X-ray computed tomography - Wikipedia, the free encyclopedia CT scanning of the head is typically used to detect infarction, tumors, calcifications, haemorrhage and bone trauma. Of the above, hypodense (dark) structures can indicate edema and infarction, hyperdense (bright) structures indicate calcifications and ha
Purchasing a cardiac CT scanner: What the radiologist needs to know UKRC 2010 What do you need on a cardiac scanner? • High temporal resolution to ‘freeze’ cardiac motion • Good 3-D spatial resolution to image narrow, tortuous arteries • Fast volume coverage to minimise breathing and misregistration artefacts • High dose
CT and Radiation: What Radiologists Should Know: Scanner-based CT Radiation Dose Estimation As defined by the Food and Drug Administration (FDA) in 1984, the original incarnation of the CTDI was based on an axial CT scanner. [4] This original definition of CTDI represented the dose from the primary beam plus scatter from surrounding slices. Seve
Dose issues on multi-slice CT scanners - impactscan.org | ct scanner information, evaluation and adv Table 4: Detector array efficiency for the Philips Mx8000 scanner range Scanner model No. of detector banks z-axis coverage (mm) Detector array efficiency (%) 2-slice 2 20 80 4-slice 8 20 78 16-slice 24 24 75 Considerations for helical scanning Helical pi
CT Image Quality vs - Ohio University Heritage College of Osteopathic Medicine CT Image Quality- A Summary Image Noise Image noise, in its most simple definition, is measured as the standard deviation of voxel values in a homogenous (typically water) phantom. There are, of course, much more complete definitions of noise that take in
SOMATOM Force - Technical Specifications - Siemens Healthcare Global With a volume coverage speed of up to 737 mm/s, a thorax-abdomen scan can now be performed in just one second. The capabilities of the gantry and the table are not the only important factors – when scanning at ultra-high pitch, the available power is esse
Principles of CT and CT Technology Abstract This article provides a review of the basic principles of CT within the context of the evolution of CT. Modern CT technology can be understood as a natural progression of improvements and innovations in response to both engineering problems ...
www.siemens.com/radiation-oncology SOMATOM Definition AS Open 20/64 8 At every step of your radiotherapy workflow, you rely on clear image quality. As the number of CT images taken is rising in radiation oncology, saving unnecessary dose is of utmost importance. The SOMATOM Definition AS Open reduces dose to the lowest ..
Artifacts in helical CT images - Research Imaging Institute rotation), which is the number of 3600 tube rotations, also means table speed. A higher pitch results a looser helical scanning data, which will induce more inconsistency between scanning plan. From the experiment data in this paper, for a given TI, 1.0 a
Generic monitoring of scan protocols in CT Solution connect to CT console copy protocol file calculate checksum raw text diff operator contextual diff operator groundtruth storage creation of modifications timeline equals ? convert vendor specific file to textual form parse and interpret textual d
