12A-1 Concentration Requirements for Subharmonic Quantitative Contrast Enhanced High Frequency Ultrasound Flow Studies

2007 ◽  
Author(s):  
S. A. Stapleton ◽  
A. Needles ◽  
E. Henderson ◽  
F. S. Foster
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Contrast Enhanced ◽  
Frequency Ultrasound

scholarly journals Case Report: Dermoscopic, High-Frequency Ultrasound, Contrast-Enhanced Ultrasound Appearances and Special Treatment of a Patient With Syringoid Eccrine Carcinoma on the Chest

2021 ◽  
Vol 11 ◽  
Author(s):  
Jing Zhang ◽  
Xun Liu ◽  
Mo Zheng ◽  
Jing Yin ◽  
Weibin Xing
Keyword(s):  
High Frequency ◽  
Fibrous Tissue ◽  
Pathological Examination ◽  
Contrast Enhanced Ultrasound ◽  
High Frequency Ultrasound ◽  
Dermatology Clinic ◽  
Contrast Enhanced ◽  
Suturing Technique ◽  
Eccrine Carcinoma ◽  
Frequency Ultrasound

This article aims to explain the use of a variety of noninvasive of minimally invasive examinations to obtain reliable diagnostic clues. The choice of treatment methods and repair techniques for wound defects are also critical in terms of the prognosis. Here, we describe the case of a 53-year-old male patient who visited our dermatology clinic due to a red plaque on the inner side of his left nipple without any symptoms for more than 30 years. He was given dermoscopy, high-frequency ultrasound (HFUS), Color Doppler flow imaging (CDFI), and contrast-enhanced ultrasound (CEUS) examinations. Currently, there are no literatures on these auxiliary examinations for this disease. Dermoscopy revealed that there were abundant blood vessels on the periphery of the skin lesion with obvious dilation. HFUS revealed an inhomegeneous hypoechoic solid mass in the dermis with clear borders and irregular shape. CDFI indicated that there are abundant blood flow signals in the periphery and central of the tumor. CEUS showed a mixed inhomogeneous, grid-like high-enhancement pattern. Based on the above auxiliary findings, the possibility of malignant lesion was suspected. Therefore, the patient was given a pathological examination, which showed that many luminal structures of the dermis layer were embedded in the hyperplastic fibrous tissue. The atypical cells were not obvious but showed an infiltrating growth pattern. Immunohistochemistry showed positive reaction for cytokeratin 7 (CK7), epithelial membrane antigen (EMA), and carcinoembryonic antigen (CEA) and a weak positive results was obtained for S-100. There was also a negative result for CK20, gross cystic disease fluid protein 15 (GCDFP-15), and P63. As a result, the patient was diagnosed with “syringoid eccrine carcinoma.” The treatment was surgical excision. Mohs microsurgery was combined with the looped, broad, and deep-buried suturing technique (LBD tension-reduced suturing technique). This technique directly sutures the wound instead of carrying out traditional skin grafting or flap transfer. The postoperative follow-up results were satisfactory as no obvious keloid formed on the wound during the follow-ups. In conclusion, ultrasound is greatly advantageous in tumor morphology and hemodynamics. It orients the therapeutic management and assesses the therapeutic efficacy and the tumoral prognosis. In surgical treatments, a less-traumatic operation should be selected to reduce the patient’s pain.

scholarly journals Advances in vascular anatomy and pathophysiology using high resolution and multiparametric sonography

2021 ◽  
pp. 112972982110201
Author(s):  
Petrucci Ilaria ◽  
Meola Mario ◽  
Fiorina Ilaria
Keyword(s):  
Shear Wave ◽  
Vascular Access ◽  
High Frequency ◽  
Pulse Wave ◽  
Shear Wave Elastography ◽  
Contrast Enhanced Ultrasound ◽  
High Frequency Ultrasound ◽  
Contrast Enhanced ◽  
Wave Imaging ◽  
Frequency Ultrasound

B-mode and Color Doppler are the first-line imaging modalities in cardiovascular diseases. However, conventional ultrasound (US) provides a lower spatial and temporal resolution (70–100 frames per second) compared to ultrafast technology which acquires several thousand frames per second. Consequently, the multiparametric ultrafast platforms manage new imaging algorithms as high-frequency ultrasound, contrast-enhanced ultrasound, shear wave elastography, vector flow, and local pulse wave imaging. These advances allow better ultrasound performances, more detailed blood flow visualization and vessel walls’ characterization, and many future applications for vascular viscoelastic properties evaluation. In this paper, we provide an overview of each new technique’s principles and concepts and the real or potential applications of these modalities on the study of the artery and venous anatomy and pathophysiology of the upper limb before and after creating a native or prosthetic arterio-venous fistula. In particular, we focus on high-frequency ultrasound that could predict cannulation readiness and its potential role in the venous valvular status evaluation before vascular access creation; on contrast-enhanced ultrasound that could improve the peri-operative imaging evaluation during US-guided angioplasty; on shear wave elastography and local pulse wave imaging that could evaluate preoperative vessels stiffness and their potential predictive role in vascular access failure; on vector flow imaging that could better characterize the different components of the vascular access complex flow.

Sign in / Sign up

Export Citation Format

Share Document