Temporal subtraction in chest radiography: Mutual information as a measure of image quality

2009 ◽  
Vol 36 (12) ◽  
pp. 5675-5682 ◽  
Author(s):  
Samuel G. Armato ◽  
William F. Sensakovic ◽  
Samantha J. Passen ◽  
Roger Engelmann ◽  
Heber MacMahon
Keyword(s):  
Image Quality ◽  
Mutual Information ◽  
Chest Radiography ◽  
Temporal Subtraction

A Mutual-Information-Based Global Matching Method for Chest-Radiography Temporal Subtraction

2012 ◽  
Vol 16 (7) ◽  
pp. 841-850
Author(s):  
Qian Yu ◽  
◽  
Lifeng He ◽  
Tsuyoshi Nakamura ◽  
Yuyan Chao ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Mutual Information ◽  
Chest Radiography ◽  
Pathological Changes ◽  
Matching Method ◽  
Edge Image ◽  
Temporal Subtraction ◽  
Global Matching ◽  
Temporal Subtraction Image ◽  
Subtraction Image

Lung cancer is the most common cancer in the world. Early detection is most important for reducing death due to lung cancer. Chest radiography has been widely and frequently used for the detection and diagnosis of lung cancer. To assess pathological changes in chest radiographs, radiologists often compare the previous chest radiograph and the current one from the same patient at different times. A temporal subtraction image, which is constructed from the previous and current radiographs, is often used to support this comparison work. This paper presents a Mutual-Information (MI)-based global matching method for chest-radiography temporal subtraction. We first make a preliminary transformation on the previous radiograph to make the center line of the lungs in the previous radiograph coincide with that of the current one. Then, we specify areas of the lungs to be used for mutual information registration and extract rib edges in these areas. We transform the rib edge image of the previous radiograph until mutual information between the rib edge image of the previous radiograph and that of the current radiograph becomes maximal. Finally, we use the same transform parameters to transform the previous radiograph, and then use the current radiograph and the transformed previous radiograph to construct the temporal subtraction image. The experimental result demonstrates that our proposed method can enhance pathological changes and reduces misregistration artifacts.

Chest Radiography with a Flat-Panel Detector: Image Quality with Dose Reduction after Copper Filtration

Radiology ◽  
2005 ◽  
Vol 237 (2) ◽  
pp. 691-700 ◽  
Author(s):  
Okka W. Hamer ◽  
Claude B. Sirlin ◽  
Michael Strotzer ◽  
Ingitha Borisch ◽  
Niels Zorger ◽  
...  
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Chest Radiography ◽  
Flat Panel ◽  
Flat Panel Detector

Image Quality in Chest Radiography

2004 ◽  
Vol 87 (1) ◽  
pp. 92-93
Author(s):  
Anthony B. Wolbarst
Keyword(s):  
Image Quality ◽  
Chest Radiography

AMBER and conventional chest radiography: comparison of radiation dose and image quality.

Radiology ◽  
1992 ◽  
Vol 185 (3) ◽  
pp. 719-723 ◽  
Author(s):  
J Geleijns ◽  
J J Broerse ◽  
H W Julius ◽  
H A Vrooman ◽  
J Zoetelief ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Chest Radiography

Dose reduction in digital chest radiography and perceived image quality

2007 ◽  
Vol 80 (960) ◽  
pp. 984-988 ◽  
Author(s):  
L J M Kroft ◽  
W J H Veldkamp ◽  
B J A Mertens ◽  
J-P A van Delft ◽  
J Geleijns
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Chest Radiography ◽  
Digital Chest
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