Read e-book online Basics of PET Imaging Physics, Chemistry, and Regulations PDF

By Gopal B. Saha

ISBN-10: 0387213074

ISBN-13: 9780387213071

ISBN-10: 0387271287

ISBN-13: 9780387271286

This publication is a perfect textual content on puppy imaging expertise that specializes in the fundamentals, resembling physics, instrumentation, creation of puppy radionuclides and radiopharmaceuticals, and laws affecting puppy. The chapters are concise yet finished, making the subject simply comprehensible, and they're entire with experiences of pertinent uncomplicated technology and lists of steered examining. sensible tables and appendixes comprise a wealth of priceless information, reflecting the book's usefulness as a reference for nuclear drugs pros, together with physicians, citizens, and technologists. The e-book additionally merits technologists and citizens getting ready for board examinations due to its brevity and readability of content material.

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Additional resources for Basics of PET Imaging Physics, Chemistry, and Regulations

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GSO and BGO detectors and NaI(Tl) and LSO detectors have been coupled in this manner for high-resolution scanners. The latter dual detector can be used for either SPECT or PET scanning by switching between the two detectors. Photomultiplier Tube As discussed briefly earlier, a photomultiplier (PM) tube is needed to convert the light photons produced in the detector as a result of g-ray interaction to an electrical pulse. The PM tube is a vacuum glass tube containing a photocathode at one end, 10 dynodes in the middle, and an anode at the other end, as shown in Figure 2-1.

7. The number of BGO or LSO detectors in common PET scanners is of the order of (a) tens of; (b) thousands of; (c) hundreds of; (d) only a few detectors. 8. The number of rings in commercial PET scanners varies from (a) 50 to 100; (b) 5 to 10; (c) 18 to 32; (d) 1 to 5. 9. Explain how SPECT scintillation cameras can be used in coincidence counting. Discuss the advantages and disadvantages of these cameras in coincidence counting. 10. Why is PET/CT better than only PET in detecting various tumors?

Such counting is called the 2-dimensional (2-D) mode of data acquisition. In this mode, most of the random and scattered 511 keV photons from outside the ring are prevented by the septa to reach the detectors, leaving the true coincidences to be recorded (Figure 3-4A). The use of septa reduces the fraction of scattered photons from 30% to 40% without septa to 10% to 15%. Detector pairs connected in coincidence in the same ring give the direct plane event. To improve sensitivity in 2-D acquisition, detector pairs in two adjacent rings are connected in a coincidence circuit (Figure 3-4A).

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Basics of PET Imaging Physics, Chemistry, and Regulations by Gopal B. Saha

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