Assessment of Deep Venous Thrombosis by Grayscale Median Analysis of Ultrasound Images

Cassou-Birckholz, Maria Fernanda; Engelhorn, Carlos Alberto; Salles-Cunha, Sérgio X.; Engelhorn, Ana Luiza; Zanoni, Cassiana Casagrande; Gosalan, Carlos José; Ribas, Emerson; Chociai, Ana Carolina Alves dos Santos; Camargo, Camila Faversani

doi:10.1097/ruq.0b013e31820e157d

Cited by 12 publications

(18 citation statements)

References 14 publications

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“…Intervals employed in this application were described in the literature. [6][7][8][9][10][11][12][13] Even without specific intervals for the venous ulcer evaluated, this study detected significant brightness changes after treatment. In particular, the GSM of the open ulcer acquired had, post healing, brightness similar to the adjacent skin.…”

Section: Discussionmentioning

confidence: 91%

Tissue characterization by photographic imaging during treatment of chronic venous ulcer: technical note

et al. 2015

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Chronic venous ulcers are a medical challenge with a socioeconomic impact. Tissue characterization was quantified by photographic imaging (p-CATIM) of a leg wound treated with Unna boot for 45 days. Three photographs, taken pre-treatment, post Unna boot and post healing were analyzed. Brightness on a 0-255 gray image was re-scaled with black as 0 and adjacent skin as 200. Gray Scale Median (GSM) and the percentages of pixels in each of 14 brightness intervals were calculated. Open ulcer GSM increased from 110 to 159 post Unna boot treatment, reaching 203 post healing. Predominant brightness intervals for the ulcer were 41-153 pre-treatment, 83% of pixels; 133-196 post Unna boot, 80%; and 175-255 post healing, 97%. The GSM of the subcutaneous wound around the ulcer increased from 117 to 137 post healing; the proportion of pixels in the 91-174 interval increased from 67% to 88% (p<0.001). CATIM quantified photographic changes during venous ulcer healing with comparison to the adjacent skin.Keywords: venous insufficiency; ulcer; photography; quantitative analysis; healing. ResumoÚlcera de estase na insuficiência venosa crônica constitui desafio médico com impacto socioeconômico. Quantificamos caracterização tecidual por imagem fotográfica (f-CATIM) em ferida de perna tratada com bota de Unna por 45 dias. Três fotografias obtidas pré-tratamento, pós-tratamento com bota e pós-cicatrização foram analisadas. Brilhos em imagem cinza foram recalculados para nova escala no zero preta e 200 para brilho de pele adjacente à ferida. Mediana da escala cinza ou Gray Scale Median (GSM) e proporções de pixels em 14 intervalos de brilho foram estimadas. GSM da úlcera aumentou de 110 para 159 pós-tratamento com bota, atingindo 203 pós-cicatrização. Intervalos predominantes na úlcera: 41-153 pré-tratamento, 83% dos pixels; 133-196 pós-bota, 80%; 175-255 pós-cicatrização, 97%. GSM da ferida subcutânea ao redor da úlcera aumentou de 117 a 137 pós-cicatrização, de 67% a 88% dos pixels no intervalo 91-174 (p<0,001). CATIM quantificou evolução fotográfica de cicatrização de úlcera venosa comparada com pele adjacente.Palavras-chave: insuficiência venosa; úlcera; fotografia; análise quantitative; cicatrização.

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Section: Discussionmentioning

confidence: 91%

Tissue characterization by photographic imaging during treatment of chronic venous ulcer: technical note

et al. 2015

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“…Therefore, there is room for improvement and development of a more userfriendly interface and better discrimination of plaque components. In the medical area, several authors have been working towards the improvement of this technique for the analysis of atheromas, venous thrombi, edema, renal parenchyma and thrombi in the aneurysmal sac to follow up patients after intraluminal corrections of aortic aneurysms [31][32][33] .…”

Section: Resultsmentioning

confidence: 99%

Comparacoes preliminares entre a histologia virtual ultrassonografica in vivo e os achados histopatologicos da placa carotidea produto de endarterectomia

Menezes

Silveira

et al. 2013

J. vasc. bras.

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Background: Extracranial carotid artery atherosclerosis is a major preventable cause of strokes, the second most common cause of death in developed countries. The degree of arterial lumen stenosis is the basis for surgical indications, but does not provide information about other plaque aspects. Studies in the literature suggest that the morphological characteristics of the plaque and its composition should also be included in the assessment of this disease. Objective: Investigate the correlation between atherosclerotic plaque composition defined by computer-assisted analysis of ultrasound images (virtual histology -USVH) and conventional histology. Method: The images of twelve plaques, obtained during preoperative ultrasound scanning, were analyzed by computer, and the grey scale images were correlated with the plaque components and subsequently compared with the histological findings of the analysis of the endarterectomy specimens. Results: The amount of lipids and fibromuscular tissue were strongly correlated in the two tests (R=0.83 and 0.91). There were no significant correlations with amount of blood or calcium (R=0.05 and 0.19). Conclusion: This study confirmed the usefulness of noninvasive USVH. Further technical improvements and software developments may promote the clinical application of this method.

