scholarly journals Development and validation of a visual grading scale for assessing image quality of AP pelvis radiographic images

2016 ◽  
Vol 89 (1061) ◽  
pp. 20150430 ◽  
Author(s):  
Hussien A A B Mraity ◽  
Andrew England ◽  
Simon Cassidy ◽  
Peter Eachus ◽  
Alejandro Dominguez ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiographic Images ◽  
Visual Grading ◽  
Grading Scale ◽  
Development And Validation

scholarly journals A comparative study on image quality of two digital intraoral sensors

2019 ◽  
Vol 48 (7) ◽  
pp. 20190063 ◽  
Author(s):  
Cinar Aziman ◽  
Kristina Hellén-Halme ◽  
Xie-Qi Shi
Keyword(s):  
Image Quality ◽  
Observer Agreement ◽  
Visual Grading ◽  
Intra Class Correlation ◽  
Subjective Image Quality ◽  
Significant Difference ◽  
General Dentists ◽  
Parallel Technique ◽  
Specialist Group

Objectives The aims of this study were to evaluate the subjective image quality and reliability of two digital sensors. In addition, the image quality of the two sensors evaluated by specialists and general dentists were compared. Methods: 30 intraoral bitewings from five patients were included in the study, 15 were exposed with a Dixi sensor (CCD-based) and 15 with a ProSensor (CMOS-based) using modified parallel technique. Three radiologists and three general dentists evaluated the images in pair. A five-point scale was used to register the image quality. Visual grading characteristics (VGC) analysis was performed to compare the image quality and the observer agreement was assessed in terms of intra class correlation co-efficient. Results No statistically significant difference was found on image quality between the sensors. The average scores of the observer agreement were moderate with an average of 0.66 and an interval of 0.30 to 0.87, suggesting that there was a large variation on preference of image quality. However, there was a statistically significant difference in terms of the area under the VGC- curves between the specialist group and the general dentist group ( p = 0.043), in which the specialist group tended to favor the ProSensor. Conclusions Subjective image quality of the two intraoral sensors were comparable when evaluated by both general and oral radiologists. However, the radiologists seemed to prefer the ProSensor to the Dixi as compared to general dentists. Inter- observer conformance showed a large variation on the preference of the image quality.

scholarly journals Influence of the incorporation of a lead foil to intraoral digital receptors on the image quality and root fracture diagnosis

2019 ◽  
Vol 48 (6) ◽  
pp. 20180369 ◽  
Author(s):  
Amanda Farias Gomes ◽  
Yuri Nejaim ◽  
Rocharles Cavalcante Fontenele ◽  
Francisco Haiter-Neto ◽  
Deborah Queiroz Freitas
Keyword(s):  
Image Quality ◽  
Control Group ◽  
Human Teeth ◽  
Radiographic Images ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Diagnostic Values ◽  
Fracture Diagnosis ◽  
Lead Foil

Objective: To evaluate the quality of images obtained with the addition of a lead foil to intraoral digital receptors. Methods: Radiographic images of 34 single-rooted human teeth - 19 with vertical root fracture (VRF) and 15 of the control group - were obtained with and without the addition of a lead foil, using the VistaScan, Express, Digora Optime and Digora Toto systems. Images were evaluated by five observers regarding the diagnosis of VRF, using a 5-point scale. In a second moment, an observer preference analysis related to the presence of the lead foil was performed. Images of an acrylic phantom were also obtained with and without the addition of a lead foil, and the quantities of uniformity, grey value and standard deviation of grey values were obtained. Results: There were no significant differences in the VRF diagnostic values, considering the presence of the lead foil. Regarding the image quality preference, the observers preferred images acquired with the lead foil for all systems tested, but with greater values for Digora Optime (61.33%) and Express (61.33%). The presence of the lead foil did influence the image uniformity in all systems tested ( p < 0.05). Moreover, the lead foil increased the mean of grey values for Digora Optime and Express images ( p < 0.05), however it did not influence the SD in any of the digital systems ( p > 0.05). Conclusion: The addition of a lead foil to intraoral digital receptors produces a positive effect in the image quality objectively detected by means of uniformity and subjective visual preference.

scholarly journals Image quality of cone beam computed tomography for evaluation of extremity fractures in the presence of metal hardware: visual grading characteristics analysis

2017 ◽  
Vol 90 (1073) ◽  
pp. 20160539 ◽  
Author(s):  
Greg M Osgood ◽  
Gaurav K Thawait ◽  
Nima Hafezi-Nejad ◽  
Delaram Shakoor ◽  
Adam Shaner ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Visual Grading ◽  
Characteristics Analysis

