Physics and Engineering of Radiation Detection

436 Chapter 7. Position Sensitive Detection and Imaging modulation transfer function orMTF. Fig.7.1.13 shows the shape of a typi ...

7.1. Some Important Terminologies and Quantities 437 whereνis the spatial frequency anddis the pixel size. This expression does ...

438 Chapter 7. Position Sensitive Detection and Imaging absorption efficiency is directly related to the efficiency of generatio ...

7.1. Some Important Terminologies and Quantities 439 the overall effect of not only quantum efficiency but also of resolution an ...

440 Chapter 7. Position Sensitive Detection and Imaging may lead to false results specially for low radiation environments. Unif ...

7.2. Position Sensitive Detection 441 7.2 PositionSensitiveDetection....................... 7.2.A TypesofPositionSensitiveDetect ...

442 Chapter 7. Position Sensitive Detection and Imaging Reflection Reflected Pulse Time Difference Direct Transmission Reflected ...

7.2. Position Sensitive Detection 443 Anode Wires Cathode Plane Wire Holder Cathode Plane −HV −HV Signal Out Signal Out (a) Sign ...

444 Chapter 7. Position Sensitive Detection and Imaging Cathode Plane Anode Wire Electric Field Lines Cathode Plane Figure 7.2.3 ...

7.2. Position Sensitive Detection 445 resolution can be obtained by using several chambers in succession such that the wires of ...

446 Chapter 7. Position Sensitive Detection and Imaging − − + + s=vt v Anode Wire Cathode Wires −HV −HV v Scintillation Counter ...

7.2. Position Sensitive Detection 447 Anodes Cathodes Substrate (a) Drift Plane Anodes Cathodes Drift Plane Substrate Enclosure ...

448 Chapter 7. Position Sensitive Detection and Imaging should extend up to the end of both sides. This ensures that all the cha ...

7.2. Position Sensitive Detection 449 strips. In digital mode of operation, where only binary information is recorded, the resol ...

450 Chapter 7. Position Sensitive Detection and Imaging simple double sided silicon detector. Here, the strips on both sides are ...

7.3. Imaging Devices 451 nitrate or silver halide salts. After the film has been exposed to x-rays it must go through a series o ...

452 Chapter 7. Position Sensitive Detection and Imaging 7.3.C ChargedCoupledDevices Most of the disadvantages of photographic fi ...

7.3. Imaging Devices 453 D.1 PropertiesofaDirectImagingCCD The performance of a CCD is characterized by the following properties ...

454 Chapter 7. Position Sensitive Detection and Imaging There is another quantity, which is also sometimes referred to as the qu ...

7.3. Imaging Devices 455 Solution: The maximum counts that can be recorded by a 15-bit ADC areNmax=2^15 = 32768 counts. Hence ac ...