مورد إلكتروني
Assessment of image quality in photon-counting detector computed tomography of the wrist - An ex vivo study
| العنوان: | Assessment of image quality in photon-counting detector computed tomography of the wrist - An ex vivo study |
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| المؤلفون: | Kämmerling, Nina, Sandstedt, Mårten, Farnebo, Simon, Persson, Anders, Tesselaar, Erik |
| بيانات النشر: | Linköpings universitet, Institutionen för hälsa, medicin och vård Linköpings universitet, Medicinska fakulteten Region Östergötland, Röntgenkliniken i Linköping Linköpings universitet, Avdelningen för diagnostik och specialistmedicin Linköpings universitet, Centrum för medicinsk bildvetenskap och visualisering, CMIV Linköpings universitet, Avdelningen för kirurgi, ortopedi och onkologi Region Östergötland, Hand- och plastikkirurgiska kliniken US Region Östergötland, Medicinsk strålningsfysik Elsevier Ireland Ltd 2022 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Purpose: The aim of this study was to evaluate the effect of reconstruction parameters on image quality in wrist imaging using photon-counting detector CT (PCD-CT) and to compare the results with images from an energyintegrating detector CT (EID-CT). Methods: Twelve cadaveric wrist specimens were examined using a prototype PCD-CT and a clinical EID-CT using similar radiation dose. Reconstruction parameters were matched between scanners. Also, sharper reconstruction kernels, a larger matrix size, and smaller slice thicknesses were evaluated for PCD-CT. Image noise, contrast-tonoise ratio (CNR) and image sharpness in trabecular structures were quantitatively measured. Image quality with respect to the visibility of cortical and trabecular bone structures was assessed by six radiologists using visual grading methods.Results: Images obtained with PCD-CT had lower noise (42.6 +/- 3.9 HU vs 75.1 +/- 6.3 HU), higher CNR (38.9 +/- 4.5 vs 19.0 +/- 2.4) and higher trabecular sharpness (63.5 +/- 6.0 vs 53.7 +/- 8.5) than those obtained with EID-CT using similar scan and reconstruction parameters (p < 0.001). The image sharpness in trabecular structures was further improved by using sharper kernels, despite higher noise levels. Radiologists had a strong preference for PCD-CT images both in terms of spatial resolution and suitability for bone imaging. Visual grading analysis showed an improved visibility of cortical bone, trabeculae and nutritive canals (p < 0.005).Conclusion: PCD-CT offers improved image quality regarding bone structures in the wrist relative to EID-CT systems, particularly when sharper reconstruction kernels, smaller slice thickness and a larger image matrix size are used. Funding Agencies|ALF Grants [RO?] |
| مصطلحات الفهرس: | Computed tomography; Wrist; Diagnostic imaging; Image quality enhancement; Bone, Medical Image Processing, Medicinsk bildbehandling, Article in journal, info:eu-repo/semantics/article, text |
| DOI: | 10.1016.j.ejrad.2022.110442 |
| URL: | European Journal of Radiology, 0720-048X, 2022, 154 |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/openAccess |
| ملاحظة: | application/pdf English |
| أرقام أخرى: | UPE oai:DiVA.org:liu-187292 0000-0002-9446-6981 doi:10.1016/j.ejrad.2022.110442 PMID 35849959 ISI:000835162300007 1348928349 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1348928349 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1016.j.ejrad.2022.110442 |
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