TY - JOUR
T1 - Enhancing colposcopy with polarized light
AU - Ferris, Daron Gale
AU - Li, Wenjing
AU - Gustafsson, Ulf
AU - Lieberman, Richard W.
AU - Galdos, Oscar
AU - Santos, Carlos
PY - 2010/1/1
Y1 - 2010/1/1
N2 - Objective.: To determine the potential utility of polarized light used during colposcopic examinations. Materials and Methods.: Matched, polarized, and unpolarized colposcopic images and diagnostic annotations from 31 subjects receiving excisional treatment of cervical neoplasia were compared. Sensitivity, specificity, and mean Euclidean distances between the centroids of the gaussian ellipsoids for the different epithelial types were calculated for unpolarized and polarized images. Results.: The sensitivities of polarized colposcopic annotations for discriminating cervical intraepithelial neoplasia (CIN) 2 or higher were greater for all 3 acetowhite categories when compared with unpolarized annotations (58% [44/76] vs 45% [34/76], 68% [50/74] vs 59% [45/76], and 68% [49/72] vs 66% [50/76], respectively). The average percent differences in Euclidean distances between the epithelial types for unpolarized and polarized cervical images were as follows: CIN 2/3 versus CIN 1 = 33% (10/30, p =.03), CIN 2/3 versus columnar epithelium = 22% (p =.004), CIN 2/3 versus immature metaplasia = 29% (14/47, p =.11), and CIN 1 versus immature metaplasia = 27% (4.4/16, p =.16). Conclusions.: Because of its ability to interrogate at a deeper plane and eliminate obscuring glare, polarized light colposcopy may enhance the evaluation and detection of cervical neoplasias.
AB - Objective.: To determine the potential utility of polarized light used during colposcopic examinations. Materials and Methods.: Matched, polarized, and unpolarized colposcopic images and diagnostic annotations from 31 subjects receiving excisional treatment of cervical neoplasia were compared. Sensitivity, specificity, and mean Euclidean distances between the centroids of the gaussian ellipsoids for the different epithelial types were calculated for unpolarized and polarized images. Results.: The sensitivities of polarized colposcopic annotations for discriminating cervical intraepithelial neoplasia (CIN) 2 or higher were greater for all 3 acetowhite categories when compared with unpolarized annotations (58% [44/76] vs 45% [34/76], 68% [50/74] vs 59% [45/76], and 68% [49/72] vs 66% [50/76], respectively). The average percent differences in Euclidean distances between the epithelial types for unpolarized and polarized cervical images were as follows: CIN 2/3 versus CIN 1 = 33% (10/30, p =.03), CIN 2/3 versus columnar epithelium = 22% (p =.004), CIN 2/3 versus immature metaplasia = 29% (14/47, p =.11), and CIN 1 versus immature metaplasia = 27% (4.4/16, p =.16). Conclusions.: Because of its ability to interrogate at a deeper plane and eliminate obscuring glare, polarized light colposcopy may enhance the evaluation and detection of cervical neoplasias.
KW - cervical neoplasia
KW - colposcopy
KW - cross-polarization
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U2 - 10.1097/LGT.0b013e3181d52f59
DO - 10.1097/LGT.0b013e3181d52f59
M3 - Article
C2 - 20592547
AN - SCOPUS:77954933108
SN - 1089-2591
VL - 14
SP - 149
EP - 154
JO - Journal of Lower Genital Tract Disease
JF - Journal of Lower Genital Tract Disease
IS - 3
ER -