TAILIEUCHUNG - High resolution ultrasound imaging of melanocytic and other pigmented lesions of the skin

For two main reasons, dermatology is one of the later medical disciplines to use imaging techniques: skin lesions are readily visible to the naked eye or through a magnifying glass, allowing clinical diagnosis with no invasive examination; skin lesions can easily be biopsied or removed for histological study. This approach has therefore remained the basis of clinicopathological diagnosis of skin diseases for a long time. There has also been a third factor. | 8 High Resolution Ultrasound Imaging of Melanocytic and Other Pigmented Lesions of the Skin Laurent Machet Mahtab Samimi Gabriella Georgesco Youssef Mourtada Michael Naouri Jean Marc Grégoire Frédéric Ossant Frédéric Patat and Loi c Vaillant Department of Dermatology CHRU Tours UMRS Inserm U930 CNRS ERL 3106 Tours CIC-IT CHRU Tours Université ỉranẹois Rabelais Tours France 1. Introduction For two main reasons dermatology is one of the later medical disciplines to use imaging techniques 1 skin lesions are readily visible to the naked eye or through a magnifying glass allowing clinical diagnosis with no invasive examination 2 skin lesions can easily be biopsied or removed for histological study. This approach has therefore remained the basis of clinicopathological diagnosis of skin diseases for a long time. There has also been a third factor . the technical factors limiting image resolution 1-12 . It is often necessary to visualise sub-centimeter lesions or even smaller as in the case when measuring the thickness of a melanoma and this cannot be achieved using traditional 7-10 MHz ultrasound. However such techniques are useful in dermatology especially in detecting lymph node spread of melanoma 6 13 14 . Other techniques such as optical coherence tomography and confocal microscopy are now available with better resolution than 20-100 MHz ultrasound. However both are more expensive and more time-consuming than ultrasound. Moreover in certain European countries . France and Germany ultrasound examination of the skin is reimbursed by health insurance services. High resolution ultrasound imaging systems enable ultrasound to differentiate structures of less than 100 microns on the beam axis axial resolution and 200 microns on the scan axis resolution axis . This can be achieved by the use of ultrasound frequencies above 15 MHz. Several groups have been working to extend the limits of existing machines by increasing the frequency 11 12 15 16 . Working in our group .

• Y khoa - Dược
• High resolution ultrasound imaging
• Ultrasound imaging of melanocytic
• Other pigmented lesions of the skin
• The skin lesions
• Clinicopathological diagnosis of skin diseases
• BMC Veterinary Research
• MRI microscopy
• Ultrasound biomicroscopy
• Conventional ultrasonography
• Magnetic resonance imaging