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The reduction methods of operator's radiation dose for portable dental X-ray machines.

Cho JY, Han WJ - Restor Dent Endod (2012)

Bottom Line: Two kinds of portable dental X-ray machines (DX3000, Dexcowin and Rextar, Posdion) were used.And the backscatter shield reduced operator's radiation dose at the operator's chest and waist levels to 0.1 - 37%.When portable dental X-ray systems are used, it is recommended to select X-ray machine attached with a backscatter shield and a long cone and to wear the lead gloves.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral & Maxillofacial Radiology, Dankook University College of Dentistry, Cheonan, Korea.

ABSTRACT

Objectives: This study was aimed to investigate the methods to reduce operator's radiation dose when taking intraoral radiographs with portable dental X-ray machines.

Materials and methods: Two kinds of portable dental X-ray machines (DX3000, Dexcowin and Rextar, Posdion) were used. Operator's radiation dose was measured with an 1,800 cc ionization chamber (RadCal Corp.) at the hand level of X-ray tubehead and at the operator's chest and waist levels with and without the backscatter shield. The operator's radiation dose at the hand level was measured with and without lead gloves and with long and short cones.

Results: The backscatter shield reduced operator's radiation dose at the hand level of X-ray tubehead to 23 - 32%, the lead gloves to 26 - 31%, and long cone to 48 - 52%. And the backscatter shield reduced operator's radiation dose at the operator's chest and waist levels to 0.1 - 37%.

Conclusions: When portable dental X-ray systems are used, it is recommended to select X-ray machine attached with a backscatter shield and a long cone and to wear the lead gloves.

No MeSH data available.


Scattered radiation dose was measured by an ionization chamber at the operator's waist level.
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Figure 6: Scattered radiation dose was measured by an ionization chamber at the operator's waist level.

Mentions: The scattered radiation was measured at the operator's chest and waist levels at a horizontal distance of 20 cm away from the X-ray machine during the exposure of lower posterior teeth, with and without a lead backscatter shield attached at the end of cone. A vertical distance of 130 cm from the floor was used as the chest height and 70 cm from the floor as the waist height (Figure 6).


The reduction methods of operator's radiation dose for portable dental X-ray machines.

Cho JY, Han WJ - Restor Dent Endod (2012)

Scattered radiation dose was measured by an ionization chamber at the operator's waist level.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3569401&req=5

Figure 6: Scattered radiation dose was measured by an ionization chamber at the operator's waist level.
Mentions: The scattered radiation was measured at the operator's chest and waist levels at a horizontal distance of 20 cm away from the X-ray machine during the exposure of lower posterior teeth, with and without a lead backscatter shield attached at the end of cone. A vertical distance of 130 cm from the floor was used as the chest height and 70 cm from the floor as the waist height (Figure 6).

Bottom Line: Two kinds of portable dental X-ray machines (DX3000, Dexcowin and Rextar, Posdion) were used.And the backscatter shield reduced operator's radiation dose at the operator's chest and waist levels to 0.1 - 37%.When portable dental X-ray systems are used, it is recommended to select X-ray machine attached with a backscatter shield and a long cone and to wear the lead gloves.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral & Maxillofacial Radiology, Dankook University College of Dentistry, Cheonan, Korea.

ABSTRACT

Objectives: This study was aimed to investigate the methods to reduce operator's radiation dose when taking intraoral radiographs with portable dental X-ray machines.

Materials and methods: Two kinds of portable dental X-ray machines (DX3000, Dexcowin and Rextar, Posdion) were used. Operator's radiation dose was measured with an 1,800 cc ionization chamber (RadCal Corp.) at the hand level of X-ray tubehead and at the operator's chest and waist levels with and without the backscatter shield. The operator's radiation dose at the hand level was measured with and without lead gloves and with long and short cones.

Results: The backscatter shield reduced operator's radiation dose at the hand level of X-ray tubehead to 23 - 32%, the lead gloves to 26 - 31%, and long cone to 48 - 52%. And the backscatter shield reduced operator's radiation dose at the operator's chest and waist levels to 0.1 - 37%.

Conclusions: When portable dental X-ray systems are used, it is recommended to select X-ray machine attached with a backscatter shield and a long cone and to wear the lead gloves.

No MeSH data available.