Proceedings of the International School of Physics "Enrico Fermi.", Volume 76N. Zanichelli, 1981 - Nuclear physics |
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Page 14
... functions and sampling . 41. Discrete functions . - Many imaging systems do not detect a continuous input function , but produce sampled values at discrete intervals . Images are also displayed as discrete functions and , when digital ...
... functions and sampling . 41. Discrete functions . - Many imaging systems do not detect a continuous input function , but produce sampled values at discrete intervals . Images are also displayed as discrete functions and , when digital ...
Page 15
eq . ( 30 ) , the Fourier transform of the sampled function can be found by con- volving the Fourier transforms of the set of delta - functions and the continuous function . The Fourier transform of the set of delta - functions is a new ...
eq . ( 30 ) , the Fourier transform of the sampled function can be found by con- volving the Fourier transforms of the set of delta - functions and the continuous function . The Fourier transform of the set of delta - functions is a new ...
Page 476
... function [ 3 ] , which is the ratio of the output modulation to the input modulation , can be given . For such describing functions , the parameters and conditions used when the function is obtained . must be given explicitly , because ...
... function [ 3 ] , which is the ratio of the output modulation to the input modulation , can be given . For such describing functions , the parameters and conditions used when the function is obtained . must be given explicitly , because ...
Contents
A R D THORNTON | 1 |
Physicists and clinicians | 5 |
The Fourier transform properties of an image | 12 |
Copyright | |
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alveolar amplitude analysis aorta aortic approximately arterial pressure arterial system attenuation value basilar membrane beam blood flow blood pressure C₁ capillary cardiac output circulation clinical cm³ CO₂ cochlea cochlear compartment compliance components computed tomography concentration constant counting rate cross-section cuff decrease detector diameter diastolic distribution effect elastin electrode energy equation filter fluid Fourier transform frame frequency function haemoglobin hair cells halothane heart rate impulse response increase left heart linear linear-attenuation coefficient lung manometer measured medical physics membrane method mmHg muscle normal obtained oxygen P₁ P₂ pacemaker patient peripheral resistance photons physicist physiological pulmonary pulsatile pulse ratio region Rendiconti S.I.F. sample scan scanner segment shown in fig shows signal stroke volume systolic techniques tissues transducer transmural pressure tube ultrasonic V₁ velocity venous system ventilation ventricle ventricular vessel viscoelastic volume wall wave form Windkessel X-ray zero