By Nicusor Iftimia, William R. Brugge, Daniel X. Hammer
This ebook offers scholars, academics, researchers and clinicians with a powerful and demonstrated resource of knowledge on complex optical applied sciences that exhibit actual promise of being translated to scientific use.
Read or Download Advances in Optical Imaging for Clinical Medicine (Wiley Series in Biomedical Engineering and Multi-Disciplinary Integrated Systems) PDF
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Additional info for Advances in Optical Imaging for Clinical Medicine (Wiley Series in Biomedical Engineering and Multi-Disciplinary Integrated Systems)
The earliest sensors were scintillation detectors, with photomultiplier tubes excited by sodium iodide crystals. Modern detectors are ﬁlled with low-pressure xenon gas. Many data scans are taken progressively as the object is passed gradually through the gantry. The scans are combined by tomographic reconstruction. Data are arranged in a matrix in memory, and each data point is convolved with its neighbors using the fast Fourier transform technique. Using a backprojection method, the acquisition geometry is reversed and the results are stored in memory.
In stroke). Concerns have been raised recently regarding the toxicity of gadolinium-based contrast agents and their impact on persons with impaired kidney function. , iron oxide nanoparticles) have become available . , scars, tumors) do not. , pancreas). Diamagnetic agents such as barium sulfate have also been studied for potential use in the gastrointestinal tract, but are used less frequently. The blood–brain barrier is a complex defensive mechanism that prevents many substances circulating in the bloodstream (including some germs) from invading the brain.
7 (Continued ) or HDR techniques. US images are taken to estimate the length of the uterus prior to intracavitary applicator insertion. An MR-compatible dummy insert is placed inside the intracavitary applicator and then MR images are acquired and used for treatment planning. MR images are preferred since they can better visualize soft tissues. MR-CT fusion should be used to enhance the image contrast for both soft tissue (tumor and organs of risk) and the applicators. 2 CT, MR, and PET Imaging in External Beam Radiation Therapy External beam radiation therapy is a treatment approach that has been used in the radiation oncology ﬁeld since the discovery of x-rays.