ArticleJournal of applied clinical medical physics2024
Optimization of photon counting CT for cardiac imaging in patients with left ventricular assist devices: An in-depth assessment of metal artifacts.
Article in Journal of applied clinical medical physics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Photon-counting CT: image quality evaluation in patients with tibial plateau fracture treated with metallic osteosynthesis material.European radiology experimental · 2026Article
- Improving cardiac computed tomography angiography image quality and diagnostic confidence for atrial fibrillation after left atrial appendage closure using a second-generation whole-heart motion correction algorithm.Quantitative imaging in medicine and surgery · 2026Article
- Assessment of metal artifacts from titanium wrist prostheses: photon-counting versus energy-integrating detector CT.European radiology experimental · 2025Article
- Optimization of photon counting CT for cardiac imaging in patients with left ventricular assist devices: An in-depth assessment of metal artifacts.Journal of applied clinical medical physics · 2024Article
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Authors and funding
6 authors.
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Abstract
purposePhoton counting CT (PCCT) holds promise for mitigating metal artifacts and can produce virtual mono-energetic images (VMI), while maintaining temporal resolution, making it a valuable tool for characterizing the heart. This study aimed to evaluate and optimize PCCT for cardiac imaging in patients during left ventricular assistance device (LVAD) therapy by conducting an in-depth objective assessment of metal artifacts and visual grading.
methodsVarious scan and reconstruction settings were tested on a phantom and further evaluated on a patient acquisition to identify the optimal protocol settings. The phantom comprised an empty thoracic cavity, supplemented with heart and lungs from a cadaveric lamb. The heart was implanted with an LVAD (HeartMate 3) and iodine contrast. Scans were performed on a PCCT (NAEOTOM Alpha, Siemens Healthcare). Metal artifacts were assessed by three objective methods: Hounsfield units (HU)/SD measurements (Diff
resultsDue to blooming artifacts, the LVAD volume fluctuated between 27.0 and 92.7 cm
conclusionWe found that optimal scan settings for LVAD imaging involved using 120 kVp and IQ level 80. Employing T3D with pacemaker iMAR, the sharpest allowed vascular kernel (Bv56f), and VMI at 110 keV with kernel Qr40 yields images suitable for cardiac imaging during LVAD-therapy. Volumetric measurements of the LVAD for determination of the extent of blooming artifacts was shown to be the best objective method to assess metal artifacts.
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