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

• DOI: 10.1186/s13047-015-0067-8
• Publication Date: 2015-03-11T17:41:36Z
• Authors: Juha Koivisto; Timo Kiljunen; Nils Kadesjö; Xie‐Qi Shi; Jan Wolff
• Keywords: 610; Diseases of the musculoskeletal system; 03 medical and health sciences; 0302 clinical medicine; SDG 3 - Good Health and Well-being; COMPUTED-TOMOGRAPHY; Orthopedics and Sports Medicine; LOWER-EXTREMITY; EXPOSURE; MOSFET DOSIMETERS; INDEX; Effective dose; Research; X-ray imaging; CBCT; Organ dose; 620; X‐ray imaging; Physical sciences; RC925-935; X-RAY; WEIGHT; MONTE-CARLO SIMULATIONS; SYSTEM; Health care science

AbstractBackgroundThe 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.MethodsOrgan 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).ResultsMeasurements 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.ConclusionsCompared 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.