A clinical evaluation of some factors affecting image quality in panoramic radiography

1999 ◽  
Vol 29 (2) ◽  
pp. 81-84 ◽  
Author(s):  
G Kaeppler ◽  
D Axmann-Krcmar ◽  
I Reuter ◽  
J Meyle ◽  
G Gómez-Román
Keyword(s):  
Image Quality ◽  
Clinical Evaluation ◽  
Panoramic Radiography ◽  
Factors Affecting

scholarly journals Clinical Evaluation of Dose Reduction on Image Quality of Panoramic Radiographs

2008 ◽  
Vol 9 (5) ◽  
pp. 34-41 ◽  
Author(s):  
Meryem Toraman Alkurt ◽  
Likay Peker ◽  
Gülten Usalan ◽  
Bülent Altunkaynak
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Clinical Evaluation ◽  
Panoramic Radiography ◽  
Panoramic Radiographs ◽  
Tube Current ◽  
Digital Panoramic Radiography ◽  
Significant Difference ◽  
Panoramic Images

Abstract Aim The purpose of this study was to evaluate the effect of tube current reduction on image quality using medium and regular intensifying screens as well as a digital system for panoramic radiography. Methods and Materials A total of 150 panoramic images of 75 patients were obtained in the study. The initial images were taken at standard exposure settings, and secondary images were exposed with the tube current reduced at different rates. Results There was no statistically significant difference (p>0.05) between the two exposures for Group 3 (the rate of dose reduction 25%) while a statistically significant difference (p<0.05) was found in Group 4 (the rate of dose reduction 50%) using medium intensifying screens for all observers. No statistically significant difference was found between the two exposures on digital panoramic images. Conclusion According to the results of this study a dose reduction of 25% was achieved for medium intensifying screens and for digital panoramic images without any loss of image quality. Clinical Significance A substantial reduction in radiation exposure can be achieved in conventional panoramic radiography using a medium intensifying screen and in digital panoramic radiography without any loss of image quality needed for radiological evaluation of anatomical structures and pathological conditions. Citation Alkurt MT, Peker I, Usalan G, Altunkaynak B. Clinical Evaluation of Dose Reduction on Image Quality of Panoramic Radiographs. J Contemp Dent Pract 2008 July; (9)5:034-041.

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Organ doses and subjective image quality of indirect digital panoramic radiography

2001 ◽  
Vol 30 (6) ◽  
pp. 308-313 ◽  
Author(s):  
F Gijbels ◽  
G Sanderink ◽  
C Bou Serhal ◽  
H Pauwels ◽  
R Jacobs
Keyword(s):  
Image Quality ◽  
Panoramic Radiography ◽  
Organ Doses ◽  
Subjective Image Quality ◽  
Digital Panoramic Radiography

The subjective image quality of direct digital and conventional panoramic radiography

2000 ◽  
Vol 4 (3) ◽  
pp. 162-167 ◽  
Author(s):  
F. Gijbels ◽  
A.-M. De Meyer ◽  
C. Bou Serhal ◽  
C. Van den Bossche ◽  
J. Declerck ◽  
...  
Keyword(s):  
Image Quality ◽  
Panoramic Radiography ◽  
Subjective Image Quality

On-line portal imaging: Image quality defining parameters for pelvic fields—a clinical evaluation

1993 ◽  
Vol 27 (4) ◽  
pp. 945-952 ◽  
Author(s):  
D. Verellen ◽  
W. De Neve ◽  
F. Van den Heuvel ◽  
M. Coghe ◽  
O. Louis ◽  
...  
Keyword(s):  
Image Quality ◽  
Clinical Evaluation ◽  
Portal Imaging ◽  
On Line

Factors affecting image quality

Get Through ◽  
2020 ◽  
pp. 39-55
Author(s):  
Damian Tolan ◽  
Rachel Hyland ◽  
Christopher Taylor ◽  
Arnold Cowen
Keyword(s):  
Image Quality ◽  
Factors Affecting

Factors affecting computed tomography image quality for assessment of mechanical aortic valves

2015 ◽  
Vol 32 (S1) ◽  
pp. 63-71 ◽  
Author(s):  
Young Joo Suh ◽  
Young Jin Kim ◽  
Yoo Jin Hong ◽  
Hye-Jeong Lee ◽  
Jin Hur ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Aortic Valves ◽  
Factors Affecting ◽  
Tomography Image ◽  
Computed Tomography Image

Comparison of Intra- and Postoperative 3-Dimensional Digital Subtraction Angiography in Evaluation of the Surgical Result After Intracranial Aneurysm Treatment

Neurosurgery ◽  
2019 ◽  
Vol 87 (4) ◽  
pp. 689-696 ◽  
Author(s):  
Serge Marbacher ◽  
Jenny C Kienzler ◽  
Itai Mendelowitsch ◽  
Donato D’Alonzo ◽  
Lukas Andereggen ◽  
...  
Keyword(s):  
Image Quality ◽  
Intracranial Aneurysm ◽  
Digital Subtraction Angiography ◽  
Three Dimensional ◽  
Standard Of Care ◽  
Digital Subtraction ◽  
Factors Affecting ◽  
Imaging Quality ◽  
3 Dimensional ◽  
Surgical Result

Abstract BACKGROUND Postoperative three-dimensional digital subtraction angiography (3D-DSA) is the gold standard in evaluating intracranial aneurysm (IA) remnants after clipping. Should intraoperative 3D-DSA image quality be equally good as postoperative 3D-DSA, it could supplant the latter as standard of care for follow-up of clipped IA. OBJECTIVE To directly compare the quality of assessment of clipped IA by intraoperative and postoperative 3D-DSA. METHODS From a prospective cohort of 221 consecutive patients who underwent craniotomy for IA treatment in a hybrid operating room, we retrospectively studied 26 patients who had both intraoperative and postoperative 3D-DSA imaging of their clipped aneurysm. Comparison of intraoperative and postoperative 3D-DSA images (blinded for review) included parameters that affected image quality and differences between the 2 periods. RESULTS In the 26 patients with 32 clipped IAs, the mean interval was 11 ± 7 mo between intraoperative and postoperative imaging 3D-DSA examinations. Reconstruction with multiple clips was used in 14 (44%) cases. Of 15 remnants, 9 (60%) were small (&lt;2 mm). In comparing intraoperative and postoperative 3D-DSA, no discordance or discrepancy in assessment of the surgical result was noted for any clipped IA, and overall imaging quality was excellent for both modalities. Factors affecting minor differences in image quality were not identified. CONCLUSION Compared with postoperative 3D-DSA, intraoperative 3D-DSA images achieved equally high quality and effective, immediate interpretation of the surgical clipping result. With comparable imaging quality and no discordant findings, intraoperative 3D-DSA could replace postoperative 3D-DSA to become the standard of care in IA surgery.

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