[Assessment of the Quantel Medical 20-Mhz Ultrasound Cinescan in intraocular measurements].
OBJECTIVE
Evaluation of the Quantel Medical 20-MHz Ultrasound Cinescan using a closed transducer in intraocular measurements and its reproducibility.


METHODS
We measured sulcus-to-sulcus distance of 40 control eyes using the20-MHz Cinescan. Then we compared the sonography to the Oculus Pentacam based on the Scheimpflug principle in the measurements of anterior chamber depth, cornea-to-implant distance, and implant-to-crystallin lens distance in patients who underwent phakic implantation (56 eyes).


RESULTS
With this technique, the sulcus-to-sulcus distance can be measured with a reproducibility of 86%-88% (p<0.05). The authors show that the corneal diameter is not correlated with the sulcus measurement (R=24%, p<0.05).


CONCLUSIONS
Several techniques are used to quantify anterior segment biometry. Some of these methods, such as White-to-White, are too empirical and others, such as the Scheimpflug camera - for example the EAS-1000 (Nidek) - or high-frequency ultrasound - Ultrasound BioMicroscopy UBM P45 (Paradigm) - are too expensive. The 20-MHz Cinescan has good reproducibility and provides easier access to anterior segment biometry.


CONCLUSIONS
The 20-MHz Cinescan appears to be an accessible technique that may become a useful tool in the refractive surgery of the phakic intraocular lens.
Lebaillif
S
S
Service d'Ophtalmologie, CHU, Brest.
Roussel
B
B
Cochener
B
B
D000328:Adult; D005123:Eye / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D015203:Reproducibility of Results; D014463:Ultrasonography