Comparisons of choroidal nevus measurements obtained using 10- and 20-MHz ultrasound and spectral domain optical coherence tomography
| Autor: | Rubens N. Belfort, Patricia Novita Garcia, Maíra de França Martins, Norma Allemann, Liliane Almeida Andrade Kanecadan, Kelcia Kiefer |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male genetic structures Neoplasias da coroide/ultrassonografia Tomography optical coherence Ultrassonografia Posterior pole Choroidal neoplasms/ultrasonography Spectral domain 03 medical and health sciences 0302 clinical medicine Optics lcsh:Ophthalmology Optical coherence tomography medicine Humans Image acquisition Nevus Prospective Studies Aged Ultrasonography Aged 80 and over Nevus Pigmented Nevo pigmentado/patologia medicine.diagnostic_test business.industry Choroid Neoplasms Ultrasound Organ Size General Medicine Nevus pigmented/pathology Middle Aged medicine.disease eye diseases Choroidal nevus Ophthalmology Tomografia de coerência óptica lcsh:RE1-994 Dimensional Measurement Accuracy 030220 oncology & carcinogenesis 030221 ophthalmology & optometry Female sense organs Tomography business Nuclear medicine Tomography Optical Coherence |
| Zdroj: | Arquivos Brasileiros de Oftalmologia, Vol 80, Iss 2, Pp 78-83 Arquivos Brasileiros de Oftalmologia v.80 n.2 2017 Arquivos brasileiros de oftalmologia Conselho Brasileiro de Oftalmologia (CBO) instacron:CBO Arquivos Brasileiros de Oftalmologia, Volume: 80, Issue: 2, Pages: 78-83, Published: APR 2017 |
| ISSN: | 0004-2749 |
| DOI: | 10.5935/0004-2749.20170020 |
| Popis: | Purpose: To compare measurements of lesions clinically diagnosed as choroidal nevi using spectral domain optical coherence tomography (SD-OCT) and 10- and 20-MHz ultrasound (US). Methods: This prospective study, which was conducted between May 2011 and December 2011, evaluated eyes diagnosed with choroidal nevus via photographic documentation using 10- or 20-MHz A- and B-mode US (experienced examiner using both the transpalpebral technique and direct contact) or SD-OCT in the enhanced depth imaging mode (performed by a different examiner blinded to the US results). Anteroposterior (AP) and transverse (T) US sections corresponded to sections adjusted perpendicularly on SD-OCT. Results: We evaluated 14 eyes from 12 patients (six males, mean patient age= 64.5 years) diagnosed with choroidal nevus. The choroidal nevi of all samples had a melanocytic profile. Moreover, eight nevi were located at the equator, five nevi were located in the posterior pole (peripapillary in one sample), and one nevus shifted from the equator to the periphery. On SD-OCT, the maximum measurable dimension was 9 mm. The lesions in the posterior pole were easier to evaluate, and image acquisition of lesions located more peripherally was possible depending on patient cooperation. The accurate assessment of height was difficult. Baseline dimensions on 10- and 20-MHz US were larger than those determined via OCT. No significant differences in height were observed between US and SD-OCT. All parameters were statistically similar between 10- and 20-MHz US measurements. Conclusions: No significant difference in the AP and T diameters was observed between 10- and 20-MHz US measurements; however, these measurements (AP and T) were significantly higher than those obtained using OCT. No significant differences in height were observed among the techniques adopted. RESUMO Objetivo: Comparar as medidas obtidas de lesões diagnosticadas clinicamente como nevus de coroide através da tomografia de coerência óptica de domínio espectral (Spectralis, Heidelberg Engineering, Inc.), ultrassonografia com 10 MHz e de 20 MHz. Métodos: Estudo prospectivo realizado entre maio e dezembro de 2011, avaliou olhos com diagnóstico de nevus de coroide, utilizando documentação fotográfica, ultrassonografia com transdutor 10-MHz e 20-MHz A- e B-mode e SD-OCT em modo de EDI, por um examinador diferente para cada técnica. Os cortes realizados perpendiculares entre si, correspondentes ao corte ântero-posterior e latero-lateral à ultrassonografia. Resultados: Foram avaliados 14 olhos de 12 pacientes (6 do sexo masculino), com média de idade média de 64,5 anos. Todos os nevus tinham um perfil melanocítico. Observou-se 8 nevus no equador, 5 no polo posterior (peripapilar em uma amostra), e 1 deslocado a partir do equador para a periferia. Em SD-OCT, a dimensão máxima mensurável foi de 9 mm. As lesões no polo posterior eram mais fáceis de avaliar e aquisição de imagens de lesões mais periféricas era possível, dependendo da colaboração do paciente. A avaliação precisa da altura era difícil. As dimensões usando transdutor 10-MHz e 20-MHz US foram maiores que as encontradas pelo SD-OCT. Não foram observadas diferenças significativas na altura entre métodos SD-OCT e US. Todas as medidas foram estatisticamente semelhantes entre 20-MHz e 10-MHz. Conclusão: Para o parâmetro AP e T não foi detectada diferença entre as medidas utilizando US de 10-MHz e de 20-MHz. Porém estas medidas se mostraram significativamente maiores em relação à medida obtida com OCT. Para a altura, não foram detectadas diferenças estatística em relação à técnica utilizada, US 10-MHz e 20-MHz e SD-OCT. |
| Databáze: | OpenAIRE |
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