3D-printed adaptive acoustic lens as a disruptive technology for transcranial ultrasound therapy using single-element transducers.

3D-printed adaptive acoustic lens as a disruptive technology for transcranial ultrasound therapy using single-element transducers. Phys Med Biol. 2017 Dec 08;: Authors: Maimbourg G, Houdouin A, Deffieux T, Tanter M, Aubry JF Abstract The development of multi-element arrays for better control of the shape of ultrasonic beams has opened the way for focusing through highly aberrating media, such as the human skull. As a result, the use of brain therapy with transcranial-focused ultrasound has rapidly grown. Although effective, such technology is expensive. We propose a disruptive, low-cost approach that consists of focusing a 1-MHz ultrasound beam through a human skull with a single-element transducer coupled with a tailored silicone acoustic lens cast in a 3D-printed mold and designed using computed tomography-based numerical acoustic simulation. We demonstrate on N=3 human skulls that adding lens-based aberration correction to a single-element transducer increases the deposited energy on the target 10 fold. PMID: 29219124 [PubMed - as supplied by publisher]
Source: Physics in Medicine and Biology - Category: Physics Authors: Tags: Phys Med Biol Source Type: research

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Contrast-enhanced ultrasound (CEUS) is an evolving diagnostic alternative to contrast-enhanced computed tomography, magnetic resonance imaging, and fluorescence angiography for the evaluation of vascular diseases. Microbubble contrast material allows imaging of blood flow in microvasculature beyond the resolution of standard imaging techniques and demonstrates potential for the evaluation of tissue perfusion. Several authors have investigated the application of CEUS in the evaluation of myocardial or skeletal muscle perfusion and tumor characterization.
Source: Journal of Vascular Surgery - Category: Surgery Authors: Source Type: research
ConclusionsThe PRESERVE Study represents the largest prospective study ever undertaken to investigate real-world outcomes with contemporary use of IVC filters. The investigators await results with the hope that it can improve patient care.
Source: Journal of Vascular Surgery: Venous and Lymphatic Disorders - Category: Surgery Source Type: research
ConclusionTransgluteal ultrasonography can be used as an excellent modality to examine the position of the femoral head in relation to the posterior rim of the acetabulum in spica cast. The position of the femoral head can be viewed properly needless of perineal opening in the cast. Thus, transgluteal ultrasonography can replace the CT scan to assess the position of the femoral head. Sonography does not expose patients to radiation and does not require sedation.
Source: Journal of Ultrasound - Category: Radiology Source Type: research
CONCLUSION: Laparoscopic management of hydatid cysts of the liver can be performed safely and successfully. This technique can be used in patients with unique, small sized, superficially located cysts, and also has the advantages of other abdominal laparoscopic operations. KEY WORDS: Hepatic hydatid cysts, Laparoscopic surgery. PMID: 31617852 [PubMed - as supplied by publisher]
Source: Annali Italiani di Chirurgia - Category: Surgery Tags: Ann Ital Chir Source Type: research
AdventHealth opened one freestanding ER in Oviedo this week and is in the progress of completing another one. The $3.36 billion Altamonte Springs-based health care system opened a 19,000-square foot, 24-bed facility at 8100 Red Bug Lake Road near the Oviedo Mall. The ER includes two kid-friendly patient rooms, imaging technology like X-ray, CT scan and ultrasound equipment, as well as a medical laboratory . “AdventHealth has provided Central Florida residents compassionate, whole-person care for…
Source: bizjournals.com Health Care:Biotechnology headlines - Category: Biotechnology Authors: Source Type: news
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Source: Progres en Urologie - Category: Urology & Nephrology Tags: Prog Urol Source Type: research
ConclusionThe occurrence of carotid plaques in asymptomatic individuals is underestimated by ultrasound compared to plaque assessment by CTA. Carotid plaque composition by CTA is different in individuals with and without carotid plaques by ultrasound.Key Points•The occurrence of carotid plaques by ultrasound was underestimated in 46% of participants who had plaques by carotid CTA.•Participants with carotid plaques by ultrasound had higher volumes of all plaque subtypes and a higher calcified plaque component as determined by carotid CTA compared to participants without carotid plaques by ultrasound.•A high c...
Source: European Radiology - Category: Radiology Source Type: research
AbstractPurpose of ReviewIn recent years, there has been renewed interest in the use of contrast-enhanced ultrasound (CEUS) in abdominal imaging and intervention. The goal of this article is to review the practical applications of CEUS in the kidney, including renal mass characterization, treatment monitoring during and after percutaneous ablation, and biopsy guidance.Recent FindingsCurrent evidence suggests that CEUS allows accurate differentiation of solid and cystic renal masses and is an acceptable alternative to either computed tomography (CT) or magnetic resonance imaging (MRI) for characterization of indeterminate r...
Source: Current Urology Reports - Category: Urology & Nephrology Source Type: research
Conclusion: Understanding the limits of detection for each IOFB type and imaging modality as well as the characteristic features of different IOFBs is of paramount importance to optimizing the management of ocular trauma patients. PMID: 31609153 [PubMed - as supplied by publisher]
Source: Seminars in Ophthalmology - Category: Opthalmology Tags: Semin Ophthalmol Source Type: research
There is a wide variety of causes of diffuse lung disease in the intensive care unit patient, of which adult respiratory distress syndrome is the commonest clinical consideration. Plain radiography, computed tomography, and ultrasound can be used synergistically to evaluate patients with diffuse lung disease and respiratory impairment. Imaging is not limited to characterization of the cause of diffuse lung disease but also aids in monitoring its evolution and in ventilator setting management.
Source: Radiologic Clinics of North America - Category: Radiology Authors: Source Type: research
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