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A1984TE35100001
A1984TE35100001

... studies were performed with a primitive rectilinear scanner jury-rigged from commercial and homemade parts put together by an engineer, James Mozley, in a small 12’ x 13’ room in the radiology department of Johns Hopkins Hospital. My associate, Henry Wagner, performed many of these studies alone at ...
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... There was consensus between the two neuroradiologists over whether DAI is present or not in 68/89 (76 %). In the control group 4/11 patients had findings, all of which were WM hyperintensities. A patient with 16 WM hyperintensities was reported by R2 as DAI being possible, all others were reported a ...
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Full file at http://collegetestbank.eu/Test-Bank-Essentials-of

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... this is currently under debate. In fact, some investigators have found that low-grade lymphomas are able to take up 67Ga. For these reasons a 67Ga scan is necessary before therapy in untreated patients in order to evaluate whether lymphoma is 67Ga avid or not. If the 67Ga scan is negative, it should ...
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Image-guided radiation therapy

Image-guided radiation therapy (IGRT) is the process of frequent two and three-dimensional imaging, during a course of radiation treatment, used to direct radiation therapy utilizing the imaging coordinates of the actual radiation treatment plan. The patient is localized in the treatment room in the same position as planned from the reference imaging dataset. An example of IGRT would include localization of a cone beam computed tomography (CBCT) dataset with the planning computed tomography (CT) dataset from planning. IGRT would also include matching planar kilovoltage (kV) radiographs or megavoltage (MV) images with digital reconstructed radiographs (DRRs) from the planning CT. These two methods comprise the bulk of IGRT strategies currently employed circa 2013.This process is distinct from the use of imaging to delineate targets and organs in the planning process of radiation therapy. However, there is clearly a connection between the imaging processes as IGRT relies directly on the imaging modalities from planning as the reference coordinates for localizing the patient. The variety of medical imaging technologies used in planning includes x-ray computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET) among others. The precision of IGRT is significantly improved when N-localizer technology is used in conjunction with these medical imaging technologies. Through advancements in imaging technology, combined with a further understanding of human biology at the molecular level, the impact of IGRT on radiotherapy treatment continues to evolve.
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