Image Quality in Chest Radiography: Abstract

2003 ◽  
Vol 3 (2) ◽  
pp. 13-13 ◽  
Author(s):  
C. Vyborny ◽  
P. Bunch ◽  
H. Chotas ◽  
J. Dobbins ◽  
L. Niklason ◽  
...  
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Chest Radiography ◽  
Careful Consideration ◽  
Extensive Literature ◽  
Radiographic Images ◽  
Radiographic Technique ◽  
Chest Disease ◽  
Complex Subject

Image quality in chest radiography is an important, but complex, subject. The complicated anatomy of the chest, as well as the various ways that chest disease may manifest itself, require careful consideration of radiographic technique. The manner in which human observers deal with the complexity of chest images adds further dimensions to image analysis that are not found in other radiography examinations. This report describes many issues that are related to the quality of chest radiographic images. In so doing, it relies upon the very extensive literature on this topic, a topic that has been one of the most thoroughly studied in all of radiography. Strategies that are generally agreed to improve the quality of chest radiographs are described, as are approaches to the assessment of image quality.

Assessing the Effect of Packing the Sulcus on Image Quality in Equine Digital Radiography

2019 ◽  
Vol 184 (7) ◽  
pp. 221-221
Author(s):  
Conor Rowan ◽  
Antonella Puggioni ◽  
Séamus E Hoey ◽  
John Mark O’Leary ◽  
Clodagh Kearney ◽  
...  
Keyword(s):  
Image Quality ◽  
Distal Interphalangeal Joint ◽  
Visual Grading ◽  
Diagnostic Interpretation ◽  
Oblique Projections ◽  
Visual Grading Analysis ◽  
Distal Interphalangeal ◽  
Vascular Channels ◽  
Palmar Aspect

The requirement to pack the sulcus of the equine foot as an aid to diagnostic interpretation before acquisition of dorsoproximal-palmarodistal oblique projections is debatable. The purpose of this study was to investigate the benefit of packing the sulcus in the assessment of normal anatomy. 23 cadaver limbs were radiographed in a podoblock (https://www.podoblock.com/products-page/podoblock/podoblock/). A non-packed image (NP) and a packed image (P) of the same foot were acquired. The image quality of P was graded against the reference NP by five observers, where −1=P was superior, 0=no difference between P and NP, and +1=NP was superior. Four anatomical criteria were used: the distal solar margin of the distal phalanx (DP), the vascular channels of DP, the palmar aspect of the distal interphalangeal joint and the articulation of the navicular bone with DP. A total Visual Grading Analysis Score of 0.28 indicates a preference for NP images. Packing was of benefit in only 10.8 per cent of cases. While judicious high-quality packing may be of benefit in a minority of cases, the routine packing of the sulcus in equine radiography was not found to be of benefit in the assessment of anatomical features in this study.

Development and validation of the Pectus Carinatum Body Image Quality of Life (PeCBI-QOL) questionnaire

2019 ◽  
Vol 54 (11) ◽  
pp. 2257-2260
Author(s):  
James F. Paulson ◽  
Kelsey Ellis ◽  
Robert J. Obermeyer ◽  
M. Ann Kuhn ◽  
Frazier W. Frantz ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Body Image ◽  
Image Quality ◽  
Pectus Carinatum ◽  
Development And Validation

Advance in the diagnosis of esophageal carcinoma

1998 ◽  
Vol 39 (1) ◽  
pp. 47-51 ◽  
Author(s):  
T. Ueyama ◽  
K. Kawamoto ◽  
Y. Yamada ◽  
H. Yoshikawa ◽  
K. Masuda
Keyword(s):  
Image Quality ◽  
Esophageal Carcinoma ◽  
Surface Structure ◽  
Clinical Utility ◽  
Double Contrast ◽  
Radiographic Images ◽  
Optimal Values ◽  
The Mean ◽  
Esophageal Carcinomas

Purpose: to assess the clinical utility of computed radiographic images processed with adaptive spatial filtering (ASF) in the diagnosis of esophageal carcinoma Material and Methods: After determining the optimal values for ASF image parameters in double-contrast barium studies, we used ASF to process the esophagograms of 35 patients with 37 esophageal carcinomas (superficial 20, advanced 17). the image quality of each lesion was evaluated independently by four radiologists on the basis of detectability, extent, and surface structure. the scoring was: 1 when the ASF image was superior to the original; — 1 when the converse was true; and 0 when quality of images was equal Results: in superficial carcinoma, the mean scores for image quality with regard to detectability, extent, and surface structure were 0.19, 0.48, and 0.31 respectively. in advanced carcinoma, the scores were 0.00, 0.76, and 0.25 respectively Conclusion: ASF offers an improved image quality which is valuable in the evaluation of esophageal carcinoma, particularly in the detection of superficial carcinomas and in the identification of intraepithelial extension

