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HARP (algorithm)
Harmonic phase (HARP) algorithm is a medical image analysis technique capable of extracting and processing motion information from tagged magnetic resonance image (MRI) sequences. It was initially developed by N. F. Osman and J. L. Prince at the Image Analysis and Communications Laboratory at Johns Hopkins University. The method uses spectral peaks in the Fourier domain of tagged MRI, calculating the phase images of their inverse Fourier transforms, which are called harmonic phase (HARP) images. The motion of material points through time is then tracked, under the assumption that the HARP value of a fixed material point is time-invariant. The method is fast and accurate, and has been accepted as one of the most popular tagged MRI analysis methods in medical image processing. Background In cardiac magnetic resonance imaging, tagging techniques make it possible to capture and store the motion information of myocardium in vivo. MR tagging uses a special pulse sequence to create te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linux
Linux ( or ) is a family of open-source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991, by Linus Torvalds. Linux is typically packaged as a Linux distribution, which includes the kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name "GNU/Linux" to emphasize the importance of GNU software, causing some controversy. Popular Linux distributions include Debian, Fedora Linux, and Ubuntu, the latter of which itself consists of many different distributions and modifications, including Lubuntu and Xubuntu. Commercial distributions include Red Hat Enterprise Linux and SUSE Linux Enterprise. Desktop Linux distributions include a windowing system such as X11 or Wayland, and a desktop environment such as GNOME or KDE Plasma. Distributions intended for ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Circulation (journal)
''Circulation'' is a scientific journal published by Lippincott Williams & Wilkins for the American Heart Association. The journal publishes articles related to research in and the practice of cardiovascular diseases, including observational studies, clinical trials, epidemiology, health services and outcomes studies, and advances in applied (translational) and basic research. Its 2020 impact factor is 29.690, ranking it third among journals in the Cardiac and Cardiovascular Systems category and first in the Peripheral Vascular Disease category.2020 Journal Citation Reports (Clarivate Analytics, 2021) Articles become open access after a 12-month embargo period. 2008 saw the appearance of six subspecialty journals. The first edition of ''Circulation: Arrhythmia and Electrophysiology'' appeared in April 2008, followed by an edition dedicated to heart failure in May titled ''Circulation: Heart Failure''. The remaining four journals launched once per month from July through October ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardiac Imaging
Cardiac imaging refers to non-invasive imaging of the heart using ultrasound, magnetic resonance imaging (MRI), computed tomography (CT), or nuclear medicine (NM) imaging with PET or SPECT. These cardiac techniques are otherwise referred to as echocardiography, Cardiac MRI, Cardiac CT, Cardiac PET and Cardiac SPECT including myocardial perfusion imaging. Indications A physician may recommend cardiac imaging to support a diagnosis of a heart condition. Medical specialty professional organizations discourage the use of routine cardiac imaging during pre-operative assessment for patients about to undergo low or mid-risk non-cardiac surgery because the procedure carries risks and is unlikely to result in the change of a patient's management., citing * * Stress cardiac imaging is discouraged in the evaluation of patients without cardiac symptoms or in routine follow-ups. Echocardiography ''Transthoracic echocardiography'' uses ultrasonic waves for continuous heart chamber and bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strain–encoded Magnetic Resonance Imaging
Strain–encoded magnetic resonance imaging (SENC-MRI) is a magnetic resonance imaging technique for imaging the strain of deforming tissue. It is undergoing testing to diagnose some heart diseases, particularly congenital right ventricle dysfunctions, which are difficult to diagnose. It is an improvement on magnetic resonance elastography Magnetic resonance elastography (MRE) is a form of elastography that specifically leverages Magnetic resonance imaging, MRI to quantify and subsequently map the mechanical properties (Elasticity (physics), elasticity or stiffness) of soft tissue. F ... in that it has a faster imaging time, and less post-processing time, to turn the acquired data into a useful image. To use the technique, the gradient coils in the MRI equipment need to be driven with special pulse sequences, designed for specific tissues, that "tags" deformation of the tissue, such that tissue that deforms more is brighter, or darker, as needed. Using a baseline measurement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newton–Raphson
In numerical analysis, Newton's method, also known as the Newton–Raphson method, named after Isaac Newton and Joseph Raphson, is a root-finding algorithm which produces successively better approximations to the roots (or zeroes) of a real-valued function. The most basic version starts with a single-variable function defined for a real variable , the function's derivative , and an initial guess for a root of . If the function satisfies sufficient assumptions and the initial guess is close, then :x_ = x_0 - \frac is a better approximation of the root than . Geometrically, is the intersection of the -axis and the tangent of the graph of at : that is, the improved guess is the unique root of the linear approximation at the initial point. The process is repeated as :x_ = x_n - \frac until a sufficiently precise value is reached. This algorithm is first in the class of Householder's methods, succeeded by Halley's method. The method can also be extended to complex functions an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HARP Tracking
The harp is a stringed musical instrument that has a number of individual string (music), strings running at an angle to its sound board (music), soundboard; the strings are plucked with the fingers. Harps can be made and played in various ways, standing or sitting, and in orchestras or concerts. Its most common form is triangular in shape and made of wood. Some have multiple rows of strings and pedal attachments. Ancient depictions of harps were recorded in Current-day Iraq (Mesopotamia), Iran (Iran, Persia), and Egypt, and later in India and China. By medieval times harps had spread across Europe. Harps were found across the Americas where it was a popular Folk music, folk tradition in some areas. Distinct designs also emerged from the African continent. Harps have symbolic political traditions and are often used in logos, including in Ireland. History Harps have been known since antiquity in Asia, Africa, and Europe, dating back at least as early as 3000 BCE. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proc Int Conf Imag Proc
{{disambiguation ...
