T he imaging fi b re bundle is a key component of a fl e xible fi b re bronchoscope and determines the image quality. The clearer and more well defi n ed the image quality, the more support it delivers to the diagnosis of the lesion and suggests options for further treatment planning. The challenge is that each single fi b re has exactly the same dimension and is positioned at the identical position at both ends of the fi bre bundle. If this is not achieved, the image quality is impaired and artefacts disturb the image