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Effective radiation dose of a MSCT, two CBCT and one conventional radiography device in the ankle region.

Koivisto J, Kiljunen T, Kadesjö N, Shi XQ, Wolff J - J Foot Ankle Res (2015)

Bottom Line: Measurements of the MSCT device resulted in 21.4 μSv effective dose.Compared with a conventional 2D radiographic device, this study showed a 14-fold effective dose for standard MSCT and 1.3 -10 fold effective dose for standard CBCT protocols.CBCT devices offers a 3D view of ankle imaging and exhibited lower effective doses compared with MSCT.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Helsinki, Helsinki, Finland.

ABSTRACT

Background: The aim of this study was to assess and compare the effective doses (ICRP 103) in the ankle region of X-ray imaging resulting from a multi slice computed tomography (MSCT) device, two cone beam CT (CBCT) devices and one conventional x-ray device.

Methods: Organ dose measurements were performed using 20 metal oxide field effect transistor (MOSFET) dosimeters that were placed in a custom made anthropomorphic RANDO ankle phantom. The following scanners were assessed in this study: Siemens Sensation Open 24-slice MSCT-scanner (120 kVp, 54 mAs), NewTom 5G CBCT scanner (110 kVp, 2.3 - 59 mAs), Planmed Verity CBCT-scanner (90 kVp, 48 mAs), Shimadzu FH-21 HR direct radiography equipment (AP + LAT), (57 kVp, 16 mAs).

Results: Measurements of the MSCT device resulted in 21.4 μSv effective dose. The effective doses of CBCTs were between 1.9 μSv and 14.3 μSv for NewTom 5G and 6.0 μSv for Planmed Verity. Effective doses for the Shimadzu FH-21 HR conventional radiography were 1.0 μSv (LAT) and 0.5 μSv (AP), respectively.

Conclusions: Compared with a conventional 2D radiographic device, this study showed a 14-fold effective dose for standard MSCT and 1.3 -10 fold effective dose for standard CBCT protocols. CBCT devices offers a 3D view of ankle imaging and exhibited lower effective doses compared with MSCT.

No MeSH data available.


The measurement setup for the Planmed Verity CBCT scanner (A) and the NewTom 5G CBCT scanner (B).
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Fig1: The measurement setup for the Planmed Verity CBCT scanner (A) and the NewTom 5G CBCT scanner (B).

Mentions: Effective doses were calculated form organ doses obtained on one MSCT device, two CBCT devices and one conventional radiographic device: Siemens Sensation Open 24-slice scanner (Siemens, Forchheim, Germany), Planmed Verity CBCT-scanner (Figure 1A) (Planmed Oy, Helsinki, Finland), NewTom 5G CBCT scanner (Figure 1B) (NewTom 5G®, QR, Verona, Italy) and Shimadzu FH-21 HR direct digital radiography equipment (Shimadzu Corporation, Kyoto, Japan).Figure 1


Effective radiation dose of a MSCT, two CBCT and one conventional radiography device in the ankle region.

Koivisto J, Kiljunen T, Kadesjö N, Shi XQ, Wolff J - J Foot Ankle Res (2015)

The measurement setup for the Planmed Verity CBCT scanner (A) and the NewTom 5G CBCT scanner (B).
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4363062&req=5

Fig1: The measurement setup for the Planmed Verity CBCT scanner (A) and the NewTom 5G CBCT scanner (B).
Mentions: Effective doses were calculated form organ doses obtained on one MSCT device, two CBCT devices and one conventional radiographic device: Siemens Sensation Open 24-slice scanner (Siemens, Forchheim, Germany), Planmed Verity CBCT-scanner (Figure 1A) (Planmed Oy, Helsinki, Finland), NewTom 5G CBCT scanner (Figure 1B) (NewTom 5G®, QR, Verona, Italy) and Shimadzu FH-21 HR direct digital radiography equipment (Shimadzu Corporation, Kyoto, Japan).Figure 1

Bottom Line: Measurements of the MSCT device resulted in 21.4 μSv effective dose.Compared with a conventional 2D radiographic device, this study showed a 14-fold effective dose for standard MSCT and 1.3 -10 fold effective dose for standard CBCT protocols.CBCT devices offers a 3D view of ankle imaging and exhibited lower effective doses compared with MSCT.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, University of Helsinki, Helsinki, Finland.

ABSTRACT

Background: The aim of this study was to assess and compare the effective doses (ICRP 103) in the ankle region of X-ray imaging resulting from a multi slice computed tomography (MSCT) device, two cone beam CT (CBCT) devices and one conventional x-ray device.

Methods: Organ dose measurements were performed using 20 metal oxide field effect transistor (MOSFET) dosimeters that were placed in a custom made anthropomorphic RANDO ankle phantom. The following scanners were assessed in this study: Siemens Sensation Open 24-slice MSCT-scanner (120 kVp, 54 mAs), NewTom 5G CBCT scanner (110 kVp, 2.3 - 59 mAs), Planmed Verity CBCT-scanner (90 kVp, 48 mAs), Shimadzu FH-21 HR direct radiography equipment (AP + LAT), (57 kVp, 16 mAs).

Results: Measurements of the MSCT device resulted in 21.4 μSv effective dose. The effective doses of CBCTs were between 1.9 μSv and 14.3 μSv for NewTom 5G and 6.0 μSv for Planmed Verity. Effective doses for the Shimadzu FH-21 HR conventional radiography were 1.0 μSv (LAT) and 0.5 μSv (AP), respectively.

Conclusions: Compared with a conventional 2D radiographic device, this study showed a 14-fold effective dose for standard MSCT and 1.3 -10 fold effective dose for standard CBCT protocols. CBCT devices offers a 3D view of ankle imaging and exhibited lower effective doses compared with MSCT.

No MeSH data available.