Contrast-Enhanced Head CTA Protocol

This part of the method has been described in detail in previous studies (14 (link)). Briefly, participants underwent head CTA. All participants were injected with 60 mL of contrast agent (iodide 370 mg/mL, Bayer, Germany), followed by 40 mL of normal saline collection agent at an injection rate of 4 mL/s. The scan was performed with a 64-section cardiac CT scanner (CT750 HD, GE, USA) using a standardized optimized contrast-enhanced protocol (120 kV [peak]; 180 mAs; collimation, 64 × 0.625 mm; rotation time, 0.5 s; pitch, 1.375). The head CT scan range was from the carotid bifurcation to the parietal region. An aneurysm was defined as an abnormal swelling or bulge of an intracranial artery (16 (link)). Aneurysms were jointly diagnosed by a senior radiologist and senior neurosurgeon. None of the patients included in this study had a high suspicion intracranial aneurysm.

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Liu J., Zou X., Zhao Y., Jin Z., Tu J., Ning X., Li J., Yang X, & Wang J. (2022). Prevalence and Risk Factors for Unruptured Intracranial Aneurysms in the Population at High Risk for Aneurysm in the Rural Areas of Tianjin. Frontiers in Neurology, 13, 853054.

Publication 2022

CT750 HD

Aneurysms Artery Cardiac Carotid Ct scan Ct scanner Head Intracranial aneurysm Iodide Neurosurgeon Normal saline Parietal region Patients Radiologist Scan

Corresponding Organization :

Other organizations : Tianjin People's Hospital, Tianjin Medical University General Hospital, Tianjin Hospital

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Variable analysis

independent variables

Contrast agent (iodide 370 mg/mL, Bayer, Germany)
Injection rate of contrast agent and saline collection agent (4 mL/s)

dependent variables

Presence of intracranial aneurysm

control variables

Head CT scan range (from the carotid bifurcation to the parietal region)
CT scanner (64-section cardiac CT scanner, CT750 HD, GE, USA)
Scan parameters (120 kV [peak]; 180 mAs; collimation, 64 × 0.625 mm; rotation time, 0.5 s; pitch, 1.375)

controls

None of the patients included in this study had a high suspicion intracranial aneurysm

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