Abstract
PurposeFlexible endoscopic evaluation of swallowing (FEES®) is a standard diagnostic tool in dysphagia. The combination of FEES® and narrow band light (narrow band imaging; NBI) provides a more precise and detailed investigation method. So far, this technique could only be performed with the NBI illumination. The new version of the “professional image enhancement technique” (PIET) provides another image enhancing system. This study investigates the eligibility of PIET in the FEES® procedure.MethodsBoth techniques, NBI and PIET, were compared using a target system. Furthermore, the image enhancement during FEES® was performed and recorded with the two systems during daily routine.ResultsPerforming an image enhancement during FEES® is possible with both systems PIET and NBI. On the target system, the contrast of the PIET showed a brighter and a more detailed picture. In dysphagia patients, no difference between PIET and NBI was detected.ConclusionsPIET proved to be non-inferior to NBI during image enhancement FEES®. So far, image enhancement FEES® was exclusively connected to NBI. With the PIET system, an alternative endoscopy technology is available for certain indications.
Highlights
Narrow band imaging (NBI; Olympus Medical Systems Corp., Tokyo, Japan) is an optical technology which was first described in 1999 [1] and has been applied in different medical areas since
With the professional image enhancement technique” (PIET) system using the measurement with the RGB color system higher values were obtained in the five defined areas (Table 1)
This study provides evidence for the feasibility of this procedure to be done with the PIET technique and compares the findings to those done with the NBI technique
Summary
Narrow band imaging (NBI; Olympus Medical Systems Corp., Tokyo, Japan) is an optical technology which was first described in 1999 [1] and has been applied in different medical areas since . An optical filter allows penetration of narrow band light with the wavelength of 415 nm (blue light) and 540 nm (green light). Depending on the soft tissue, the NBI light is absorbed in different manners. This leads to a higher contrast of vessels and surrounding mucosa. This technique is used to analyze and evaluate pathological epithelial changes [2,3,4]. Employing the NBI technique in a flexible endoscopic evaluation of swallowing
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