Accuracy of ultra-high–resolution computed tomography with a 0.3-mm detector for quantitative assessment of coronary artery stenosis grading in comparison with conventional computed tomography: A phantom study
| Autor: | Minoru Yamada, Sachio Kuribayashi, Takehiro Nakahara, Takayuki Abe, Yoshitake Yamada, Masahiro Jinzaki, Shigeo Okuda |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
medicine.diagnostic_test
Phantoms Imaging business.industry Detector Coronary Stenosis Computed tomography Constriction Pathologic Coronary stenosis Coronary Angiography Ultra high resolution Imaging phantom Predictive Value of Tests Quantitative assessment Humans Medicine Radiology Nuclear Medicine and imaging Tomography X-Ray Computed Cardiology and Cardiovascular Medicine business Nuclear medicine Grading (tumors) |
| Zdroj: | Journal of Cardiovascular Computed Tomography. 16:239-244 |
| ISSN: | 1934-5925 |
| Popis: | The development of ultra-high-resolution CT (U-HRCT) is expected to improve the accuracy of coronary stenosis evaluation. This study aimed to evaluate the accuracy of the stenosis severities of coronary artery phantoms estimated using U-HRCT by comparing them to those estimated with conventional CT.Coronary artery phantoms with non-calcified and calcified lesions were scanned with conventional CT (64-row × 0.625 mm) and U-HRCT (32-row × 0.3125 mm). The coronary artery phantoms had lumen diameters of 2.0, 3.0, and 4.0 mm with non-calcified lesions representing 0%, 25%, 50%, and 75% stenosis and 3.0 and 4.0 mm with calcified lesions representing 0%, 25%, 50%, and 75% stenosis. The lumen diameters at the stenotic and non-stenotic regions were measured, and the stenosis severities were compared with the true values.For non-calcified lesions, conventional CT significantly underestimated the stenosis severity in the phantom showing 75% stenosis with lumen diameters of 2.0 and 3.0 mm (p 0.05), while the estimated stenosis severities were not significantly different from the true values at all settings with U-HRCT. For the calcified lesions, conventional CT overestimated the stenosis severities at all settings (p 0.05), while U-HRCT yielded estimations closer to the true values, although still with some overestimation (p 0.05).By using U-HRCT, the estimated stenosis severities of the coronary artery with non-calcified lesion become almost equal to the true value, while those with calcified lesion are still overestimated although they become closer to the true value. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect