Cross-sectional imaging

CT/CTA

Paediatric cardiovascular CT reference calculations from selected Donthula et al. 2024 ECG-gated CTA models.

ZED Quick Tools · CT

CT aortic Z-scores

Free

Choose the ECG-gated phase, aortic structure and measurement. Haycock BSA is used automatically.

Reference selection

Ascending Aorta — Maximum diameter

PhaseStructureMeasurement

Measured en face using double-oblique multiplanar reconstruction at the level of the right pulmonary artery / pulmonary artery bifurcation.

Systolic reference: aortic valve open, approximately 30–40% RR interval in the source study.

Patient and measurement

Enter patient data

HeightcmStanding height or recumbent lengthWeightkgUsed to calculate Haycock BSA

AgeMaximum diameter (mm)mm

Enter the required patient parameters and measurement to calculate this selected CT reference.

About this reference

Measurement: Measured en face using double-oblique multiplanar reconstruction at the level of the right pulmonary artery / pulmonary artery bifurcation.

Phase: Systolic reference: aortic valve open, approximately 30–40% RR interval in the source study.

Method: Indexed value = measured value / Haycock BSA^AE; Z = (indexed value − indexed mean) / indexed SD.

Selected coefficients: AE 0.49; indexed mean 18.236; indexed SD 2.079; study n = 88.

Reference: Donthula R, Li W, Duvvada A, Dyar D, Uppu SC. Normative computed tomography angiography values of the aortic root, aorta, and aortic arch in children. European Journal of Pediatrics. 2024;183(12):5425–5439. DOI: 10.1007/s00431-024-05818-7

Reference derived from ECG-gated CTA in children; study BSA range approximately 0.16–2.8 m².