A Non-interventional Study to Observe the Computed Tomographic Angiography Image Quality With Different Contrast Media Injection Protocols Under Different Computed Tomography Machines Parameters Setting

A Study of the Image Quality in Coronary or Craniocervical CT Angiography With Different Iodine Delivery Rates Using Low Tube Voltage (80 or 100 kV) Imaging in MDCT

The objective of this study is to evaluate the image quality for different iodine delivery rates at different low voltage scanning protocols (80 or 100 kV ) under the modern advanced Multi-Detector Computed Tomography (MDCT) considering the body weight of patients.

The purpose of this study is to evaluate the image quality of different acquisition protocols in patients weighing less than 90 kg using low voltage 80 or 100 kV with a lower Iodine Delivery Rate based on the body weight of the patient, who will undertake coronary or craniocervical CTA (Computed Tomography Angiography) in routine procedures.

Inclusion Criteria:

• Patients for whom the decision to initiate CTA will be made as per investigator's routine practice.
• Adult patients (age ≥18 years) with a weight ≤ 90 kg.
• Written Informed Consent.

Exclusion Criteria:

• A history of hypersensitivity to iodinated contrast agents.
• Known or suspected hyperthyroidism or pheochromocytoma.
• Atrial fibrillation or any other cardiac arrhythmia that would preclude reliable ECG gating; have severe congestive heart failure (New York Heart Classification IV).
• Pregnant or lactating women.
• Patients participating in another clinical study.
• Patients who underwent PCI (percutaneous coronary intervention) or CABG (coronary artery bypass grafting) before the index CTA.