TY - JOUR
T1 - An evaluation of computed tomography dose index measurements using a pencil ionisation chamber and small detectors
AU - Anam, Choirul
AU - Fujibuchi, Toshioh
AU - Haryanto, Freddy
AU - Widita, Rena
AU - Arif, Idam
AU - Dougherty, Geoff
N1 - Funding Information:
This work was funded by the Penelitian Dasar Unggulan Perguruan Tinggi (PDUPT) 2018, Ministry of Research Technology and Higher Education of the Republic of Indonesia.
Publisher Copyright:
© 2019 Society for Radiological Protection. Published on behalf of SRP by IOP Publishing Limited. All rights reserved.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/3
Y1 - 2019/3
N2 - The aim of this study was to compare the values of the computed tomography dose index 100 (CTDI100) obtained using two small detectors (i.e. a small ionisation chamber and a small solid state detector) with those obtained from a 100 mm pencil ionisation chamber for various input CT parameters: beam width, kVp, mAs, pitch, and head-body phantom variation. The measurement of CTDI100 using the 100 mm pencil chamber was carried out in a single rotation of axial mode, while the measurement using small detectors was carried out in helical mode. The differences of CTDI100 values obtained with two small detectors were about 7% for all variations. The differences of CTDI100 values obtained with small detectors and a 100 mm pencil ionisation chamber for beam widths of more than 4 mm were within 40%. However, for the narrowest beam widths (4 mm), the difference between them was very large (about 150%).
AB - The aim of this study was to compare the values of the computed tomography dose index 100 (CTDI100) obtained using two small detectors (i.e. a small ionisation chamber and a small solid state detector) with those obtained from a 100 mm pencil ionisation chamber for various input CT parameters: beam width, kVp, mAs, pitch, and head-body phantom variation. The measurement of CTDI100 using the 100 mm pencil chamber was carried out in a single rotation of axial mode, while the measurement using small detectors was carried out in helical mode. The differences of CTDI100 values obtained with two small detectors were about 7% for all variations. The differences of CTDI100 values obtained with small detectors and a 100 mm pencil ionisation chamber for beam widths of more than 4 mm were within 40%. However, for the narrowest beam widths (4 mm), the difference between them was very large (about 150%).
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U2 - 10.1088/1361-6498/aaf2b4
DO - 10.1088/1361-6498/aaf2b4
M3 - Article
C2 - 30524057
AN - SCOPUS:85062002209
SN - 0952-4746
VL - 39
SP - 112
EP - 124
JO - Journal of the Society for Radiological Protection
JF - Journal of the Society for Radiological Protection
IS - 1
ER -
