Organ doses and subjective image quality of indirect digital panoramic radiography

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.

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The Subjective Image Quality of Conventional and Digital Panoramic Radiography Among 6 to 10 year old Children

Journal of Clinical Pediatric Dentistry ◽

10.17796/jcpd.31.2.46lx77211v483x01 ◽

2007 ◽

Vol 31 (2) ◽

pp. 109-112 ◽

Cited By ~ 3

Author(s):

N Makris ◽

K Tsiklakis ◽

K Alexiou ◽

A Vierrou ◽

Th Stefaniotis

Keyword(s):

Image Quality ◽

Rating Scale ◽

Panoramic Radiography ◽

Image Interpretation ◽

Diagnostic Image Quality ◽

Diagnostic Quality ◽

Digital Panoramic Radiography ◽

Pediatric Dentists ◽

Tooth Germs

Objectives: To compare the diagnostic quality of orthopantomographs made with the conventional unit Orthophos Siemens and the direct digital unit Planmeca 2000 cc Proline among children 6-10 years old and to investigate possible differences on image interpretation between oral radiologists and pediatric dentists. Methods: Study material included two independent groups of panoramic images (50 in each group) made with different panoramic modalities (digital, conventional). Eight observers (four pediatric dentists and four oral radiologists) evaluated all images for diagnostic quality in 12 pre-determined areas using a 4-point rating scale. Results: Digital and conventional panoramic radiography performed almost similarly as far as it concerns the specific diagnostic tasks rated with the exception of the interproximal contacts of mandibular molars where digital panoramic radiography was scored significantly higher and the periapical region of anterior mandible and anterior mandibular tooth germs where conventional panoramic radiography was found to be significantly better. Both oral radiologists and pediatric dentists graded similarly digital and conventional radiographs for a variety of diagnostic tasks. Conclusions: It can be concluded that diagnostic image quality obtained with the digital orthopantomograph unit Planmeca 2000 cc Proline was generally equal to image quality obtained with the conventional orthopantomograph unit Orthophos Plus CD. Image interpretation between oral radiologists and pediatric dentists was not substantially different

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The comparison of subjective image quality in conventional and digital panoramic radiography

Indian Journal of Dental Research ◽

10.4103/0970-9290.49052 ◽

2009 ◽

Vol 20 (1) ◽

pp. 21 ◽

Cited By ~ 5

Author(s):

Ilkay Peker ◽

AlkurtM Toraman ◽

G Usalan ◽

B Altunkaynak

Keyword(s):

Image Quality ◽

Panoramic Radiography ◽

Subjective Image Quality ◽

Digital Panoramic Radiography

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Subjective image quality in digital panoramic radiography in relation to patient exposure

International Congress Series ◽

10.1016/s0531-5131(01)00254-0 ◽

2001 ◽

Vol 1230 ◽

pp. 1291-1292

Author(s):

C. Scheifele ◽

M. Hadjizadeh ◽

U. Thole ◽

A. Wree ◽

W. Hopfenmüller

Keyword(s):

Image Quality ◽

Panoramic Radiography ◽

Patient Exposure ◽

Subjective Image Quality ◽

Digital Panoramic Radiography

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Objective and subjective image quality of primary and recurrent squamous cell carcinoma on head and neck low-tube-voltage 80-kVp computed tomography

Neuroradiology ◽

10.1007/s00234-015-1512-x ◽

2015 ◽

Vol 57 (6) ◽

pp. 645-651 ◽

Cited By ~ 18

Author(s):

Jan-Erik Scholtz ◽

Moritz Kaup ◽

Johannes Kraft ◽

Eva-Maria Nöske ◽

Friedrich Scheerer ◽

...

Keyword(s):

Computed Tomography ◽

Squamous Cell Carcinoma ◽

Image Quality ◽

Cell Carcinoma ◽

Head And Neck ◽

Tube Voltage ◽

Subjective Image Quality ◽

Low Tube Voltage ◽

Recurrent Squamous Cell Carcinoma

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Digital panoramic radiography image quality: A comparison with film-based panoramic radiography

Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology ◽

10.1016/j.tripleo.2004.11.035 ◽

2005 ◽

Vol 99 (3) ◽

pp. E25

Author(s):

N. Luangjamekorn ◽

N. Williams ◽

N. Angelopoulos

Keyword(s):

Image Quality ◽

Panoramic Radiography ◽

Digital Panoramic Radiography

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A comparative study on image quality of two digital intraoral sensors

Dentomaxillofacial Radiology ◽

10.1259/dmfr.20190063 ◽

2019 ◽

Vol 48 (7) ◽

pp. 20190063 ◽

Cited By ~ 2

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.

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Radiation dose and image quality of high-pitch emergency abdominal CT in obese patients using third-generation dual-source CT (DSCT)

Scientific Reports ◽

10.1038/s41598-019-52454-5 ◽

2019 ◽

Vol 9 (1) ◽

Author(s):

Robert Forbrig ◽

Michael Ingrisch ◽

Robert Stahl ◽

Katharina Stella Winter ◽

Maximilian Reiser ◽

...

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Third Generation ◽

Obese Patients ◽

Dual Source Ct ◽

High Pitch ◽

Subjective Image Quality ◽

Dual Source ◽

Group A

Abstract In this third-generation dual-source CT (DSCT) study, we retrospectively investigated radiation dose and image quality of portal-venous high-pitch emergency CT in 60 patients (28 female, mean age 56 years) with a body mass index (BMI) ≥ 30 kg/m2. Patients were dichotomized in groups A (median BMI 31.5 kg/m2; n = 33) and B (36.8 kg/m2; n = 27). Volumetric CT dose index (CTDIvol), size-specific dose estimate (SSDE), dose length product (DLP) and effective dose (ED) were assessed. Contrast-to-noise ratio (CNR) and dose-independent figure-of-merit (FOM) CNR were calculated. Subjective image quality was assessed using a five-point scale. Mean values of CTDIvol, SSDE as well as normalized DLP and ED were 7.6 ± 1.8 mGy, 8.0 ± 1.8 mGy, 304 ± 74 mGy * cm and 5.2 ± 1.3 mSv for group A, and 12.6 ± 3.7 mGy, 11.0 ± 2.6 mGy, 521 ± 157 mGy * cm and 8.9 ± 2.7 mSv for group B (p < 0.001). CNR of the liver and spleen as well as each calculated FOM CNR were significantly higher in group A (p < 0.001). Subjective image quality was good in both groups. In conclusion, third-generation abdominal high-pitch emergency DSCT yields good image quality in obese patients. Radiation dose increases in patients with a BMI > 36.8 kg/m2.

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