NBI improves detection of bladder cancer and CIS over white light at the push of a button.
Narrow Band Imaging (NBI) is a powerful optical image enhancement technology that improves the visibility of blood vessels and other structures on the bladder mucosa. This makes it an excellent tool for diagnosing bladder cancer during cystoscopy.
White light is composed of an equal mixture of wavelengths. The shorter wavelengths only penetrate the top layer of the mucosa, while the longer wavelengths penetrate deep into the mucosa. NBI light is composed of just two specific wavelengths that are strongly absorbed by haemoglobin.
The shorter wavelength in NBI is 415 nm light, which only penetrates the superficial layers of the mucosa. This is absorbed by capillary vessels in the surface of the mucosa and shows up brownish on the video image. This wavelength is particularly useful for detecting tumours, which are often highly vascularised. The second NBI wavelength is 540 nm light, which penetrates deeper than 415 nm light. It is absorbed by blood vessels located deeper within the mucosal layer, and appears cyan on the NBI image. This wavelength allows a better understanding of the vasculature of suspect lesions.
Absorbtion of narrowband illumination
Now also available as HD with the CYF-VH NBI and white-light imaging can be alternated at the push of a button, giving a much broader view of the bladder mucosa. NBI is used to fully inspect the bladder for suspicious lesions, and helps to delineate the border of tumours to a much greater extent than white light. This is particularly useful in the detection of carcinoma in situ, which may be completely flat. On switching to NBI, there is a reduction in the overall illumination of the bladder. With the new HD CYF-VH NBI is 20% light compared to existing Olympus flexible VideoCystoscopes and greater improves the overall analysis of the bladder.
High-Definition TV (HDTV)The cristal-clear view in the urethra improves detection and diagnosis of suspicious areas.
High-Definition TV (HDTV)Already under white light, the CYF-VH allows a wider view and detailed vision, which is primarily important for all bladder cancer follow-up cystoscopies.
Improved deflectionThe CYF-VH bends 10° more in each direction with its 220° upward and 130° downward deflection, providing the ability to see and treat all areas of the bladder with ease.
Olympus has developed the CV-190 VISERA ELITE processor to allow NBI to be performed at the push of a button in HD quality. Furthermore, Olympus' new generation of 'chip on the tip' flexible cystoscopes allow these images to be collected in HD, for excellent image quality and a safe diagnosis. NBI works to complement to other Olympus systems, including photodynamic detection (PDD) and bipolar resection using trans-urethral resection in saline (TURis) and overall improving the cycle of bladder cancer treatment for patient and doctor.
Compared with standard white-light cystoscopy, NBI improved the detection of recurrent, non-muscle-invasive bladder tumours.
The flexible HD cystoscope offers the established evolution tip further developed for a better view, a potentially shorter procedure and improved patient comfort.
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