Proc may refer to: * Proč, a village in eastern Slovakia * ''Proč?'', a 1987 Czech film * procfs or proc filesystem, a special file system (typically mounted to ) in Unix-like operating systems for accessing process information * Protein C (PROC) * Proc, a term in video game terminology * Procedures or process, in the programming language ALGOL 68 * People's Republic of China, the formal name of China * the official acronym for the Canadian House of Commons Standing Committee on Procedure and House Affairs The Canadian House of Commons Standing Committee on Procedure and House Affairs (PROC) is a standing committee (Canada), standing committee composed of the four Political party, political parties of the Government of Canada that is responsible for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HARP Algorithm Processing
The harp is a stringed musical instrument that has a number of individual strings running at an angle to its soundboard; the strings are plucked with the fingers. Harps can be made and played in various ways, standing or sitting, and in orchestras or concerts. Its most common form is triangular in shape and made of wood. Some have multiple rows of strings and pedal attachments. Ancient depictions of harps were recorded in Current-day Iraq (Mesopotamia), Iran (Persia), and Egypt, and later in India and China. By medieval times harps had spread across Europe. Harps were found across the Americas where it was a popular folk tradition in some areas. Distinct designs also emerged from the African continent. Harps have symbolic political traditions and are often used in logos, including in Ireland. History Harps have been known since antiquity in Asia, Africa, and Europe, dating back at least as early as 3000 BCE. The instrument had great popularity in Europe during the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mag Reson Imag
Mag, MAG or mags may refer to: Arts, entertainment and media * ''MAG'' (video game), 2010 * ''Mag'' (Slovenian magazine), 1995–2010 * ''The Mag'', a British music magazine Businesses and organisations * MacKenzie Art Gallery, in Regina, Saskatchewan, Canada * Manchester Airport Holdings, trading as MAG, a British holding company * Maricopa Association of Governments, the regional agency for the greater Maricopa region in Arizona, U.S. * Mines Advisory Group, a non-governmental organization * Motorcycle Action Group, a British motorcyclists' rights group * Mount Albert Grammar School (MAGS), in Auckland, New Zealand * MAG motorcycle engines, manufactured by Motosacoche * Hungarian General Machine Factory (), a former automobile and aircraft manufacturer Military * a United States Marine Corps aviation group ** * FN MAG, a machine gun Places * Mag, Săliște, Sibiu County, Romania ** Mag (river) * Madang Airport Madang Airport , is an airport located in Madang, Papua New G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mac OS X
macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac (computer), Mac computers. Within the market of desktop and laptop computers it is the Usage share of operating systems#Desktop and laptop computers, second most widely used desktop OS, after Microsoft Windows and ahead of ChromeOS. macOS succeeded the classic Mac OS, a Mac operating system with nine releases from 1984 to 1999. During this time, Apple cofounder Steve Jobs had left Apple and started another company, NeXT Computer, NeXT, developing the NeXTSTEP platform that would later be acquired by Apple to form the basis of macOS. The first desktop version, Mac OS X 10.0, was released in March 2001, with its first update, 10.1, arriving later that year. All releases from Mac OS X Leopard, Mac OS X 10.5 Leopard and after are UNIX 03 certified, with an exception for OS X Lion, OS X 10. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magn Reson Med
''Magnetic Resonance in Medicine'' is a monthly peer-reviewed medical journal covering research on all aspects of the development and use of nuclear magnetic resonance and electron paramagnetic resonance techniques for medical applications. It was established in 1984 and is published by Wiley Wiley may refer to: Locations * Wiley, Colorado, a U.S. town * Wiley, Pleasants County, West Virginia, U.S. * Wiley-Kaserne, a district of the city of Neu-Ulm, Germany People * Wiley (musician), British grime MC, rapper, and producer * Wiley Mil ... on behalf of thInternational Society for Magnetic Resonance in Medicine External links *{{Official website, http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1522-2594 Medical physics journals Monthly journals Wiley-Blackwell academic journals English-language journals Publications established in 1984 Radiology and medical imaging journals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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