Ultrasound energy refers to sound waves that have frequencies higher than the upper limit of human hearing, typically above 20 kHz. While humans can hear sounds ranging from about 20 Hz to 20 kHz, ultrasound is utilized in various fields due to its unique properties and capabilities.
Vaginal ultrasonography, also known as transvaginal ultrasound, is a medical imaging procedure that uses high-frequency sound waves to create detailed images of the female reproductive organs, including the uterus, ovaries, cervix, and surrounding structures. This technique involves inserting a small, wand-like device called a transducer into the vaginal canal, which allows for closer proximity to the pelvic organs compared to abdominal ultrasound.
The 12th century was notable for the gradual introduction of classical knowledge in Europe, particularly the works of ancient mathematicians and scholars. While there weren't many prominent mathematicians in England during the 12th century specifically, this period was marked by significant developments in the mathematical and scientific fields, largely due to the influence of translations from Arabic and Latin texts.
Byrhtferth was an English monk, scholar, and author who lived during the late 10th and early 11th centuries, roughly around 970 to 1020. He is best known for his works on grammar, timekeeping, and mathematics, as well as for his role in promoting literacy and learning in Anglo-Saxon England.
Virgil of Salzburg, also known as Saint Virgil, was an important early Christian bishop and theologian in what is now Austria. He is believed to have been born around 700 AD and is recognized for his role as the Bishop of Salzburg from approximately 745 until his death in 784. Virgil is known for his contributions to the spread of Christianity in the region and his efforts in establishing monastic and ecclesiastical structures.
Dodecaphony, or twelve-tone technique, is a method of musical composition devised by Austrian composer Arnold Schoenberg in the early 20th century. It involves using all twelve tones of the chromatic scale in a particular order (known as a tone row) as the basis for a composition, while aiming to avoid establishing a traditional tonal center. Serialism extends this concept beyond just pitch to encompass other musical elements such as rhythm, dynamics, and timbre.
Heterostasis is a concept from cybernetics that refers to the ability of a system to maintain stability through adaptation and change. Unlike homeostasis, which focuses on maintaining equilibrium or stability within a system by counteracting disturbances, heterostasis acknowledges that systems must sometimes adjust or change their functioning in response to varying external conditions in order to maintain overall stability. In cybernetic terms, heterostasis emphasizes the dynamic interactions and feedback loops that allow a system to respond effectively to external influences and changes.
Penile ultrasonography is a medical imaging technique used to visualize the anatomy and blood flow of the penis. It employs ultrasound technology, which utilizes sound waves to create images of the internal structures. This non-invasive procedure is commonly used to assess various conditions related to erectile dysfunction, penile abnormalities, and vascular issues. ### Key Uses of Penile Ultrasonography: 1. **Erectile Dysfunction Evaluation:** It can help determine if there are vascular causes for erectile dysfunction by measuring blood flow to the penis.
Pre-hospital ultrasound refers to the use of ultrasound imaging in emergency medical services (EMS) settings, typically conducted by paramedics or emergency medical technicians (EMTs) before a patient arrives at the hospital. This application is part of a growing trend towards utilizing bedside ultrasound in emergency and critical care to enhance patient assessment and management in the field.
Pyelectasis is a medical term that refers to the dilation or enlargement of the renal pelvis, which is the area of the kidney where urine collects before it moves to the ureter and then to the bladder. This condition can be seen on imaging studies such as ultrasound and is often evaluated in the context of potential urinary obstruction or other renal issues.
Renal ultrasonography, also known as renal ultrasound, is a non-invasive imaging technique used to evaluate the kidneys and surrounding structures. It utilizes high-frequency sound waves to create images of the kidneys, enabling healthcare providers to assess their size, shape, and structure, as well as to identify any abnormalities or conditions affecting them. **Key Uses of Renal Ultrasonography:** 1. **Assessment of Kidney Size and Structure:** It helps in measuring the kidneys' dimensions and detecting structural anomalies.
A scrotal ultrasound is a medical imaging procedure that uses high-frequency sound waves to create images of the structures within the scrotum, which is the pouch of skin that contains the testicles. This non-invasive test is commonly used to evaluate various conditions affecting the testicles, epididymis, and surrounding structures.
The Society of Diagnostic Medical Sonography (SDMS) is a professional organization dedicated to advancing the practice of diagnostic medical sonography and promoting the profession's awareness and standards. Founded in 1970, the SDMS provides resources, education, and advocacy for sonographers and other professionals in the field of medical imaging.
The Sonographic Murphy sign is an ultrasound finding used primarily in the diagnosis of acute cholecystitis, which is inflammation of the gallbladder, usually due to gallstones. During ultrasound examination of the gallbladder, the Sonographic Murphy sign is elicited by applying pressure with the ultrasound transducer over the gallbladder area. If the patient experiences pain or tenderness in response to this pressure, it is considered a positive Murphy sign.
Sonophoresis is a non-invasive technique that uses ultrasound waves to enhance the delivery of drugs and other therapeutic agents through the skin and into the underlying tissues. The ultrasound waves create mechanical vibrations that temporarily increase the permeability of the skin, allowing larger molecules or hydrophilic substances to penetrate more effectively. This method is often used in dermatology and cosmetic applications to promote the absorption of certain medications, nutrients, or active ingredients, particularly in transdermal drug delivery systems.
Speckle tracking echocardiography (STE) is a cardiac imaging technique that allows for the assessment of myocardial deformation (strain) by tracking the motion of acoustic speckles in ultrasound images. Instead of just providing information about the heart's structure and function through standard two-dimensional or three-dimensional echocardiography, STE provides insights into the heart muscle's ability to stretch and contract.
Chris Freiling is a mathematician known for his work in the field of topology, particularly in relation to the concept of covering spaces and various aspects of set theory. He is affiliated with research and academic institutions where he contributes to mathematical research and education.
The Squarcialupi Codex is a significant manuscript containing a collection of medieval music, specifically from the 14th century, which is thought to be compiled in the early 15th century. It is named after the Italian musicologist and collector Antonio Squarcialupi, who owned it in the 15th century.
The Trinity Carol Roll is a medieval manuscript that contains a collection of Christmas carols and seasonal songs, primarily in Middle English. It is believed to date back to the 15th century and is notable for being one of the earliest known collections of Christmas music in English. The manuscript is housed in Trinity College, Cambridge, and provides valuable insight into the musical traditions and practices of the time.