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“…This study extended the application of the ultrasonographic USTC-CATUS technique to images in general, photographic images in this case. Analyses of aneurysms 4 , normal and transplanted kidneys 5,6 , atheromas [7][8][9][10] , venous thrombosis [11][12][13] and edema 14 have thereby been extended to a potential application of photographic images to ulcerated wounds or peripheral injuries.…”

Section: Discussionmentioning

confidence: 99%

“…GSM was also related to ease of reentry during treatment of occlusive femoral atherosclerosis by subintimal angioplasty 8 . A study assessing lower extremity deep vein thrombosis showed distinctive ultrasonographic echoes and specific GSM values with either high positive predictive value, or high sensitivity to differentiate acute from subacute thrombi 12 . We describe in this paper the application of p-IMTC to five photographs taken during treatment of an ulcerated diabetic foot post hallux amputation.…”

Section: Introductionmentioning

confidence: 99%

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Photographic image tissue characterization of the ulcerated diabetic foot during treatment: technical note

et al. 2013

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Treatment of an ulcerated diabetic foot was documented photographically. We adapted the ultrasonographic tissue characterization (USTC or CATUS) technique to develop a photographic image tissue characterization (p-IMTC or CATIM) method. Five photographs, taken during medical treatment of an ulcerated diabetic foot following digital amputation, were quantified using imaging software designed to determine brightness intensity in grey scale images. The grey scale median (GSM) changed from 127 to 98; 86; 76; and 83 (out of 255) during follow-up. The area of lesion was estimated by number of pixels and reduced from 17.85 cm² to 12.44; 3.68; 2.11; and 0.15 cm². The percentage of total number of pixels showing granulation tissue increased from 11% to 34%; 56%; 62%; and 75%. p-IMTC quantified treatment progress. GSM quantified generalized changes in tissues, while the area of lesion and granulation tissue were documented quantitatively. Lesions, ulcers, wounds or other tissues can be analyzed using p-IMTC, allowing quantification, characterization and control of the progression of a condition or treatment.Keywords: diabetic foot; ulcer; photography; quantitative analysis. ResumoTratamento do pé diabético ulcerado é documentado fotograficamente. Adaptamos a técnica da caracterização tecidual ultrassonográfica (CATUS ou USTC) para análise da imagem fotográfica (CATIM ou p-IMTC). Cinco fotografias obtidas durante tratamento médico de pé diabético ulcerado, pós-amputação digital, foram quantificadas por software de imagem desenvolvido para caracterizar amplitudes de brilho em tons cinza. A mediana da escala cinzenta, ou Grey Scale Median (GSM), alterou de 127 para 98; 86; 76; e 83 durante o seguimento. Área da lesão, estimada por número de pixels, diminuiu de 17,85 para 12,44; 3,68; 2,11; e 0,15 cm². A porcentagem de número de pixels com granulação aumentou de 11% para 34%; 56%; 62%; e 75%. CATIM quantificou progresso do tratamento. GSM quantificou modificações generalizadas do tecido, a área da lesão foi estimada e a granulação foi documentada quantitativamente. Análises CATIM de lesões, úlceras, feridas, ou outros tecidos podem ser feitas, permitindo quantificação, caracterização e controle da evolução do agravo ou tratamento.Palavras-chave: pé diabético; úlcera; fotografia; análise quantitativa.

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Assessment of Deep Venous Thrombosis by Grayscale Median Analysis of Ultrasound Images

Abstract: Grayscale median of US images documenting femoropopliteal DVT correlated with (a) the time between symptoms onset and US examination and (b) the sonographers' interpretation of acute versus subacute thrombosis.

Cited by 12 publications

References 14 publications

Tissue characterization by photographic imaging during treatment of chronic venous ulcer: technical note

Tissue characterization by photographic imaging during treatment of chronic venous ulcer: technical note

Comparacoes preliminares entre a histologia virtual ultrassonografica in vivo e os achados histopatologicos da placa carotidea produto de endarterectomia

Photographic image tissue characterization of the ulcerated diabetic foot during treatment: technical note

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