Evaluation of the SpiesTMmodalities image quality.
BACKGROUND
The Spies™ system (Karl-Storz®) was introduced into digital ureteroscopy to improve endoscopic vision. To date, there is no data to either indicate which of the Spies modalities is better for improving diagnosis and treatment procedures, nor to compare the modalities in terms of image quality. The aim of this study was to evaluate and compare the image quality of five Spies™ modalities (SM) to the standard white light in an in-vitro model.


METHODS
Two standardized grids and 3 stones of different composition were recorded in white light and the 5SM (Clara, Chroma, Clara+Chroma), Spectra A and B) using 4 standardized aqueous scenarios. Twelve templates were done in order to simultaneously compare the same objective in the different modalities. Six urologists, five medical students, five urology residents, and five persons not involved with urology evaluated each video on a scale of 1 (very bad) to 5 (very good).


RESULTS
Comparing white light to SM, subjects scored better the quality of Clara and Clara+Chroma than white light (p=0.0139 and p<0.05) and scored worse Spectra A and B (p=0.0005 and p=0.0023). When comparing Clara to the other SM, it was ranked equivalent to Clara+Chroma (p=0.67) and obtained a higher rank than Chroma, Spectra A and B (p<0.05, p=0.0001 and p=0.0001). In the multivariate analysis mean scores were higher among urologists.


CONCLUSIONS
In all analyzed scenarios, the subjects ranked Clara and Clara+Chroma as the modalities with better image quality compared to white light.
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Esteban
E
Emiliani
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Michele
M
Talso
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Mohammed
M
Baghdadi
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Aaron
A
Barreiro
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Andrea
A
Orosa
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Pol
P
Serviàn
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Pavel
P
Gavrilov
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.
Silvia
S
Proietti
Department of Urology, Hôpital Tenon, Université Pierre et Marie Curie - Paris VI, Paris, France.|GRC lithiase -Grouped Recherche Clinique- Université Paris VI, Pierre et Marie Curie, Paris, France.
Olivier
O
Traxer
D000328:Adult; D005260:Female; D006801:Humans; D017602:Lithotripsy, Laser; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000000981:diagnostic imaging*; D020709:Ureteroscopes; D018666:Ureteroscopy / Q000295:instrumentation* / Q000379:methods; D014570:Urologic Diseases / Q000000981:diagnostic imaging*; D055815:Young Adult
 Lithotripsy; Diagnosis; Ureteroscopy 