This study assesses the reproducibility of 3 different formulas in calculating the volume of a transplanted kidney by ultrasound in-vivo measurements.

3 series of measurements will be performed by 2 different operators during the usual ultrasound follow-up of the renal transplant.

The 3 series of measurements

1. Longitudinal section: maximum longitudinal length, width at the hilum, maximum width, width at the upper third, longitudinal cross-sectional area
2. Transverse section at the hilum : thickness, width, hilar cross-sectional area
3. Largest transverse section : thickness, width, maximum transverse cross-sectional area

Clinical and biological patient data collection:

age, gender, date of transplantation, serum creatinine and glomerular filtration rate (GFR), kidney transplant placement (right or left iliac fossa), acute illness or usual follow-up

Inclusion Criteria:

• Kidney transplant recepients with ultrasound follow-up at the University Hospital of Tours
• Age more than 18 years old

Exclusion Criteria:

• Renal deformity of extrinsic origin
• Early post-transplant period (first 3 days post-transplant)
• Transplanted organ out of the field of view
• Dual kidney transplant
• Opposition to the data collection

Kidney transplant recipients