Impact of Different Evaluation Methods for Diagnostic Tasks in Panoramic Radiography

The aim of this study was to evaluate the observers’ diagnostic performance in panoramic radiography using monitor, tablet, X-ray image view box, and against window daylight as a visualization method in different diagnostic tasks. Thirty panoramic radiography were assessed by three calibrated observers for each visualization method, in standardized light conditions, concerning dental caries, widened periodontal ligament space, and periapical bone defects from the four first molars; mucosal thickening and retention cysts in maxillary sinus; and stylo-hyoid ligament calcification and atheroma. A five-point confidence scale was used. The standard-reference was performed by two experienced observers. Diagnostic values using window light were significantly lower for caries and periapical bone defect and retention cyst, stylo-hyoid ligament calcification detection (p<0.05). For atheroma detection, X-ray image view box, tablet, and widow light had lower accuracy than the evaluation on the monitor (p<0.05). Observer’s diagnostic performances are worsened using window light as an evaluation method for panoramic radiography for dental, sinus, and calcification disorders, while the monitor was the most reliable method.

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Multi-exposure X-ray image fusion quality evaluation based on CSF and gradient amplitude similarity

Journal of X-Ray Science and Technology ◽

10.3233/xst-210871 ◽

2021 ◽

pp. 1-13

Author(s):

Yanjie Qi ◽

Zehui Yang ◽

Lin Kang

Keyword(s):

Image Fusion ◽

Quality Evaluation ◽

Evaluation Method ◽

Dynamic Range ◽

Reference Image ◽

Subjective Perception ◽

Steel Component ◽

Imaging Device ◽

X Ray ◽

Gradient Amplitude

Due to the limitation of dynamic range of the imaging device, the fixed-voltage X-ray images often produce overexposed or underexposed regions. Some structure information of the composite steel component is lost. This problem can be solved by fusing the multi-exposure X-ray images taken by using different voltages in order to produce images with more detailed structures or information. Due to the lack of research on multi-exposure X-ray image fusion technology, there is no evaluation method specially for multi-exposure X-ray image fusion. For the multi-exposure X-ray fusion images obtained by different fusion algorithms may have problems such as the detail loss and structure disorder. To address these problems, this study proposes a new multi-exposure X-ray image fusion quality evaluation method based on contrast sensitivity function (CSF) and gradient amplitude similarity. First, with the idea of information fusion, multiple reference images are fused into a new reference image. Next, the gradient amplitude similarity between the new reference image and the test image is calculated. Then, the whole evaluation value can be obtained by weighting CSF. In the experiments of MEF Database, the SROCC of the proposed algorithm is about 0.8914, and the PLCC is about 0.9287, which shows that the proposed algorithm is more consistent with subjective perception in MEF Database. Thus, this study demonstrates a new objective evaluation method, which generates the results that are consistent with the subjective feelings of human eyes.

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Dental panoramic radiography with intra-oral X-ray tubes

Australian Dental Journal ◽

10.1111/j.1834-7819.1986.tb02981.x ◽

1986 ◽

Vol 31 (1) ◽

pp. 40-43 ◽

Cited By ~ 1

Author(s):

J. J. Keur ◽

R. Macdonald

Keyword(s):

Panoramic Radiography ◽

X Ray

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Evaluation of Radiographic Outcomes after Core Decompression for Osteonecrosis of the Femoral Head: The Beijing University of Chinese Medicine X-ray Evaluation Method

The Journal of Bone and Joint Surgery (American) ◽

10.2106/jbjs.20.00478 ◽

2021 ◽

Vol Publish Ahead of Print ◽

Author(s):

Zeqing Huang ◽

Taixian Li ◽

Na Lin ◽

Quanjun Cui ◽

Weiheng Chen

Keyword(s):

Chinese Medicine ◽

Femoral Head ◽

Evaluation Method ◽

Core Decompression ◽

X Ray ◽

Radiographic Outcomes

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Applications of Dual-Energy X-ray Computed Tomography to Structural Ceramics*

Advances in X-ray Analysis ◽

10.1154/s0376030800021005 ◽

1988 ◽

Vol 32 ◽

pp. 629-640

Author(s):

W. A. Ellingson ◽

M. W. Vannier

Keyword(s):

Computed Tomography ◽

Evaluation Method ◽

Combustion Engine ◽

Mass Density ◽

Energy Levels ◽

Dual Energy ◽

Structural Ceramics ◽

X Ray ◽

X Ray Computed ◽

Engine Components

AbstractAdvanced structural ceramics (Si3N4, SiC, A12O3, ZrO2) are rapidly being developed with sufficient fracture toughness to be considered for engineering applications such as internal combustion engine components, rotating turbine engine components, and heat recovery systems. X-ray computed tomography (CT) is a promising nondestructive evaluation method for these ceramics, but beam hardening presents a serious problem in the interpretation of CT images generated with polychromatic X-ray sources by creating artifacts . Dual-energy X-ray techniques have the potential to eliminate these problems. In addition, in theory, dual energy allows generation of quasimonochromatic equivalent images, which should allow verification of theoretically determined optimum energies. In using dual-energy methods, the high-and low-energy images are nonlinearly transformed to generate two energy-independent images characterizing the integrated Compton/photoelectric attenuation components. Characteristic linear combinations of these two "basis" images can serve to identify unknown materials and generate synthesized monoenergetic images.The dual-energy method has been used to study structural ceramics as well as liquids that are close to ceramic materials in atomic number and mass density. The work was done on a Siemens DR-H CT machine with 85- and 125-kVp energy levels. Test samples included Si3N4 cylinders ranging from 10 to 50 mm in diameter, liquid Freon TF, and densified SiC.

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The First Clinical Use of Augmented Reality to Treat Salivary Stones

Case Reports in Dentistry ◽

10.1155/2020/5960421 ◽

2020 ◽

Vol 2020 ◽

pp. 1-4

Author(s):

Anna Lysenko ◽

Alexandra Razumova ◽

Andrey Yaremenko ◽

Rustam Mirzakhmedov ◽

Anna Zubareva ◽

...

Keyword(s):

Augmented Reality ◽

Clinical Case ◽

Surgical Intervention ◽

Model Fitting ◽

Nasal Intubation ◽

Visualization Method ◽

X Ray ◽

Cast Model ◽

Augmented Reality Technology ◽

Preoperative Procedures

In this study, we report our first experience of applying the concretion visualization method using augmented reality technology. A clinical case of a new surgical intervention on the parotid salivary gland with the localization of salivary stone in its parenchyma is considered. During additional diagnostics, it was found that the size of the concretion exceeds 5 mm which did not allow us to use the endoscopic technologies. That was the reason for the choice of surgical intervention external access using salivary stone visualization with the help of augmented reality. The preoperative procedures included making the upper jaw cast model, fitting the model and individual mouthguard with an X-ray contrast marker and marker slot. In addition to this, computed tomography of the head and neck using a mouthguard was made. During surgery under general anesthesia with nasal intubation, the mouthguard together with the marker is installed in the patient’s mouth and the surgeon puts on the glasses to visualize the stone image in place of its localization. This method enables to visualize the salivary stone on all surgery stages no matter what type of approach is used or performing hydropreparation. That is why using the augmented reality appears promising and is to be studied further.

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