J. Med. Internet Res. - Google Glass for documentation of medical findings: evaluation in forensic medicine.


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CKGROUND: Google Glass is a promising premarket device that includes an optical head-mounted display. Several proof of concept reports exist, but there is little scientific evidence regarding its use in a medical setting.OBJECTIVE: The objective of this study was to empirically determine the feasibility of deploying Glass in a forensics setting.METHODS: Glass was used in combination with a self-developed app that allowed for hands-free operation during autopsy and postmortem examinations of 4 decedents performed by 2 physicians. A digital single-lens reflex (DSLR) camera was used for image comparison. In addition, 6 forensic examiners (3 male, 3 female; age range 23-48 years, age mean 32.8 years, SD 9.6; mean work experience 6.2 years, SD 8.5) were asked to evaluate 159 images for image quality on a 5-point Likert scale, specifically color discrimination, brightness, sharpness, and their satisfaction with the acquired region of interest. Statistical evaluations were performed to determine how Glass compares with conventionally acquired digital images.RESULTS: All images received good (median 4) and very good ratings (median 5) for all 4 categories. Autopsy images taken by Glass (n=32) received significantly lower ratings than those acquired by DSLR camera (n=17) (region of interest: z=-5.154, P<.001; sharpness: z=-7.898, P<.001; color: z=-4.407, P<.001, brightness: z=-3.187, P=.001). For 110 images of postmortem examinations (Glass: n=54, DSLR camera: n=56), ratings for region of interest (z=-8.390, P<.001) and brightness (z=-540, P=.007) were significantly lower. For interrater reliability, intraclass correlation (ICC) values were good for autopsy (ICC=.723, 95% CI .667-.771, P<.001) and postmortem examination (ICC=.758, 95% CI .727-.787, P<.001). Postmortem examinations performed using Glass took 42.6 seconds longer than those done with the DSLR camera (z=-2.100, P=.04 using Wilcoxon signed rank test). The battery charge of Glass quickly decreased; an average 5.5% (SD 1.85) of its battery capacity was spent per postmortem examination (0.81% per minute or 0.79% per picture).CONCLUSIONS: Glass was efficient for acquiring images for documentation in forensic medicine, but the image quality was inferior compared to a DSLR camera. Images taken with Glass received significantly lower ratings for all 4 categories in an autopsy setting and for region of interest and brightness in postmortem examination. The effort necessary for achieving the objectives was higher when using the device compared to the DSLR camera thus extending the postmortem examination duration. Its relative high power consumption and low battery capacity is also a disadvantage. At the current stage of development, Glass may be an adequate tool for education. For deployment in clinical care, issues such as hygiene, data protection, and privacy need to be addressed and are currently limiting chances for professional use.

Resumo Limpo

ckground googl glass promis premarket devic includ optic headmount display sever proof concept report exist littl scientif evid regard use medic settingobject object studi empir determin feasibl deploy glass forens settingmethod glass use combin selfdevelop app allow handsfre oper autopsi postmortem examin deced perform physician digit singlelen reflex dslr camera use imag comparison addit forens examin male femal age rang year age mean year sd mean work experi year sd ask evalu imag imag qualiti point likert scale specif color discrimin bright sharp satisfact acquir region interest statist evalu perform determin glass compar convent acquir digit imagesresult imag receiv good median good rate median categori autopsi imag taken glass n receiv signific lower rate acquir dslr camera n region interest z p sharp z p color z p bright z p imag postmortem examin glass n dslr camera n rate region interest z p bright z p signific lower interrat reliabl intraclass correl icc valu good autopsi icc ci p postmortem examin icc ci p postmortem examin perform use glass took second longer done dslr camera z p use wilcoxon sign rank test batteri charg glass quick decreas averag sd batteri capac spent per postmortem examin per minut per pictureconclus glass effici acquir imag document forens medicin imag qualiti inferior compar dslr camera imag taken glass receiv signific lower rate categori autopsi set region interest bright postmortem examin effort necessari achiev object higher use devic compar dslr camera thus extend postmortem examin durat relat high power consumpt low batteri capac also disadvantag current stage develop glass may adequ tool educ deploy clinic care issu hygien data protect privaci need address current limit chanc profession use

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