[1] Isala, Dept Nucl Med, Dokter van Heesweg 2, NL-8025 AB Zwolle, Netherlands
[2] Univ Twente, MIRA Inst Biomed Technol & Tech Med, POB 217, NL-7500 AE Enschede, Netherlands
[3] Isala, Dept Med Phys, Zwolle, Netherlands
[4] Isala, Dept Pulmonol, Zwolle, Netherlands