By Fred A. Mettler Jr. MD MPH, Milton J. Guiberteau MD
Via 4 variations, this source has demonstrated itself because the top creation to nuclear imaging suggestions. it truly is sensible, but accomplished, protecting physics, instrumentation, qc, and felony specifications. The fifth version encompasses a new colour layout, with many straight forward gains equivalent to "Pearls and Pitfalls." greater than six hundred photographs in digital-quality solution depict imaging of every physique method. a sequence of Unknown Case units, with solutions, aid attempt your knowledge.Includes priceless appendices together with Injection concepts, Pediatric Dosages, Non-radioactive prescribed drugs, and lots of more.Presents very important "Pearls and Pitfalls" in each one bankruptcy. contains a new full-color layout making details effortless to learn and find.Covers new strategies similar to PET/CT, cardiac-gated SPECT, and tumor-specific radionuclides.Provides full-chapter insurance of sizzling subject matters reminiscent of Cerebrovascular approach · Cardiovascular process · traditional Neoplasm Imaging and Radioimmunotherapy · and Positron Emission Tomography Imaging.Includes seven entire Unknown Case units for self-testing.
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Extra info for Essentials of Nuclear Medicine Imaging 5th edition
Example text
The detector is capable of orbiting around a stationary patient on a special imaging table, with the camera face continually directed toward the patient. The camera head rotates around a central axis called the axis of rotation (AOR). The distance of the camera face from this central axis is referred to as the radius of rotation (ROR). The orbit may be cir cular, with a 360-degree capacity, although ellipti cal (Fig. 2-11) or body contour motions are also used. Rotational arcs of less than 360 degrees may be used, particularly for cardiac studies.
In most clinical studies, the 64 X 64 matrix may be the best compromise. Number of Views Generally, the more views obtained, the better the image resolution possible. A compromise with total imaging time must be reached, however, so that use of 64 views over a 360-degree orbit commonly pro duces adequate tomograms. Tomographic Image Production Image Reconstruction The data available in the multiple digitized images are combined and manipulated by the computer using mathematic algorithms to reconstruct a three-dimensional image of the organ scanned.
Measurement of the threshold response of the calibrator (lower sensitivity limit) is also important, particularly for 99Mo. Gamma Cameras Scintillation camera systems are subject to a variety of detector and associated electronic problems that can cause aberrations of the image and may not be detected by the casual observer. Thus, quality control procedures are especially important to ensure high-quality, accurate diagnostic images. The three parameters usually tested are (1) spatial resolution, or the ability to visualize an alternating, closely spaced pattern of activity; (2) image linear ity and distortion, or the ability to reproduce a straight line; and (3) field uniformity, or the ability of the imaging system to produce a uniform image from the entire crystal surface.