Change of device used for dual energy computed tomography with Xenon

Demonstrate the feasibility of dual energy computed tomography using Krypton as a gaseous contrast media in order to study the in vivo ventilation.

Two different clinical situations will be tested :

• Prediction of postoperative pulmonary function for oncologic patients
• Detection of Bronchiolitis Obliterans in lung transplant recipients.

Inclusion criteria:

For oncologic patients :

• Potentially operable lung tumor
• With a recent (less than 1 month) V/Q scan

For lung transplant recipients :

• Single of bilateral lung transplant
• From 5 months onwards
• With recent (less than 1 month) respiratory functional explorations

Exclusion criteria:

• Impossibility to follow simple orders or control one's respiration
• Known Krypton hypersensitivity
• History of malignant hyperthermia
• Increased intracranial pressure
• Minors
• Pregnant Women