Tissue Harmonic Imaging-Notes
Tissue harmonic imaging (THI) is a sonographic technique that can potentially provide images of higher quality than can conventional sonographic techniques.. Harmonics are frequcncies that occur at multiples of the fundamental or transmitted sonographic frequency. In conventional gray-scale sonography, the same frequency spectrum that is transmitted into the patient is subsequently received to produce the sonographic image. In THI sonography, higher harmonic frequencies generated by propagation of the ultrasound beam through tissue are used to produce the sonogram .Imaging using harmonic frequencies offers several potential advantages, including improved lateral resolution, reduced side-lobe artifacts, and improved signal-to
noise ratio.
Tissue Harmonic Imaging-Notes
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Reviewed by Sumer Sethi
on
Tuesday, June 25, 2013
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Sumer Sethi
Unique blend of academic excellence and entrepreneurship, heading leading firms in India- Teleradiology Providers, pioneering company providing teleradiology services and DAMS (Delhi Academy of Medical Sciences) Premier test preparation institute in India for MD/MS/MCI preparation. He has also been an invited faculty member at various conferences, including Teleradiology in IRIA 2008 and 2011, Hospital Build Middle East, Congress of the Brain Tumor Radiology in Neuro-oncology Society. Dr. Sethi is Editor-in-Chief of Internet Journal of Radiology. He has a keen interest in Web 2.0 technologies and in maintaining his famous radiology blog, which has been featured in multiple international journals.
1 comment:
In present technology, 2nd harmonic (i.e 2 x transmited freq) is used for image display. This is because subsequent harmonics are of decreasing amplitudes.
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