Results 51 to 60 of about 5,341 (200)
The Impact of CARE kV Technology on Radiation Dose in Coronary Computed Tomography Angiography
CT Lilun yu yingyong yanjiuObjective: To investigate the impact of CARE kV technology on radiation dose in coronary computed tomography angiography (CCTA). Methods: This retrospective study analyzed data from 1,529 patients who underwent CCTA at The First Affiliated Hospital of ...
Xinnan SHEN +5 more
doaj +1 more source
Paediatric computed tomography diagnostic reference levels in Africa: A systematic review
Journal of Medical Radiation Sciences, Volume 72, Issue 1, Page 139-147, March 2025.Improvements in computed tomography (CT) technology have increased its applications in medical imaging. Variations in the paediatric DRLs indicate that harmonisation and standardisation of paediatric CT protocols are essential for the optimisation of paediatric doses. Abstract Introduction Improvements in computed tomography (CT) technology in terms of
Emmanuel Gyan +3 more
wiley +1 more source
Journal of Medical Radiation Sciences, Volume 72, Issue 1, Page 85-92, March 2025.This study established that patient's lateral width measurements made from scanned projection radiograph (SPR) is an overestimate compared to those measured from tomographic slices by about 10%. Size‐specific dose estimates (SSDE) calculated using lateral width measured from SPR correlates well with SSDE calculated using water equivalent diameter of ...
Ajit Brindhaban
wiley +1 more source
The Kaohsiung Journal of Medical Sciences, Volume 42, Issue 11, November 2026.ABSTRACT This study aimed to evaluate the hemodynamic significance of in‐stent restenosis (ISR) by using a combined anatomical‐functional approach with photon‐counting CT coronary angiography (APEX‐CT CTA) and dynamic CT myocardial perfusion imaging (CT‐MPI). We prospectively enrolled 239 symptomatic patients at least 9 months after PCI.
Liang‐Shi Wang +6 more
wiley +1 more source
Medical Physics, Volume 53, Issue 11, November 2026.Abstract Background Over the past decades, efforts have been directed toward increasing the sensitivity of PET systems to enable low‐dose PET imaging and shorter scan times. The Biograph Vision Quadra PET/CT scanner (Siemens Healthineers, Knoxville, TN, USA) combines an increased solid angle coverage with time of flight, enabling a significant ...
Vanessa Nadig +9 more
wiley +1 more source
Double‐bowtie filter design for pediatric spectral CT imaging: A fan beam simulation study
Medical Physics, Volume 53, Issue 11, November 2026.Abstract Background Despite concerns about radiation dose in pediatric patients, computed tomography (CT) remains a first‐line imaging modality for children. Spectral CT provides additional diagnostic information that benefits pediatric imaging. However, most existing spectral CT systems are primarily optimized for adult patients.
Yinglin Ge +9 more
wiley +1 more source
Establishment of local diagnostic reference levels for CT colonography at a tertiary hospital
South African Journal of RadiologyBackground: Diagnostic reference levels (DRLs) are an important metric in identifying abnormally high radiation doses in diagnostic examinations. National DRLs for CT colonography do not currently exist in South Africa, but there are efforts to collect ...
Filip M. Kozłowski +2 more
doaj +1 more source
Jurnal Fisika, 2022 SSDE (Size-Specific Dose Estimate), merupakan parameter dosis CT Scan yang sudah memasukkan komponen ukuran tubuh pasien, yaitu diameter efektif (DE). SSDEDE kurang menggambarkan dosis pasien karena pengukuran DE hanya pada midslice citra. Penelitian ini
Ni Larasati Kartika Sari +2 more
doaj +1 more source
BMC Medical Imaging, 2022 Introduction Diagnostic Reference Levels (DRLs), typically set at the 75th percentile of the dose distribution from surveys conducted across a broad user base using a specified dose-measurement protocol, are recommended for radiological examinations ...
Geoffrey Erem +7 more
doaj +1 more source
Journal of Applied Clinical Medical Physics, Volume 27, Issue 10, October 2026.Abstract Background The task‐based assessment of image quality in computed tomography (CT) is increasingly used for benchmarking, optimizing acquisition and reconstruction parameters, and predicting observers’ performance. To achieve consistent and reproducible results rely on standardized methodologies and guidelines.
Pascal Monnin +10 more
wiley +1 more source