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- A-scan_ultrasound_biometry abstract "A-scan is an amplitude modulation scan. It gives the information in the form of one dimensional. it is used to detect the presence of flaws in the materials.A-scan ultrasound biometry, commonly referred to as an A-scan, is routine type of diagnostic test used in ophthalmology. The A-scan provides data on the length of the eye, which is a major determinant in common sight disorders. The most common use of the A-scan is to determine eye length for calculation of intraocular lens power. Briefly, the total refractive power of the emmetropic eye is approximately 60. Of this power, the cornea provides roughly 40 diopters, and the crystalline lens 20 diopters. When a cataract is removed, the lens is replaced by an artificial lens implant. By measuring both the length of the eye (A-scan) and the power of the cornea (keratometry), a simple formula can be used to calculate the power of the intraocular lens needed. There are several different formulas that can be used depending on the actual characteristics of the eye.The other major use of the A-scan is to determine the size and ultrasound characteristics of masses in the eye, in order to determine the type of mass. This is often termed quantitative A-scan.Instruments used in this type of test require direct contact with the cornea, however a non-contact instrument has been reported. Disposable covers, which come in actual contact with the eye, have also been evaluated.[1] A-Scan (Ultrasonic Test), A data presentation method by which intelligence signals from a signal object located are displayed. As generally applied to pulse echo ultrasonics, the horizontal and vertical sweeps are proportional to time or distance and amplitude or magnitude respectively. Thus the location and magnitude of acoustical interface are indicated as to depth below the transducer. The term comes from radar technology in World War II, in which it provided the same type of display.".
- A-scan_ultrasound_biometry wikiPageExternalLink 344.
- A-scan_ultrasound_biometry wikiPageExternalLink 458.
- A-scan_ultrasound_biometry wikiPageExternalLink term,A-SCAN%20(UT).
- A-scan_ultrasound_biometry wikiPageID "1428652".
- A-scan_ultrasound_biometry wikiPageLength "2838".
- A-scan_ultrasound_biometry wikiPageOutDegree "8".
- A-scan_ultrasound_biometry wikiPageRevisionID "670835700".
- A-scan_ultrasound_biometry wikiPageWikiLink B-scan_ultrasonography.
- A-scan_ultrasound_biometry wikiPageWikiLink Category:Eye_procedures.
- A-scan_ultrasound_biometry wikiPageWikiLink Category:Medical_ultrasonography.
- A-scan_ultrasound_biometry wikiPageWikiLink Cornea.
- A-scan_ultrasound_biometry wikiPageWikiLink Eye_disease.
- A-scan_ultrasound_biometry wikiPageWikiLink Human_eye.
- A-scan_ultrasound_biometry wikiPageWikiLink List_of_eye_diseases_and_disorders.
- A-scan_ultrasound_biometry wikiPageWikiLink Medical_ultrasound.
- A-scan_ultrasound_biometry wikiPageWikiLink Ophthalmology.
- A-scan_ultrasound_biometry wikiPageWikiLink Ultrasonography.
- A-scan_ultrasound_biometry wikiPageWikiLinkText "A-scan ultrasonography".
- A-scan_ultrasound_biometry wikiPageWikiLinkText "A-scan ultrasound biometry".
- A-scan_ultrasound_biometry hasPhotoCollection A-scan_ultrasound_biometry.
- A-scan_ultrasound_biometry wikiPageUsesTemplate Template:Eye-stub.
- A-scan_ultrasound_biometry subject Category:Eye_procedures.
- A-scan_ultrasound_biometry subject Category:Medical_ultrasonography.
- A-scan_ultrasound_biometry hypernym Modulation.
- A-scan_ultrasound_biometry type AnatomicalStructure.
- A-scan_ultrasound_biometry type Physic.
- A-scan_ultrasound_biometry comment "A-scan is an amplitude modulation scan. It gives the information in the form of one dimensional. it is used to detect the presence of flaws in the materials.A-scan ultrasound biometry, commonly referred to as an A-scan, is routine type of diagnostic test used in ophthalmology. The A-scan provides data on the length of the eye, which is a major determinant in common sight disorders. The most common use of the A-scan is to determine eye length for calculation of intraocular lens power.".
- A-scan_ultrasound_biometry label "A-scan ultrasound biometry".
- A-scan_ultrasound_biometry sameAs m.050sj9.
- A-scan_ultrasound_biometry sameAs Q4647003.
- A-scan_ultrasound_biometry sameAs Q4647003.
- A-scan_ultrasound_biometry wasDerivedFrom A-scan_ultrasound_biometry?oldid=670835700.
- A-scan_ultrasound_biometry isPrimaryTopicOf A-scan_ultrasound_biometry.