Download Molecular Anatomic Imaging: PET-CT and SPECT-CT Integrated by Gustav K. von Schulthess MD PhD PDF
By Gustav K. von Schulthess MD PhD
This totally up to date moment variation is ideal for clinicians, because it focuses sharply on medical PET-CT and SPECT-CT examinations, omitting long physics discussions. The publication is now strictly disorder orientated and integrates PET-CT and SPECT-CT functions thoroughly. whilst either strategies are correct for a disorder, they're mentioned jointly; while just one is correct, it truly is mentioned on my own. greater than 1,200 illustrations rfile using built-in imaging and supply very necessary reference fabric for analyzing built-in imaging studies.
A bound-in DVD comprises over eighty situations to be seen in 3 orthogonal planes and various CT home windows prepared as reference and self-assessment records. The instances offer very good education and self-assessment fabric. Readers can use the DVD to augment the book's illustrations or to check their skills in making diagnoses on their own.
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Additional resources for Molecular Anatomic Imaging: PET-CT and SPECT-CT Integrated Modality Imaging
Coincidence logic links the detector with the set of opposing detectors in the fan. Coincidence fans are shown for two of the detectors in the ring. try. A: 2-D acquisition. Tungsten septa stop photons traveling at oblique angles. Coincidences between neighboring rings are accepted to increase sensitivity and define cross slices. B: For the 3-D acquisition mode, the septa are retracted, and coincidences allowed for large axial acceptance angles. qxd 8/24/06 8:40 PM Page 19 quark4 27C:GRBQ152/Von:Chapters:Ch-03: Techbooks [PPG-Quark] Chapter 3: Basics of PET Scanning incident at angles larger than those of the cross planes are largely absorbed by the septa, reducing the singles rate on the detectors.
19 oncology studies are still acquired in 2-D, even with the reduced sensitivity. A performance evaluation of the GE Advance scanner operated in 3-D showed that the in-plane resolution was the same as that in 2-D for the central part of the axial FOV, degrading by approximately 10% in the end sections (3). The axial resolution in 3-D degraded by approximately 20% compared with that in 2-D, owing to the increased axial length of the crystals compared with the in-plane dimension. The development of the 3-D method also required more complex procedures for detector normalization and attenuation correction (4).
This procedure is typically performed by imaging in the scanner a uniform cylinder containing a known activity concentration. The concentration is determined from aliquots of known volume extracted from the phantom. The mean value in a region of interest defined on the images of the cylinder can then be related to the actual concentration (in Becquerels per milliliter) to yield the scanner calibration factor. Multiplication of the image pixel values by this factor converts the values to units of absolute activity concentration.