Evolution of photography in maxillofacial surgery: from analog to 3D photography &amp;ndash; an overview

Schaaf, Helmut; Malik, Christoph Yves; Howaldt, Hans‐Peter; Streckbein, Philipp

doi:10.2147/ccide.s6760

Cited by 15 publications

(3 citation statements)

References 49 publications

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“…While direct anthropometry has always been accepted as the gold standard in facial analysis because of its simplicity and low cost, the need for long clinical sessions and well-trained examiners has been a hindrance [30][31][32] . Stereophotogrammetry presents a safe, non-invasive technique free of ionizing radiation in longitudinal studies 33 . Several papers present promising results for the use of this technique, but inconsistent terminologies and statistical tests for error analysis are a challenge.…”

Section: Discussionmentioning

confidence: 99%

Accuracy evaluation of tridimensional images performed by portable stereophotogrammetric system

Júnior

Magri

Cazal

et al. 2019

Rev. odontol. UNESP

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Introduction Human facial characteristics vary according to individual dental occlusion, facial harmony, orofacial musculature and the format and configuration of craniofacial structures. Traditionally, anthropometric measurements have been acquired through direct evaluation of subjects in a clinical environment using calipers and metric tapes to measure distances between arches and landmarks. Scientific breakthroughs have enabled the digitization of data and introduced the possibility of quick, precise, radiation-free acquisitions; details can be archived for future analysis and easily shared with patients and colleagues. Among new facial analysis methods, the stereophotogrammetry technique has emerged, which uses a group of cameras to take many photographs of a subject in rapid succession from multiple angles. Nowadays, portable stereophotogrammetric systems are being proposed, as they are more practical and easier to use. Objective The aim of this work was to analyze the accuracy and reproducibility of a portable 3D stereophotogrammetric system (Vectra H1, Canfield, Fairfield, NJ, USA) in measuring soft facial tissues of 30 participants, defining measures of a cube and comparing these measurements with those obtained by a set 3D stereophotogrammetric system (Vectra M3, Canfield, Fairfield, NJ, USA) with previously validated accuracy and reproducibility through quantitative analysis of possible errors. Material and method Thirty temporary landmarks were used to measure (in mm) 34 distances in 30 participants (n = 30). Regarding the cube, 12 angles and 9 linear distances were evaluated. Result The results obtained by the established methodology indicated that the Vectra H1 portable system has shown accuracy and reproducibility equal to that of the Vectra M3 set system. Conclusion Data analysis and correlation to literature findings show Vectra H1's capability to reliably capture tridimensional images, which makes it practical for use in diverse clinical applications.

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Section: Discussionmentioning

confidence: 99%

Accuracy evaluation of tridimensional images performed by portable stereophotogrammetric system

Júnior

Magri

Cazal

et al. 2019

Rev. odontol. UNESP

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“…These technological advancements have unleashed medical professionals’ ability to document a patient’s clinical progression, including details for wound documentation, for example, to avoid repeated medical examinations, and seeing wound progression over time [ 5 , 6 ]. In medical fields that rely heavily on visual physical examinations, such as plastic surgery [ 7 ], maxillo-facial surgery [ 8 ], and orthopaedic surgery [ 9 ], medical photography can also significantly help patient care [ 10 , 11 ]. Among dermatologists that frequently inspect suspicious lesions, one study found that 89% of the respondents agree that medical photography facilitates patient care [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Medical Photography Usage Amongst Doctors at a Portuguese Hospital

Cura

Alves

Andrade

2022

IJERPH

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Technological advancements in smartphones have made it possible to create high-quality medical photographs, with the potential to revolutionise patient care. To ensure the security of the patient’s data, it is important that medical professionals receive informed consent from the patient, that physical conditions are met to take a photograph, and that these medical images are stored correctly. This study aimed to determine if medical professionals of an academic hospital make use of medical photography, and how the content is obtained, stored, transferred, and used. Methods: A 30-question questionnaire was distributed across 29 medical departments at Centro Hospitalar Universitário de São João (CHUSJ), a tertiary referral and teaching hospital in Porto, Portugal, with approximately 900 medical professionals. Quantitative statistical methods were used to analyse questionnaire responses. Results: There were a total of 257 respondents. Of these, 93% used medical photography, 70% used it to document a patient’s clinical progress, 70% to ask for a second opinion, 56% for education, 65% for research and publication, and 68% to present at medical conferences. Medical photography was used by 33% weekly and 36% monthly, with 71% of respondents always asking for the patients’ consent before taking a photograph. Doctors aged 20–40 years used photography more often than doctors over 40 years of age to document the clinical progress of the patients (77% and 52%, respectively, p = 0.01) and to ask for a second opinion (78% and 52%, respectively, p < 0.001). Conclusions: Our study shows that medical photography is a common practice amongst medical doctors. However, appropriate measures need to be created to obtain patients’ consent, store images, and sure the security of patients’ information.

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“…It used a CCD (Charge-coupled-device) sensor, which consists of a panel of photosensitive diodes that capture the image data together with a storage panel that picks up the images and represents an analog-moving register. This allows the analogic signals (electric charge) to be transported in several successive steps under the control of a clock signal [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

End-User Skin Analysis (Moles) through Image Acquisition and Processing System

Szolga

Bozga

Florea

2022

Sensors

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Skin moles and lesions can be the first signs of severe skin diseases such as cancer. This paper presents the development of an end-user device capable of capturing images, segmentation and diagnosis of moles by using the ABCD rule, which stands for analyzing moles’ parameters as: asymmetry, border, color, and diameter. These are the main mole characteristics that doctors look at, each of them having a different factor of importance, and depending on these an accurate diagnosis can be given. For the hardware, we developed a small and compact device that can be manipulated easily by anyone without knowledge of medicine, in which we considered a custom-designed 3D enclosure with two white LEDs to control the light. The device has the role of facilitating analysis of the suspicious moles regularly at home, even if only from an indicative and not from a medical point of view. The developed PC software permits the storage of the images in a local database for easy tracking and analysis in time. The image processing developed for the ABCD rule is incorporated into the PC software and tested extensively on the international PH2 database with skin melanoma images to validate our segmentation and criteria evaluation. Using the developed device, we captured mole images for patients, who also took a medical examination by a specialist using the standard dermatoscope. Therefore, we obtained our own database containing 26 images for which we have also the specialists’ diagnosis. The performance evaluation measures obtained using our device are—Accuracy: 0.92, Precision: 1.0, Recall: 0.92, F1-score: 0.96.

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Evolution of photography in maxillofacial surgery: from analog to 3D photography – an overview

Cited by 15 publications

References 49 publications

Accuracy evaluation of tridimensional images performed by portable stereophotogrammetric system

Accuracy evaluation of tridimensional images performed by portable stereophotogrammetric system

Medical Photography Usage Amongst Doctors at a Portuguese Hospital

End-User Skin Analysis (Moles) through Image Acquisition and Processing System

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