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Clin Neurophysiol 2021 Mar 26. Epub 2021 Mar 26.

Department of Neurology, University Hospital Erlangen, Schwabachanlage 6, 91054 Erlangen, Germany.

Objective: In subarachnoid hemorrhage (SAH), transcranial Doppler/color-coded-duplex sonography (TCD/TCCS) is used to detect delayed cerebral ischemia (DCI). In previous studies, quantitative electroencephalography (qEEG) also predicted imminent DCI. This study aimed to compare and analyse the ability of qEEG and TCD/TCCS to early identify patients who will develop later manifest cerebral infarction. Read More

IEEE Trans Ultrason Ferroelectr Freq Control 2021 Apr 16;PP. Epub 2021 Apr 16.

Inertial cavitation induced by pulsed high intensity focused ultrasound (pHIFU) has previously been shown to successfully permeabilize tumor tissue and enhance chemotherapeutic drug uptake. In addition to HIFU frequency, peak rarefactional pressure (p-), and pulse duration, the threshold for cavitation-induced bioeffects has recently been correlated with asymmetric distortion caused by nonlinear propagation, diffraction and formation of shocks in the focal waveform, and therefore with the transducer F-number. To connect previously observed bioeffects with bubble dynamics and their attendant physical mechanisms, the dependence of inertial cavitation behavior on shock formation was investigated in transparent agarose gel phantoms using high-speed photography and passive cavitation detection (PCD). Read More

Skeletal Radiol 2021 Apr 15. Epub 2021 Apr 15.

CIM SA Cabinet Imagerie Médicale, CH 1208, Geneva, Switzerland.

Objective: To describe the ultrasound (US) features of 18 patients with extensor digitorum communis stenosing tenosynovitis (EDCST).

Materials And Methods: A retrospective search in the radiologic information systems of two separate Institutions was performed to identify all patients presenting EDCST between January 2010 and September 2019. A total of 18 patients (ten males and eight females; mean age, 57. Read More

IEEE Trans Ultrason Ferroelectr Freq Control 2021 Apr 14;PP. Epub 2021 Apr 14.

Singular value decomposition (SVD) is a valuable factorization technique used in clutter rejection filtering for power Doppler imaging. Conventionally, SVD is applied to a Casorati matrix of radiofrequency data, which enables filtering based on spatial or temporal characteristics. In this paper, we propose a clutter filtering method that uses a higher-order singular value decomposition (HOSVD) applied to a tensor of aperture data, e. Read More

Mod Rheumatol 2021 Apr 14:1-28. Epub 2021 Apr 14.

Department of Orthopaedic Surgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.

Objectives: We aimed to clarify the clinical implication of ultrasound (US)-detected foot joint inflammation in tightly controlled patients with rheumatoid arthritis (RA).

Methods: We evaluated bilateral foot joints (second to fifth metatarsophalangeal joints of forefoot; tarsometatarsal, cuneonavicular and midtarsal joints of midfoot) of 430 RA patients for synovitis using Power Doppler (PD) imaging by US. We made a cross-sectional and a 3-year longitudinal analysis about the associations of US-detected synovitis with clinical, laboratory and radiographic data as well as foot-specific outcomes using a self-administered foot evaluation questionnaire (SAFE-Q). Read More