scholarly journals Real-time intraoperative 3D image intensifier-based navigation in reversed shoulder arthroplasty- analyses of image quality

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Jan Theopold ◽  
Philipp Pieroh ◽  
Ralf Henkelmann ◽  
Georg Osterhoff ◽  
Pierre Hepp
Keyword(s):  
Image Quality ◽  
Real Time ◽  
Shoulder Arthroplasty ◽  
Image Intensifier ◽  
3D Image ◽  
Reversed Shoulder Arthroplasty

Ultralow Dose CT Imaging for Navigated Skull Base Surgery Using ASIR and MBIR-2D and 3D Image Quality

2014 ◽  
Vol 75 (S 02) ◽  
Author(s):  
Gerlig Widmann ◽  
P. Schullian ◽  
R. Hoermann ◽  
E. Gassner ◽  
H. Riechelmann ◽  
...  
Keyword(s):  
Image Quality ◽  
Skull Base ◽  
Skull Base Surgery ◽  
Ct Imaging ◽  
3D Image ◽  
Ultralow Dose ◽  
2D And 3D

Absorbed dose and image quality in examinations of the colon with digital and analogue techniques

1997 ◽  
Vol 38 (6) ◽  
pp. 1010-1014 ◽  
Author(s):  
J. Persliden ◽  
P. Larsson ◽  
B. Norén ◽  
S. Wirell
Keyword(s):  
Image Quality ◽  
Absorbed Dose ◽  
Image Intensifier ◽  
Incident Radiation ◽  
Conventional Technique ◽  
Digital System ◽  
Digital Technique ◽  
Significant Difference ◽  
Total Examination Time ◽  
Area Product

Purpose: Image quality and the absorbed dose to the patient are issues of primary interest in the change-over from the conventional analogue technique to the digital technique in the examination of the colon by means of fluoroscopy. the aim of this study was to compare the incident radiation and to evaluate the image quality in two different X-ray equipment types, one digital and one analogue Material and Methods: A kerma-area product meter was used to measure the incident radiation to the patient. Both fluoroscopy and total-examination times were measured as was the number of images. an evaluation of image quality was made and statistically analysed Results and Conclusion: No significant difference in the irradiation dose was observed between the two techniques. the fluoroscopy time was significantly lower with the conventional technique but the total-examination time decreased by 18% with the digital technique. the total number of images taken was higher with the digital technique (25 images compared to 19) owing to the limited field of the image intensifier. Significantly more noise and less sharpness were observed with the digital system but there was no significant difference in contrast or image quality in the various anatomical structures. Although the change-over to the digital system produced a reduction in sharpness and an increase in noise, and no significant dose saving was measured, the digital system was faster to work with and could well be used for diagnostic purposes

Transthoracic examination

2020 ◽  
pp. 71-126
Keyword(s):  
Image Quality ◽  
Inferior Vena Cava ◽  
Right Ventricle ◽  
Abdominal Aorta ◽  
Image Acquisition ◽  
Vena Cava ◽  
Short Axis ◽  
3D Image ◽  
Chamber View ◽  
Axis View

This chapter covers all aspects of transthoracic examination, including patient information, preparing machine and probe, probe handling and image quality, 2D image acquisition, 3D image acquisition, multiplane image acquisition, data acquisition, parasternal long axis view, parasternal right ventricle inflow view, parasternal right ventricle outflow view, parasternal short axis (aortic) view, parasternal short axis (mitral) view, parasternal short axis (ventricle) views, parasternal 3D views, apical 4-chamber view, apical 5-chamber view, apical 2-chamber view, apical 3-chamber view, apical 3D views, subcostal views, inferior vena cava view, abdominal aorta view, suprasternal view, right parasternal view, and standard examination.

Real Time Synchrotron Topography Using a CID Array Camera with Digital Image Acquisition and Processing

1994 ◽  
Vol 38 ◽  
pp. 215-219
Author(s):  
John M. Winter ◽  
Robert E. Green
Keyword(s):  
Real Time ◽  
Image Intensifier ◽  
Time System ◽  
Real Time System ◽  
X Ray ◽  
System A ◽  
Processing Software ◽  
Beam Transmission ◽  
Array Camera ◽  
Computer Board

Synchrotron white beam transmission topography of GaAs as previously reported by the authors relied on scanning specimen and film synchronously through the incident x-ray beam to record transmission topographic images en film. Sometimes the total dose required for reasonable contrast on film carried with it enough thermal deposition to cause elastic warping of the wafer. To escape these problems, a real time system was assembled. This system included an image intensifier, a solid state camera, a computer board to frame-grab and digitize images, and appropriate image processing software. With this system, a three inch specimen was scanned from edge to edge in one minute. At this scan rate, the incident x-ray beam had to be significantly attenuated to avoid saturating the intensifier output.

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