Improvement of monitoring of melanocytic skin lesions with the use of a computerized acquisition and surveillance unit with a skin surface microscopic television camera

Stolz, Wilhelm; Schiffner, R.; Pillet, Laure; Vogt, Thomas; Harms, Harry; Schindewolf, Thomas; Ing, Dipl; Landthaler, Míchael; Abmayr, W.

doi:10.1016/s0190-9622(96)90324-2

Cited by 74 publications

(61 citation statements)

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“…However, the rate of dermoscopic change observed in our series of nevi cannot be compared directly with rates seen in follow-up studies with different inclusion criteria or in studies evaluating melanocytic nevi located on nonglabrous skin. 11,17,21,22 Kittler et al 11 observed substantial dermoscopic change over time in 5.9% of common nevi and in 9.1% of atypical nevi after a median follow-up of 12.6 months. In a subsequent study, 17 researchers showed that nearly 80% of nevi with a peripheral rim of brown globules enlarged during a median follow-up period of 11.4 months.…”

Section: Commentmentioning

confidence: 99%

Dermoscopic Changes in Acral Melanocytic Nevi During Digital Follow-up

et al. 2007

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Section: Commentmentioning

confidence: 99%

Dermoscopic Changes in Acral Melanocytic Nevi During Digital Follow-up

et al. 2007

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“…The use of digital imaging in dermatology has already been investigated several times, mostly using color spaces like RGB and related spaces like HSV [1], [2], [3], [4]. The problem with this approach is that there are literally thousands of different RGB spaces because RGB is dependent on the imaging system, i.e.…”

Section: Introductionmentioning

confidence: 99%

An imaging system with calibrated color image acquisition for use in dermatology

Haeghen

Naeyaert

Lemahieu

et al. 2000

IEEE Trans. Med. Imaging

133

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Abstract-We propose a novel imaging system useful in dermatology, more precisely for the follow-up of patients with an increased risk of skin cancer. The system consists of a Pentium PC equipped with a RGB frame grabber, a 3-chip CCD camera controlled by the serial port and equipped with a zoom lens and a halogen annular light source.Calibration of the imaging system provides a way to transform the acquired images, which are defined in an unknown color space, to a standard well-defined color space called sRGB. sRGB has a known relation to the CIE 1 XYZ and CIE L * a * b * colorimetric spaces. These CIE color spaces are based on the human vision, and allow the computation of a color difference metric called CIE ∆E * ab , which is proportional to the color difference as seen by a human observer. Several types of polynomial RGB to sRGB transforms will be tried, including some optimized in perceptually uniform color spaces. The use of a standard and well-defined color space also allows meaningful exchange of images, e.g. in teledermatology.The calibration procedure is based on 24 patches with known color properties, and takes about 5 minutes to perform. It results in a number of settings called a profile which remains valid for tens of hours of operation. Such a profile is checked prior to acquiring images using just one color patch, and is adjusted on the fly to compensate for short-term drift in the response of the imaging system. Precision or reproducibility of subsequent color measurements is very good with ∆E * ab = 0.3 and ∆E * ab < 1.2. Accuracy compared to spectrophotometric measurements is fair with ∆E * ab = 6.2 and ∆E * ab < 13.3.

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“…The frequency of modifications observed in our study are comparable to a smaller follow-up study by Stolz and coworkers. 3 Braun et al 5 observed modifications over time in 69% of nevi. This high frequency of modifications may be explained by the fact that this study included a high proportion of Spitz nevi.…”

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confidence: 99%

“…In contrast, digital epiluminescence microscopic (DELM) 3-7 images of melanocytic skin lesions can be stored, sorted, retrieved, and compared easily, and therefore are especially useful for the follow-up of melanocytic skin lesions. [3][4][5] Furthermore, epiluminescence microscopy (ELM) of melanocytic skin lesions reveals numerous elementary structures that are not seen with total body photographs or with photographic close-ups without ELM.7-15 Therefore, we used DELM to study the modifications observed over time in acquired common melanocytic nevi and analyzed the frequency and characteristics of enlarging acquired common nevi. …”

mentioning

confidence: 99%

“…Follow-up of a large number of melanocytic nevi using photographic close-ups is impracticable, considering the time and work needed for retrieval and comparison of photographs. In contrast, digital epiluminescence microscopic (DELM) [3][4][5][6][7] images of melanocytic skin lesions can be stored, sorted, retrieved, and compared easily, and therefore are especially useful for the follow-up of melanocytic skin lesions. [3][4][5] Furthermore, epiluminescence microscopy (ELM) of melanocytic skin lesions reveals numerous elementary structures that are not seen with total body photographs or with photographic close-ups without ELM.…”

mentioning

confidence: 99%

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