By Michael N Maisey MD, BSc, FRCP, FRCR (auth.), Dale L Bailey PhD, ARCP (London), FIPEM, MACPSEM, David W Townsend BSc, PhD, PD, Peter E Valk MB, BS, FRACP, Michael N Maisey MD, BSc, FRCP, FRCR (eds.)
Essential for college students, technological know-how and scientific graduates who are looking to comprehend the elemental technology of Positron Emission Tomography (PET), this e-book describes the physics, chemistry, know-how and assessment of the medical makes use of in the back of the technology of puppy and the imaging strategies it makes use of. in recent times, puppy has moved from high-end study imaging software utilized by the hugely really expert to an integral part of scientific assessment within the hospital, specially in melanoma administration. formerly being the world of scientists, this ebook explains puppy instrumentation, radiochemistry, puppy facts acquisition and photo formation, integration of structural and useful photos, radiation dosimetry and safeguard, and functions in devoted components equivalent to drug improvement, oncology, and gene expression imaging. The technologist, the technology, engineering or chemistry graduate looking extra distinct information regarding puppy, or the clinical complex trainee wishing to achieve perception into the elemental technology of puppy will locate this booklet important.
This publication is basically repackaged content material from the fundamental technology component of the 'big' Valk booklet on puppy. It includes new, thoroughly revised and unchanged chapters protecting the "basic sciences" component to the most booklet - overall 18 chapters:
- 2 new (chapters 1, 16)
- 8 thoroughly revised (chapters four, five, eight, thirteen, 14, 15, 17, 18)
- 3 minor corrections (chapters 2, 6, 11)
- 5 unchanged (chapters three, 7, nine, 10, 12)
Read Online or Download Positron Emission Tomography: Basic Sciences PDF
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Additional info for Positron Emission Tomography: Basic Sciences
Sample text
In comparison, for the BGO-based detectors, the lower energy gate is set at 300–400 keV, leading to a maximum deviation of more than 70o from the true line-of-response. Hence, additional scatter-correction techniques which estimate the distribution of scattered radiation are then employed in order to remove them from the image and improve image contrast. 25. Scattered and random coincidences in a PET scanner. Event 1 shows a coincident event where one of the γ rays is scattered leading to an incorrectly assigned line-of-response (LOR, dotted) for image reconstruction (scatter coincidence).
GSO is another scintillator with useful physical properties for PET detectors. One advantage of GSO over LSO, in spite of a lower stopping power and light output, is its better energy resolution and more uniform light output. Commercial systems are now being developed with GSO detectors. Finally, the extremely short decay time of BaF2 (600 psec) makes it ideal for use in time-of-flight scanners (see Time-of-flight Measurement, below), which helps to partially compensate for the low sensitivity arising due to the reduced stopping power of this scintillator.
The energy transferred does not depend on the properties of the material or its electron density (Fig. 10). 10. In Compton scattering, part of the energy of the incoming photon is transferred to an atomic electron. This electron is known as the recoil electron. The photon is deflected through an angle proportional to the amount of energy lost. , What is the energy of an annihilation photon after a single scatter through 60°? , the photon is back-scattered. A 180° back-scattered annihilation photon will have an energy of 170 keV.