Visibility and image quality of peripheral pulmonary arteries in pulmonary embolism patients using free-breathing combined with a high-threshold bolus-triggering technique in CT pulmonary angiography
| Autor: | Lin Li, Yong Ma, Yucun Fu, Xiansheng Cai, Xiaoshuang Che, Daliang Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
free-breathing
Medicine (General) Image quality Computed Tomography Angiography Contrast Media Computed tomography 030204 cardiovascular system & hematology Pulmonary Artery Biochemistry 030218 nuclear medicine & medical imaging pulmonary angiography 03 medical and health sciences 0302 clinical medicine R5-920 medicine Pulmonary angiography threshold image quality Humans medicine.diagnostic_test business.industry Biochemistry (medical) Visibility (geometry) Pulmonary embolism digestive oral and skin physiology Angiography Clinical Research Report computed tomography Cell Biology General Medicine medicine.disease Peripheral x-ray Bolus (digestion) Nuclear medicine business Tomography X-Ray Computed Free breathing |
| Zdroj: | Journal of International Medical Research, Vol 48 (2020) The Journal of International Medical Research |
| ISSN: | 1473-2300 |
| Popis: | Objective To investigate the visibility of peripheral pulmonary arteries by computed tomography pulmonary angiography (CTPA) and image quality using a free-breathing combined with a high-threshold bolus triggering technique and to explore the feasibility of this technique in pulmonary embolism (PE) patients who cannot hold their breath. Methods Patients with suspected PE who underwent CTPA (n=240) were randomly assigned to two groups: free-breathing (n=120) or breath-holding (n=120). Results The mean scanning time or visible pulmonary artery distal branches were not different between the groups. Mean CT main pulmonary artery (MPA) values, apical segment (S1), and posterior basal segment (S10) in the free-breathing group were higher compared with the breath-holding group. The subjective image quality score in the free-breathing group was higher compared with the breath-holding group. In the free-breathing group, no respiratory artifact was observed. In the breath-holding group, obvious respiratory artifacts were caused by severe chronic obstructive pulmonary disease (COPD), dyspnea, or other diseases that preclude patients from holding their breath. Conclusion The free-breathing mode CTPA combined with a high-threshold bolus triggering technique can provide high quality images with a lower incidence of respiratory and cardiac motion artifacts, which is especially valuable for patients who cannot hold their breath. |
| Databáze: | OpenAIRE |
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