[PDF] Top 20 Image quality based x-ray dose control in cardiac imaging
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Image quality based x-ray dose control in cardiac imaging
... closed-loop dose control system balances the radiation dose delivered to patients and the quality of images produced in cardiac x-ray imaging ...automatic ... See full document
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Comprehensive assessment of patient image quality and radiation dose in latest generation cardiac x-ray equipment for percutaneous coronary interventions
... medical imaging experts with 10, 22, and 27 years’ expe- rience viewed the angiograms on a RadiForce RX340 medical grade monitor (EIZO Corporation, Ishikawa, Japan) ∼70 cm away, in a room with slightly dimmed ... See full document
7
3D Cardiac microvessels embolization imaging based on X-ray phase contrast imaging
... the imaging test. The phase contrast image of the heart is shown in Figure ...of cardiac microvessels, depicting the 3D architecture of the ves- sels is real challenging, if we only imagine it from ... See full document
9
Antero posterior (AP) pelvis x ray imaging on a trolley : impact of trolley design, mattress design and radiographer practice on image quality and radiation dose
... statistical difference identified between CNR and the two variables discussed (mattresses and platform position) also suggests that observer assessment may be influenced by something other than contrast and noise. This ... See full document
16
Diagnostic X-Ray Machines Quality Control Parameters Analysis in Some Major Hospitals in Benue State-Nigeria
... appropriate quality control (QC) measures for X-ray machines in place, the benefits of reduced dose to the patient and early diagnosis will not be ...realized. Quality ... See full document
7
Diagnostic X-Ray Machines Quality Control Parameters Analysis In Some Major Hospitals In Benue State-Nigeria
... Quality control in diagnostic radiology is essential to ensuring accurate diagnostic information at optimal radiation doses (Sonawane et ...many X-ray machines are installed and commissioned, ... See full document
9
An apodized-aperture x-ray detector design for improved image quality in mammography
... New x-ray detector designs have been developed to overcome some limitations of conventional ...low-dose x-ray imaging when a conventional detector might not produce enough ... See full document
227
Radiation dose and image quality optimisation in medical imaging
... several imaging modalities that provide varying levels of information on the location, size and shape of the ...requesting imaging. Ultrasound gives no ionising radiation dose but there is a lack of ... See full document
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AP pelvis x ray imaging on a trolley: the impact of trolley design, mattress design and radiographer practices on image quality and radiation dose
... most imaging departments use digital imaging systems as opposed to film/screen whether this is CR or ...digital imaging that make it preferable to film/screen technology, such as the ability for ... See full document
240
Impact of latest generation cardiac interventional X-ray equipment on patient image quality and radiation dose for trans-catheter aortic valve implantations
... exposure (39,40). Cardiologists may begin clinical practice as young as their early thirties (41), increasing the risk of cancer during their lifetime. Women are at slightly higher risk than men (11), and the number of ... See full document
21
Determining The Detective Quantum Efficiency (DQE) Of X-Ray Detectors In Clinical Environments
... radiation dose to the general ...diagnostic x-ray imaging without use of higher radiation exposures requires knowledge and understanding of the detective quantum efficiency ...clinical ... See full document
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How much noise can be added in cardiac X-ray imaging without loss in perceived image quality?
... patient image repeatedly with varying dose levels, computer-generated quantum noise was added to patient images to simulate dose ...patient image, a collection of that image ... See full document
7
How much image noise can be added in cardiac x-ray imaging without loss in perceived image quality?
... low dose standard deviations were within 10% agreement and corresponding TCDD phantom images appeared the same (similar results to above), however NPS curve shapes were not well ... See full document
43
Context sensitive cardiac x-ray imaging: a machine vision approach to x-ray dose control
... agent, cardiac motion, respiratory and minor patient ...more x-ray attenuating ...individual image frames, but it is difficult to define a particular location on a vessel that might be ... See full document
27
Machine vision image quality measurement in cardiac x-ray imaging
... of x-ray image contrast of coronary arteries filled with iodine contrast media during interventional cardiac ...direction image of the cardiac scene derived using a Frangi ... See full document
7
AP versus PA positioning in lumbar spine computed radiography : Image quality and individual organ doses
... university imaging department using a Wolverson Acroma X- Ray unit (Wolverson X-ray Ltd, Willenhall, UK) with a Varian 130 HS X-ray tube (Varian Medical Systems, Palo ... See full document
32
Understanding automated dose control in dynamic X-ray imaging systems
... The X- anode introduces two main limits related to heating of the focal track and the heat capacity and rate of cooling of the anode ...higher X-ray output operating modes, i.e. cardiac ... See full document
12
Does the use of additional X-ray beam filtration during cine acquisition reduce clinical image quality and effective dose in cardiac interventional imaging?
... 10 the standard and filtered sequences displayed side-by-side with software written in Matlab 2008a (The Mathworks, Inc, Natick, USA). This software truncated the longer of the original sequences to the length of its ... See full document
29
Analysis of Wavelet-based Transform Compression Techniques on Medical Image
... This Wavelet coding technique was introduced by Shapiro [17] as a quantization and coding strategy based on discrete wavelet transform characteristics for image compression. It is designed to attain an ... See full document
5
Ludwig, Wolfgang (2001): Development and Applications of Synchrotron Radiation Microtomography. Dissertation, LMU München: Fakultät für Physik
... is based on a monochromatic high energy X-ray beam (50 - 80 keV) and a 2-dimensional ...projected image of the corresponding diffracting grains in the observed ...the image acquired at ... See full document
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