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Remote Sensing ,[object Object],[object Object],[object Object],[object Object]
1. X-rays ,[object Object],[object Object],[object Object],[object Object]
Production of X-rays ,[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
Main features of X-ray tube
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
Use of X-ray in imaging ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
Factors in the design of the X-ray that may affect sharpness ,[object Object],[object Object],[object Object]
The area of target anode ,[object Object],[object Object]
The size of the aperture ,[object Object],[object Object]
Use of lead grid ,[object Object]
[object Object],[object Object],[object Object]
Solve problems using equation  I  =  I 0 e – µ x  ,[object Object],[object Object],[object Object],[object Object]
 
[object Object],[object Object],[object Object]
2 . Computed Tomography scanning ,[object Object],[object Object],[object Object]
Purpose of CT Scanning ,[object Object],[object Object],[object Object]
[object Object]
[object Object],[object Object],[object Object],[object Object]
Suppose a section consists of four voxels with intensities as below. The number on each voxel is the pixel intensity that is to be reproduced
If a beam of X-rays is directed from the   left, then detectors will give readings of 5 and 9 This allows the four voxels to be reconstructed
The X-ray tube and detectors are now rotated through 45 o
The procedure is repeated and the X-ray tube and detectors rotated a further 45 o
Final images are taken after rotating a further 45 o
In order to obtain the original pattern of pixels, two operations must be performed ,[object Object],[object Object]
[object Object]
[object Object],[object Object]
Generation and detection of ultrasonic waves using piezo-electric transducers ,[object Object],[object Object]
[object Object],[object Object]
[object Object]
[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
 
How it can be used as receiver ,[object Object],[object Object],[object Object]
Main principles behind the use of ultrasound ,[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object]
Some approximate values of specific acoustic impedance Z
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
Values for ultrasound of frequency 1MHz
A-scan ,[object Object],[object Object],[object Object],[object Object]
Example of A-scan
B-scan ,[object Object],[object Object]
Advantage of Ultrasonic wave ,[object Object],[object Object],[object Object]
Principle behind the use of magnetic resonance  ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object]
[object Object],[object Object],[object Object],[object Object]

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Remote sensing

  • 1.
  • 2.
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  • 4.
  • 5.
  • 6. Main features of X-ray tube
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17.  
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23. Suppose a section consists of four voxels with intensities as below. The number on each voxel is the pixel intensity that is to be reproduced
  • 24. If a beam of X-rays is directed from the left, then detectors will give readings of 5 and 9 This allows the four voxels to be reconstructed
  • 25. The X-ray tube and detectors are now rotated through 45 o
  • 26. The procedure is repeated and the X-ray tube and detectors rotated a further 45 o
  • 27. Final images are taken after rotating a further 45 o
  • 28.
  • 29.
  • 30.
  • 31.
  • 32.
  • 33.
  • 34.
  • 35.
  • 36.  
  • 37.
  • 38.
  • 39.
  • 40.
  • 41. Some approximate values of specific acoustic impedance Z
  • 42.
  • 43.
  • 44.
  • 45. Values for ultrasound of frequency 1MHz
  • 46.
  • 48.
  • 49.
  • 50.
  • 51.
  • 52.
  • 53.