Image quality of EOS low-dose radiography in comparison with conventional radiography for assessment of ventriculoperitoneal shunt integrity

2021 ◽  
pp. 1-7
Author(s):  
Karen Monuszko ◽  
Michael Malinzak ◽  
Lexie Zidanyue Yang ◽  
Donna Niedzwiecki ◽  
Herbert Fuchs ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Large Scale ◽  
Low Dose ◽  
Retrospective Chart Review ◽  
Conventional Radiography ◽  
Primary Diagnosis ◽  
Radiographic Images ◽  
Shunt Tubing

OBJECTIVEPatients with shunted hydrocephalus often accumulate high levels of radiation over their lifetimes during evaluation of hardware integrity. Current practice involves the use of a series of conventional radiographs for this purpose. Newer low-dose EOS radiography is currently used to evaluate scoliosis but has not been explored to evaluate shunt integrity on a large scale. The goal of this study was to compare the quality of imaging using EOS low-dose radiography to conventional radiography to evaluate shunt tubing.METHODSA retrospective chart review was performed on 57 patients who previously had both conventional radiographs and low-dose EOS images of their cerebral shunt tubing from 2000 to 2018. Patient demographics (age, sex, type of shunt tubing, primary diagnosis) were collected. Conventional radiographic images and low-dose EOS images were independently analyzed by a neurosurgeon and neuroradiologist in three categories: image quality, delineation of shunt, and distinction of shunt compared to adjacent anatomy.RESULTSAll patients had shunted hydrocephalus due to spina bifida and Chiari type II malformation. Ratings of EOS and conventional radiographic images by both raters did not differ significantly in terms of image quality (rater 1, p = 0.499; rater 2, p = 0.578) or delineation of shunt (p = 0.107 and p = 0.256). Conventional radiographic images received significantly higher ratings than EOS on the ability to distinguish the shunt versus adjacent anatomy by rater 1 (p = 0.039), but not by rater 2 (p = 0.149). The overall score of the three categories combined was not significantly different between EOS and conventional radiography (rater 1, p = 0.818; rater 2, p = 0.186). In terms of cost, an EOS image was less costly than a conventional radiography shunt series ($236–$366 and $1300–$1547, respectively). The radiation dose was also lower for EOS images, with an effective dose of 0.086–0.140 mSv compared to approximately 1.6 mSv for a similar field of view with conventional radiography.CONCLUSIONSThe image quality of low-dose EOS radiography does not significantly differ from conventional radiography for the evaluation of cerebral shunts. In addition, EOS affords a much lower radiation dose and a lower cost.

Observability of Very Thick Specimen by Using Transmission Scanning Electron Microscope

1971 ◽  
Vol 29 ◽  
pp. 26-27
Author(s):  
K. Shibatomi ◽  
T. Yamanoto ◽  
H. Koike
Keyword(s):  
Electron Microscope ◽  
Image Quality ◽  
Scanning Electron Microscope ◽  
Chromatic Aberration ◽  
Image Contrast ◽  
Objective Lens ◽  
Thick Specimen ◽  
Transmission Electron ◽  
Scanning Electron

In the observation of a thick specimen by means of a transmission electron microscope, the intensity of electrons passing through the objective lens aperture is greatly reduced. So that the image is almost invisible. In addition to this fact, it have been reported that a chromatic aberration causes the deterioration of the image contrast rather than that of the resolution. The scanning electron microscope is, however, capable of electrically amplifying the signal of the decreasing intensity, and also free from a chromatic aberration so that the deterioration of the image contrast due to the aberration can be prevented. The electrical improvement of the image quality can be carried out by using the fascionating features of the SEM, that is, the amplification of a weak in-put signal forming the image and the descriminating action of the heigh level signal of the background. This paper reports some of the experimental results about the thickness dependence of the observability and quality of the image in the case of the transmission SEM.

18: Measuring Quality-of-Life after Surgery: Development and Validation of the Convalescence and Recovery Evaluation (CARE)

2007 ◽  
Vol 177 (4S) ◽  
pp. 7-7
Author(s):  
Brent K. Hollenbeck ◽  
J. Stuart Wolf ◽  
Rodney L. Dunn ◽  
Martin G. Sanda ◽  
David P. Wood ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Development And Validation
Sign in / Sign up

Export Citation Format

Share Document