{
  "abstract": "Introduction Conventional X-rays have so far been used for the radiological monitoring of ventriculoperitoneal (VP) shunts. The cumulative radiation dose is not negligible. Photon counting computed tomography enables good image quality even with low-dose protocols.Aim of study The aim of this study was to compare the radiation doses of ultra-low dose PCCT with conventional radiographic VP shunt series in the assessment of shunt pathways in adults.Method This retrospective study included 15 ultra-low dose non-contrast PCCT scans in adults (covering the VP shunt pathway from the skull or temporal bone to the ischium) and 52 radiographic VP shunt (each with a.p. skull, a.p. chest, a.p. and lateral abdomen). The effective doses from both imaging modalities were compared using the Mann-Whitney U test.Results Ultra-low dose PCCT had a significantly lower radiation dose in terms of effective dose compared to the radiographic shunt series, with an estimated median effective dose of 0.12 mSv (IQR 0.10–0.17 mSv, including the topogram) compared to the estimated median total effective dose for the radiographic VP shunt series of 0.31 mSv (IQR 0.22–0.46 mSv) (p<0.001). This results in a 60% median radiation dose reduction with PCCT compared to conventional shunt series.Conclusion Ultra-low dose PCCT provides a significant reduction in radiation dose of approximately 60% compared to conventional X-ray series for assessing VP shunts in adults, with the added benefit of superior visualisation. However, availability and cost must also be considered.Conflict of Interest Yes J.R. Kroeger received research support from Philips, support for attending meetings and/or travel from Veryan, honoraria for scientific lectures from GE Healthcare and honoraria for clinical advisory board membership from Siemens Healthineers. J. Borggrefe received honoraria for scientific lectures from Siemens Healthineers and Philips Healthcare.",
  "authors": [
    {
      "affiliations": [
        "Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Denise Schönbeck"
    },
    {
      "affiliations": [
        "Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Sebastian Horstmeier"
    },
    {
      "affiliations": [
        "Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Christoph Moenninghoff"
    },
    {
      "affiliations": [
        "Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Jan Borggrefe"
    },
    {
      "affiliations": [
        "Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Jan Robert Kröger"
    },
    {
      "affiliations": [
        "Department of Radiology, Neuroradiology and Nuclear Medicine, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Arwed Michael"
    },
    {
      "affiliations": [
        "Siemens Healthineers GmbH, 91052 Erlangen, Germany"
      ],
      "name": "Iram Shahzadi"
    },
    {
      "affiliations": [
        "Department of Neurosurgery, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Ulrich Knappe"
    },
    {
      "affiliations": [
        "Department of Neurosurgery, Johannes Wesling University Hospital, Ruhr University Bochum, Bochum, Germany, Minden, Germany"
      ],
      "name": "Ali Alomari"
    },
    {
      "affiliations": [
        "Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University of Duisburg-Essen, Germany, Essen, Germany"
      ],
      "name": "Cornelius Deuschl"
    },
    {
      "affiliations": [
        "Institute for Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany"
      ],
      "name": "Michael Forsting"
    },
    {
      "affiliations": [
        "Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, University of Duisburg-Essen, Germany, Essen, Germany"
      ],
      "name": "Denise Bos"
    }
  ],
  "title": "A58 Radiation dose reduction with ultra-low dose photon-counting CT for adult ventriculoperitoneal shunt assessment compared to conventional X-ray",
  "uid": "de9ada36-c816-5e6e-9849-86654d6c948e"
}