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Congress: ECR24
Poster Number: C-19846
Type: EPOS Radiologist (educational)
DOI: 10.26044/ecr2024/C-19846
Authorblock: N. Nagy, H. Balogh, E. Juhász, P. Maurovich-Horvat, H. Sükösd; Budapest/HU
Disclosures:
Norbert Nagy: Nothing to disclose
Hanna Balogh: Nothing to disclose
Eva Juhász: Nothing to disclose
Pál Maurovich-Horvat: Nothing to disclose
Hunor Sükösd: Nothing to disclose
Keywords: Ear / Nose / Throat, Head and neck, CT-High Resolution, Education, Imaging sequences, Radiation safety, Education and training
Learning objectives To describe the temporal bone imaging acquisition protocol at our institution, using the novel photon-counting detector computed tomography (PCD-CT), and to demonstrate our experiences so far.
Read more Background Conductive hearing loss results from the disruption of the conductive ossicular chain that blocks or reduces the amplitude of sound waves reaching the inner ear. High-resolution temporal bone CT is considered the modality of choice in patients with conductive hearing loss. PCD-CT provides a more accurate representation of the temporal bone anatomy with better signal-to-noise ratio, and increased spatial resolution, however to our knowledge there is no consensus on a standardized protocol so far [1,2,3].
Read more Findings and procedure details At our institution a PCD-CT is used allowing high resolution imaging to better depict the temporal bone anatomy and to identify subtle pathologies with higher confidence. All temporal bone HRCT studies were interpreted by a board certified head and neck radiology specialist. Between January 2022 to January 2024 a total of 347 examinations were carried out using PCD-CT, with a median value of total dose-length production (tDLP) 274 mGy*cm ([Q1; Q3], [242; 313.5] mGy*cm). Data acquisition technique: According to our protocol a ...
Read more Conclusion PCD-CT with increased spatial resolution and better signal-to-noise radio is a promising tool in systematic assessment of conductive hearing loss however for an appropriate interpretation, adequate protocol, acquisition and reconstruction is essential. Given the low dose  of the imaging, the PCD-CT is favorable in pediatric use.
Read more References [1] „High-Resolution Computed Tomography Imaging in Conductive Hearing Loss: What to Look for? - ScienceDirect”. Elérés: 2024. február 2. [Online]. ElérhetÅ‘: https://www.sciencedirect.com/science/article/abs/pii/S0363018817300257[2] R. Hermans, L. Boomgaert, L. Cockmartin, J. Binst, R. De Stefanis, és H. Bosmans, „Photon-counting CT allows better visualization of temporal bone structures in comparison with current generation multi-detector CT”, Insights Imaging, köt. 14, sz. 1, o. 112, júl. 2023, doi: 10.1186/s13244-023-01467-w.[3] H. D. Curtin, „Imaging of Conductive Hearing Loss With a Normal Tympanic Membrane”, Am. J. Roentgenol.,...
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