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Sonography does not use ionizing radiation, and the power levels used for imaging are too low to cause adverse heating or pressure effects in tissue. [ 38 ] [ 39 ] Although the long-term effects due to ultrasound exposure at diagnostic intensity are still unknown, [ 40 ] currently most doctors feel that the benefits to patients outweigh the ...
Ultrasound is non-invasive and does not involve radiation, unlike some methods of imaging of the urinary tract such as X-rays or CT scans. [2] It is usually painless. [2] It is safe in pregnancy. [1] Risks specific to the scan involve: Discomfort from the abdominal probe [1] Distress related to results that are reported
Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles. Ionizing radiation carries more than 10 electron volts (eV), which is enough to ionize atoms and molecules and break chemical bonds. This is an important distinction due to the large difference in harmfulness to living organisms.
Recent testing has shown that ultrasound can increase the effectiveness of cancer treatments such as chemotherapy and radiation therapy. This procedure is known as heat or hyperthermia therapy. By using the converted heat energy that ultrasound provides, specific diseased tissues can be heated often to temperatures around 41° to 45 °C.
Rupture is a dreaded complication of aneurysms that can lead to extensive, difficult to control bleeding. Aneurysms can also clot, or thrombose, and rapidly occlude the involved vessel, leading to acute distal ischemia. Aortic aneurysms include thoracic, abdominal and thoracoabdominal aneurysms. Treatment strategies are customized depending on ...
Ultrasound image showing the liver, gallbladder and common bile duct. Medical ultrasound uses high frequency broadband sound waves in the megahertz range that are reflected by tissue to varying degrees to produce (up to 3D) images. This is commonly associated with imaging the fetus in pregnant women. Uses of ultrasound are much broader, however.
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
Cranial ultrasound is a very safe technique as it is non-invasive and does not involve any kind of ionising radiation. However, it is subject to certain limitations. Operator dependency: the quality of images obtained relies on the skill of the person performing sonography.