Low dose Cardiac CT exam in a patient with high BMI, high heart rate, highly calcified coronary arteries and paroxysmal atrial fibrillation
Heart rate 85-136 BPM
Patient in his 70's with paroxysmal atrial fibrillation was referred to CT for assessment of chronic coronary artery disease before pulmonary vein ablation.
One-beat cardiac acquisition:
160 mm axial scanning with ECG and Auto Gating
100 kV and 542 mA
BMI: 34 (101 kg, 172 cm)
ASiR™-V1 to lower dose
0.28 sec rotation speed
Heart rate: 85 - 136 BPM
70 cc of contrast media (400 mg I/ml, flow 4 cc/s) including SmartPrep phase triggering
DLP 92 mGy-cm
This cardiac CT scan did not show any signs of disease in the pulmonary veins, the left atrium and the included parts of the lungs. The physician also reported a strong coronary atherosclerosis.
1 In clinical practice, the use of ASiR-V may reduce CT patient dose depending on the clinical task, patient size, anatomical location and clinical practice. A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task.