A practical biphasic contrast media injection protocol strongly enhances the aorta and pulmonary artery simultaneously using a single CT angiography scan
| Autor: | Ju-Yen Yeh, Chun-Chao Huang, Cheng-Chih Hsieh, Ya-Ling Yang, Zong-Yi Jhou, Feng-Chuan Hsieh, An-Bang Zeng, Jing-Kai Lin, Chih-Hsin Wang, Chia-Hung Chen |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
Iohexol Aortic dissection Radiation Dosage medicine.artery medicine Medical technology Humans Radiology Nuclear Medicine and imaging In patient Test bolus R855-855.5 Computed tomography angiography Aged Retrospective Studies Aorta medicine.diagnostic_test business.industry Contrast media Pulmonary embolism Middle Aged medicine.disease Aortic Aneurysm Technical Advance Angiography Pulmonary artery Female Nuclear medicine business |
| Zdroj: | BMC Medical Imaging, Vol 21, Iss 1, Pp 1-8 (2021) BMC Medical Imaging |
| ISSN: | 1471-2342 |
| Popis: | Background Enhancement profiles of the pulmonary artery (PA) and aorta differ when using computed tomography (CT) angiography. Our aim was to determine the optimal CT protocol for a one-time CT scan that assesses both blood vessels. Methods We prospectively enrolled 101 cases of CT angiography in patients with suspected pulmonary embolism or aortic dissection from our center between 2018 and 2020. We also retrospectively collected the data of 40 patients who underwent traditional two-time CT scans between 2015 and 2018. Patients were divided into four groups: test bolus (TB) I, TB II, bolus-tracking (BT) I, and BT II. The enhancement of the PA and aorta, and the radiation doses used in the four groups were collected. Those who underwent two-time scans were classified into the traditional PA or aorta scan groups. Data were compared between the BT and traditional groups. Results The aortic enhancement was highest in BT II (294.78 ± 64.48 HU) followed BT I (285.18 ± 64.99 HU), TB II (186.58 ± 57.53 HU), and TB I (173.62 ± 69.70 HU). The radiation dose used was lowest in BT I (11.85 ± 5.55 mSv) and BT II (9.07 ± 3.44 mSv) compared with that used in the traditional groups (20.07 ± 7.78 mSv) and accounted for half of the traditional group (45.17–59.02%). The aortic enhancement was also highest in BT II (294.78 ± 64.48 HU) followed by BT I (285.18 ± 64.99 HU) when compared with that in the traditional aorta scan group (234.95 ± 94.18 HU). Conclusion Our CT protocol with a BT technique allows for a lower radiation dose and better image quality of the PA and aorta than those obtained using traditional CT scans. Trial registration: NCT04832633, retrospectively registered in April 2021 to the clinical trial registry. |
| Databáze: | OpenAIRE |
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