1. High-resolution real-time ultrasonic scanner
- Author
-
L. Pourcelot, Frédéric Patat, Loïc Vaillant, and Marceau Berson
- Subjects
Scanner ,Pathology ,medicine.medical_specialty ,Skin Neoplasms ,Materials science ,Acoustics and Ultrasonics ,Radiological and Ultrasound Technology ,Biophysics ,High resolution ,Skin Diseases ,Transducer ,Carcinoma, Basal Cell ,High spatial resolution ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Ultrasonic sensor ,Center frequency ,Normal skin ,Melanoma ,Skin ,Ultrasonography ,Biomedical engineering - Abstract
High spatial resolution is required for echographic exploration of the skin, microvessels or small laboratory animals. With the scanner described here, high resolution is obtained by means of a strongly focused, wide-band 17 MHz center frequency transducer (−6 dB bandwidth: 22 MHz). The movement of this transducer above the skin provides a 6 mm wide and 5 mm deep echographic cross-section with an image rate of 15 images/s. The resolution is about 0.08 mm in axial and 0.2 to 0.3 mm in lateral directions. The device was tested on phantoms in water and in vivo on normal and pathological skin in the Department of Dermatology. With the easy-to-handle probe, explorations were made on psoriasis, basocellular carcinoma, malignant melanoma and sarcoidosis.
- Published
- 1992