Dual energy CT in acute appendicitis: value of low mono-energy
| Autor: | Noam Shussman, Yuval Meir, Jacob Sosna, Gili Dar, S. Nahum Goldberg, Naama Lev-Cohain, Isaac Leichter, Nadia Caplan |
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| Rok vydání: | 2021 |
| Předmět: |
Contrast Media
Signal-To-Noise Ratio 030218 nuclear medicine & medical imaging Radiography Dual-Energy Scanned Projection 03 medical and health sciences 0302 clinical medicine McNemar's test Contrast-to-noise ratio medicine Humans Radiology Nuclear Medicine and imaging Retrospective Studies business.industry Retrospective cohort study Appendicitis medicine.disease Appendix medicine.anatomical_structure 030220 oncology & carcinogenesis Acute appendicitis Dual energy ct Tomography X-Ray Computed business Nuclear medicine Bowel wall |
| Zdroj: | Clinical Imaging. 77:213-218 |
| ISSN: | 0899-7071 |
| Popis: | OBJECTIVES To assess the potential role of low monoenergetic images in the evaluation of acute appendicitis. METHODS A retrospective study of 42 patients with pathology proven acute appendicitis underwent contrast-enhanced-CT conducted on a single-source-DECT before surgery. Attenuation, SNR, and CNR were calculated on both monoenergetic and conventional images and compared to 24 abdominal CT-scans with normal appendix. Representative conventional and monoenergetic images were randomized and presented side-by-side to three abdominal radiologists to determine preferred images for detecting inflammation. Additionally, six individual acute inflammatory characteristics were graded on a 1-5 scale to determine factors contributing to differences between conventional and monoenergetic images by 2 abdominal radiologists. Paired t-tests, Wilcoxon and McNemar tests, and intra-observer error statistics were performed. RESULTS For the inflamed appendixes monoenergetic images had overall increased attenuation (average ratio 1.7; P |
| Databáze: | OpenAIRE |
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