the Vascular Heat-Sink Effect in Microwave Ablation of Tumors Close to the Aorta",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:11Z",
  "url": "https://research.draconitic.com/paper/944qspyqcwer5",
  "venue": "arXiv",
  "versions": []
}