Ultra‐high frequency ultrasound and machine‐learning approaches for the differential diagnosis of melanocytic lesions

2021 ◽  
Author(s):  
Francesco Faita ◽  
Teresa Oranges ◽  
Nicole Di Lascio ◽  
Francesco Ciompi ◽  
Saverio Vitali ◽  
...  
Keyword(s):  
Machine Learning ◽  
Differential Diagnosis ◽  
High Frequency ◽  
Learning Approaches ◽  
High Frequency Ultrasound ◽  
Ultra High Frequency ◽  
Melanocytic Lesions ◽  
Frequency Ultrasound

Evaluation of frontal fibrosing alopecia with ultra‐high‐frequency ultrasound

2021 ◽  
Author(s):  
Carolina Ávila de Almeida ◽  
Simone Guarçoni ◽  
Bruna Duque Estrada ◽  
Maria Carolina Zafra Páez ◽  
Clarissa Canella
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Ultra High Frequency ◽  
Frequency Ultrasound

Ultra high frequency ultrasound: a promising technique to visualize pelvic floor meshes in vivo

2020 ◽  
Author(s):  
A. W. Kastelein ◽  
B. C. de Graaf ◽  
Y. P. Latul ◽  
K. W. J. Verhorstert ◽  
J. Holthof ◽  
...  
Keyword(s):  
Pelvic Floor ◽  
High Frequency ◽  
High Frequency Ultrasound ◽  
Promising Technique ◽  
Ultra High Frequency ◽  
Frequency Ultrasound

High-Frequency and Ultra-High Frequency Ultrasound: Musculoskeletal Imaging up to 70 MHz

2020 ◽  
Vol 24 (02) ◽  
pp. 125-134 ◽  
Author(s):  
Domenico Albano ◽  
Giacomo Aringhieri ◽  
Carmelo Messina ◽  
Luca De Flaviis ◽  
Luca Maria Sconfienza
Keyword(s):  
High Frequency ◽  
Peripheral Nerves ◽  
Imaging Technique ◽  
Case Series ◽  
Image Resolution ◽  
Ultrastructural Changes ◽  
High Frequency Ultrasound ◽  
Ultra High Frequency ◽  
Time Dynamic ◽  
Frequency Ultrasound

AbstractMusculoskeletal (MSK) ultrasound has well-established advantages, able to investigate very small structures with high resolution and a quick and real-time dynamic evaluation with the possibility of contralateral comparison. Thus ultrasound has kept its own almost exclusive fields of application in daily clinical practice, and it is considered the first-level imaging technique to assess tendons, bursae, and capsuloligamentous structures of small peripheral joints as well as peripheral nerves. Up to now, however, clinical MSK ultrasound imaging could not go beyond the first 1 to 2 cm under the skin, using high-frequency probes up to 18 to 20 MHz with spatial resolution just below millimeters. We present the impressive technical advancements leading to image resolution as low as 30 µm using ultra-high frequency ultrasound (UHFUS) probes up to 70 MHz. High-frequency ultrasound and UHFUS, with frequencies ranging from 22 to 70 MHz, are promising tools to evaluate very superficial structures. In the MSK system, only two articles have assessed its value in limited case series. Future developments may be aimed to better assess ultrastructural changes of very superficial peripheral nerves and other thin structures such as pulleys, retinacula, and tendons.

scholarly journals Analysis of High-Frequency Ultrasound in the differential Diagnosis of Lumps in Foot and Hand

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Huitong Yan ◽  
Heying Li ◽  
Jianmei Han ◽  
Jianmei Han ◽  
Yingbo Tang
Keyword(s):  
Differential Diagnosis ◽  
Giant Cell Tumor ◽  
Giant Cell ◽  
Epidermoid Cyst ◽  
High Frequency ◽  
Preoperative Diagnosis ◽  
Tendon Sheath ◽  
Cell Tumor ◽  
High Frequency Ultrasound ◽  
Frequency Ultrasound

Objective: To investigate the ultrasonogram characteristics of common lumps in hand and foot, pursuing for greater understanding of hand and foot lumps. Methods: 65 cases of ultrasonographic characteristics of lumps in hand and foot were retrospectively analyzed, including the location, size, shape, boundary, internal echo and posterior echo, surrounding relationship and blood flow. Results: Among 65 cases, there were 26 cases of tendon sheath cyst, 16 cases of tenosynovitis giant cell tumor, 10 cases of hemangioma, 4 cases of tendon sheath fibroma, 3 cases of epidermoid cyst, 2 cases of Schwannoma, 2 cases of fibrolipoma, 1 case of angiolipoma and 1 case of neurofibroma. The preoperative and postoperative pathological diagnoses of 45 cases, accounting for 69.23%, were consistent, 3 cases (4.62%) were misdiagnosed, which included that 2 cases of tenosynovitis giant cell tumor were misdiagnosed as tendon sheath cyst, 1 case of neurofibroma as epidermoid cyst, and the preoperative diagnosis of the rest 17 cases(26.15%) were indefinite. Conclusion: The high-frequency ultrasound can diagnose properties of lumps in foot and hand well, providing diagnosis basis for further treatment in clinic.

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