Charge-coupled device panoramic radiography: effect of beam energy on radiation exposure.

Farman, Taeko T.; Farman, Allan G.; Kelly, Michael S.; Firriolo, F J; Yancey, Jessica; Stewart, AF

doi:10.1038/sj.dmfr.4600316

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…All the digital Xray systems tested resulted in a reduced dosage of radiation, as compared with using E-speed films, although the magnitude of the reduction was dependent upon the system used and ranged from 30 to 70%. In digital panoramic radiography, dose reductions of 40-70%, without significantly affecting the subjective image quality, have been reported in studies conducted by Farman et al, 11 Dula et al 12 and Dannewitz et al 13 In panoramic radiography, the radiation field size is system dependent, with different preset collimator height and/or width settings sometimes available. These can be used to reduce the dose, particularly for paediatric patients.…”

Section: Introductionmentioning

confidence: 97%

Absorbed organ and effective doses from digital intra-oral and panoramic radiography applying the ICRP 103 recommendations for effective dose estimations

Granlund¹,

Thilander-Klang²,

Ylhan³

et al. 2016

BJR

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Objective: During dental radiography, the salivary and thyroid glands are at radiation risk. In 2007, the International Commission on Radiological Protection (ICRP) updated the methodology for determining the effective dose, and the salivary glands were assigned tissue-specific weighting factors for the first time. The aims of this study were to determine the absorbed dose to the organs and to calculate, applying the ICRP publication 103 tissue-weighting factors, the effective doses delivered during digital intraoral and panoramic radiography. Methods: Thermoluminescent dosemeter measurements were performed on an anthropomorphic head and neck phantom. The organ-absorbed doses were measured at 30 locations, representing different radiosensitive organs in the head and neck, and the effective dose was calculated according to the ICRP recommendations.

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Section: Introductionmentioning

confidence: 97%

Absorbed organ and effective doses from digital intra-oral and panoramic radiography applying the ICRP 103 recommendations for effective dose estimations

Granlund¹,

Thilander-Klang²,

Ylhan³

et al. 2016

BJR

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“…At least five commercially available systems for CCD-based panoramic radiography are currently on the market. The DigiPan Universal (Trophy Radiology, Marnela-Vallee, France) and the Orthophos DS (Sirona AG, Bensheim, Germany) were previously discussed in relationship to radiation dose reduction 6,11) .…”

Section: Transformation Into Digital Images Suitable For Dental Applimentioning

confidence: 99%

Digital Imaging Modalities for Dental Practice.

Wakoh

Kuroyanagi

2001

Bull. Tokyo Dent. Coll.

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The introduction of the computed tomograph in the 1970s revolutionized medical diagnosis by initiating the transition from analogue to digital imaging. During this period, more specialized equipment for image processing was developed, such as cathode-ray tubes for image display, special sensors for image acquisition, and storage devices for image archiving. Digital imaging systems designed exclusively for use in dentistry were developed in the latter half of the 1980s. Some are now being clinically applied under conditions of close scrutiny to determine diagnostic accuracy, image quality, and radiation exposure to patients. This article reviews the enabling technologies of digital systems used in dentistry, and focuses upon intraoral digital imaging systems, concepts for digital image acquisition, and variations in radiation dose and their effects on diagnostic accuracy of caries detection.

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“…While the use of CR for rotational panoramic radiography is increasing, an online system that uses a charge-coupled device (CCD) line sensor in combination with fluorescent material is being developed. 1,2 Because intraoral radiography is unique to dentistry, the digital radiographic systems used in medical practice cannot be used for this application without modification. Consequently, specialized intraoral systems that use X-ray sensors instead of intraoral X-ray film are becoming necessary.…”

Section: Introductionmentioning

confidence: 99%

Patient dose in charge-coupled device-based full-mouth intraoral radiography

2006

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Objectives. This study investigated the effect of the size of the sensitive area of the charge-coupled devices (CCD) used in digital intraoral radiographic systems on the patient effective dose in full-mouth radiographic examinations. Methods. The effective dose was assessed in full-mouth radiographic examinations using the bisecting angle technique, while assuming that CCD sensitivity is equivalent to that of E-speed film. The results were compared with the effective doses obtained using E-speed film. The tube potentials used were 70, 80, and 90 kV. The diameter of the circular field at the cone tip was 7 cm, and the length of the spacer cone was 20 cm. Twelve types of CCD devices with sensitive areas ranging from 307 to 1200 mm 2 were assessed in seven digital intraoral radiographic systems. Results. The number of exposures and effective dose using the CCD devices were inversely proportional to the sensitive area of the CCD. Both the number of exposures and the effective dose were increased when using a CCD with a sensitive area smaller than the intraoral film size. Consequently, a reduction in the patient dose did not occur to the extent expected, based on the relative sensitivity of the CCD to film. Conclusions. In order to fully realize the advantages of a CCD, it will be necessary both to reduce the frequency of examinations and to use a rectangular-shaped beam in CCD-based intraoral radiographic systems.

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Charge-coupled device panoramic radiography: effect of beam energy on radiation exposure.

Abstract: The DigiPan receptor produces satisfactory images with saving in entry exposure saving of approximately 70% when compared with a conventional film/rare earth screen combination.

Cited by 18 publications

References 20 publications

Absorbed organ and effective doses from digital intra-oral and panoramic radiography applying the ICRP 103 recommendations for effective dose estimations

Absorbed organ and effective doses from digital intra-oral and panoramic radiography applying the ICRP 103 recommendations for effective dose estimations

Digital Imaging Modalities for Dental Practice.

Patient dose in charge-coupled device-based full-mouth intraoral radiography

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