Effect of Patient Characteristics on Vessel Enhancement at Lower Extremity CT Angiography
| Autor: | Masao Kiguchi, Naoyuki Imada, Takeshi Nakaura, Takanori Masuda, Yukari Yamashita, Tomoyasu Sato, Kazuo Awai, Yoshinori Funama, Toru Higaki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Contrast medium
Cardiac output Adult Male Body Surface Area Computed Tomography Angiography Patient characteristics Contrast Media 030204 cardiovascular system & hematology 030218 nuclear medicine & medical imaging Body Mass Index 03 medical and health sciences 0302 clinical medicine medicine.artery medicine Humans Radiology Nuclear Medicine and imaging Popliteal Artery Cardiovascular Imaging Aged Body surface area Aged 80 and over medicine.diagnostic_test business.industry Lower extremity CT angiography Body Weight MDCT Age Factors Middle Aged Image Enhancement CECT Popliteal artery Lower Extremity Angiography Lean body mass Linear Models Original Article Female Nuclear medicine business Body mass index |
| Zdroj: | Korean Journal of Radiology |
| ISSN: | 2005-8330 1229-6929 |
| Popis: | Objective To evaluate the effect of patient characteristics on popliteal aortic contrast enhancement at lower extremity CT angiography (LE-CTA) scanning. Materials and Methods Prior informed consent to participate was obtained from all 158 patients. All were examined using a routine protocol; the scanning parameters were tube voltage 100 kVp, tube current 100 mA to 770 mA (noise index 12), 0.5-second rotation, 1.25-mm detector row width, 0.516 beam pitch, and 41.2-mm table movement, and the contrast material was 85.0 mL. Cardiac output (CO) was measured with a portable electrical velocimeter within 5 minutes of starting the CT scan. To evaluate the effects of age, sex, body size, CO, and scan delay on the CT number of popliteal artery, the researchers used multivariate regression analysis. Results A significant positive correlation was seen between the CT number of the popliteal artery and the patient age (r = 0.39, p < 0.01). A significant inverse correlation was observed between the CT number of the popliteal artery and the height (r = -0.48), total body weight (r = -0.52), body mass index (r = -0.33), body surface area (BSA) (r = -0.56), lean body weight (r = -0.56), and CO (r = -0.35) (p < 0.001 for all). There was no significant correlation between the enhancement and the scan delay (r = 0.06, p = 0.47). The BSA, CO, and age had significant effects on the CT number (standardized regression: BSA -0.42, CO -0.22, age 0.15; p < 0.05, respectively). Conclusion The BSA, CO, and age are significantly correlated with the CT number of the popliteal artery on LE-CTA. |
| Databáze: | OpenAIRE |
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