Projection Geometry

2014 ◽  
pp. 84-90
Keyword(s):  
Projection Geometry

Projection Geometry and Stress-Reduction Techniques in Craniofacial Surgery

1989 ◽  
Vol 83 (2) ◽  
pp. 226-227
Author(s):  
Philip Martin Hendel ◽  
Joseph M. Nadell ◽  
I. R. Munro
Keyword(s):  
Stress Reduction ◽  
Craniofacial Surgery ◽  
Reduction Techniques ◽  
Projection Geometry

Crestal Alveolar Bone Change in Patients with Periodontitis as Observed by Subtraction Radiography: An Overview

1988 ◽  
Vol 2 (2) ◽  
pp. 378-381 ◽  
Author(s):  
E. Hausmann ◽  
R. Dunford ◽  
L. Christersson ◽  
K. Allen ◽  
U. Wikesjo
Keyword(s):  
Bone Loss ◽  
Surgical Therapy ◽  
Alveolar Bone ◽  
Periodontal Therapy ◽  
Bone Change ◽  
Stent System ◽  
Highly Sensitive ◽  
Bone Changes ◽  
Projection Geometry ◽  
Available Technology

Subtraction radiography is a highly sensitive and useful technique for detecting crestal alveolar bone changes in patients. Utilizing this technique, researchers have demonstrated that 9% of crestal sites lose bone over a six-month period in untreated subjects with periodontitis. On the order of 10-13% of crestal sites were found to lose bone three months post-periodontal therapy which included surgery. Non-surgical therapy resulted in 0.5-2% of crestal sites with bone loss. Subtraction requires radiographs which have closely approximating projection geometry. Presently available technology for taking standardized radiographs based on an occlusal stent system is adequate for obtaining interpretable subtraction images.

Pixel-pyramid model for divergent projection geometry

2005 ◽  
Vol 44 (2) ◽  
pp. 027002 ◽  
Author(s):  
Zikuan Chen
Keyword(s):  
Pyramid Model ◽  
Projection Geometry

scholarly journals High-resolution differential phase contrast imaging using a magnifying projection geometry with a microfocus x-ray source

2007 ◽  
Vol 90 (22) ◽  
pp. 224101 ◽  
Author(s):  
Martin Engelhardt ◽  
Joachim Baumann ◽  
Manfred Schuster ◽  
Christian Kottler ◽  
Franz Pfeiffer ◽  
...  
Keyword(s):  
High Resolution ◽  
Phase Contrast ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray ◽  
Differential Phase ◽  
Projection Geometry ◽  
Differential Phase Contrast

The projection geometry of the field-ion image

1978 ◽  
Vol 75 (1) ◽  
pp. 129-140 ◽  
Author(s):  
H.N. Southworth ◽  
J.M. Walls
Keyword(s):  
Projection Geometry
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