By Nicusor Iftimia, William R. Brugge, Daniel X. Hammer

ISBN-10: 0470619090

ISBN-13: 9780470619094

This e-book presents scholars, lecturers, researchers and clinicians with a powerful and validated resource of data on complicated optical applied sciences that exhibit actual promise of being translated to medical use.

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Extra info for Advances in Optical Imaging for Clinical Medicine (Wiley Series in Biomedical Engineering and Multi-Disciplinary Integrated Systems)

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The prescribed dose is usually in the range 180 to 200 cGy per fraction. Another treatment technique, called stereotactic radiosurgery, used initially only for brain lesions, has been expanded to treat extracranial tumors. This technique uses mostly a 6-MeV photon beam. The treatment is delivered in only a few fractions (1 to 5), with a high dose per fraction (6 to 20 Gy) and a high dose rate (6 to 10 Gy/min). Also, protons and heavy ions can be used for radiotherapy treatments, but these techniques are not yet in widespread use [15].

The majority of MR images today are created by either the two-dimensional Fourier transform (2DFT) technique with slice selection or by the three-dimensional Fourier transform (3DFT) technique. Medical Applications In MR T1 -weighted images of the brain, the nerve connections of white matter appear white and the congregations of neurons of gray matter appear gray, while cerebrospinal fluid appears dark. The contrast of white matter, gray matter, and cerebrospinal fluid is reversed using T2 or T2∗ imaging.

If the US frequency increases, the wavelength decreases, so the beamwidth and pulse duration decrease; consequently, the US axial and lateral resolutions, assessed by the minimum separation of two point targets when their images could just be distinguished, improve. Axial resolution is the minimum separation between two interfaces located parallel to the beam so that they can be imaged as two different interfaces. Lateral resolution is the minimum separation of two interfaces aligned along a direction perpendicular to the ultrasound beam.

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Advances in Optical Imaging for Clinical Medicine (Wiley Series in Biomedical Engineering and Multi-Disciplinary Integrated Systems) by Nicusor Iftimia, William R. Brugge, Daniel X. Hammer

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