Skip to main content
Key Specialties
Cardiology Diabetology Endocrinology Gastroenterology Geriatrics and Gerontology Gynecology and Obstetrics Hematology Infectious Disease Internal Medicine Nephrology Neurology Oncology Pediatrics Respiratory Medicine Rheumatology Surgery
Congress Coverage
2024 ACC Congress 2023 ESMO Congress 2023 EASD Congress 2023 ERS Congress 2023 ESC Congress
Clinical Collections
Advances in Alzheimer’s

At a glance: The ONWARDS insulin icodec trials

A round-up of the ONWARDS phase 3 clinical trials evaluating the novel weekly insulin icodec in people with diabetes.
ADVANCED SEARCH
Log in
Top
Radiological Physics and Technology
Published in: Radiological Physics and Technology 2/2018

01-06-2018

Dosimetric changes with computed tomography automatic tube-current modulation techniques

Authors: Sofia Spampinato, Anna Maria Gueli, Pietro Milone, Luigi Angelo Raffaele

Published in: Radiological Physics and Technology | Issue 2/2018

Login to get access

Abstract

The study is aimed at a verification of dose changes for a computed tomography automatic tube-current modulation (ATCM) technique. For this purpose, anthropomorphic phantom and Gafchromic® XR-QA2 films were used. Radiochromic films were cut according to the shape of two thorax regions. The ATCM algorithm is based on noise index (NI) and three exam protocols with different NI were chosen, of which one was a reference. Results were compared with dose values displayed by the console and with Poisson statistics. The information obtained with radiochromic films has been normalized with respect to the NI reference value to compare dose percentage variations. Results showed that, on average, the information reported by the CT console and calculated values coincide with measurements. The study allowed verification of the dose information reported by the CT console for an ATCM technique. Although this evaluation represents an estimate, the method can be a starting point for further studies.
Literature
1.
International Commission on Radiation Units and Measurements. ICRU report no. 87: radiation dose and image-quality assessment in computed tomography. J ICRU. 2012;12(1):1–149.
2.
Lee CH, Goo JM, Lee HL, Ye SJ, Park CM, Chun EJ, Im JG. Radiation dose modulation techniques in the multidetector CT era: from basics to practice. RadioGraphics. 2008;28:1451–9.CrossRefPubMed
3.
Kalra MK, Maher MM, Toth TL, Schmidt B, Westerman BL, Morgan HT, Saini S. Techniques and applications of automatic tube current modulation for CT. Radiology. 2004;233(3):649–57.CrossRefPubMed
4.
Söderberg M, Gunnarsson M. Automatic exposure control in computed tomography—an evaluation of systems from different manufacturers. Acta Radiol. 2010;51(6):625–34.CrossRefPubMed
5.
Martin CJ, Sookpeng S. Setting up computed tomography automatic tube current modulation systems. J Radiol Prot. 2016;36(3):R74–95.CrossRefPubMed
6.
Schindera ST, Nelson RC, Toth TL, Nguyen GT, Toncheva GI, DeLong DM, Yoshizumi TT. Effect of patient size on radiation dose for abdominal MDCT with automatic tube current modulation: phantom study. Am J Roentgenol. 2008;190(2):W100–5.CrossRef
7.
Israel GM, Cicchiello L, Brink J, Huda W. Patient size and radiation exposure in thoracic, pelvic, and abdominal CT examinations performed with automatic exposure control. AJR. 2010;195:1342–6.CrossRefPubMed
8.
Meeson S, Alvey CM, Golding SJ. The in vivo relationship between cross-sectional area and CT dose index in abdominal multidetector CT with automatic exposure control. J Radiol Prot. 2010;30(2):139–47.CrossRefPubMed
9.
Sookpeng S, Martin CJ, Gentle D. Comparison of different phantom designs for CT scanner automatic tube current modulation system tests. J Radiol Prot. 2013;33(4):735–61.CrossRefPubMed
10.
Siegel MJ, Schmidt B, Bradley D, Suess C, Hildebolt C. Radiation dose and image quality in pediatric CT: effect of technical factors and phantom size and shape. Radiology. 2004;233(2):515–22.CrossRefPubMed
11.
Verdun FR, Lepori D, Monnin P, Valley JF, Schnyder P, Gudinchet F. Management of patient dose and image noise in routine pediatric CT abdominal examinations. Eur Radiol. 2004;14(5):835–41.CrossRefPubMed
12.
13.
14.
Brady S, Yoshizumi T, Toncheva G, Frus D. Implementation of radiochromic film dosimetry protocol for volumetric dose assessments to various organs during diagnostic CT procedures. Med Phys. 2010;37(9):4782–92.CrossRefPubMedPubMedCentral
15.
Sookpeng S, Butdee C. Signal-to-noise ratio and dose to the lens of the eye for computed tomography examination of the brain using an automatic tube current modulation system. Emerg Radiol. 2017;24(3):233–9.CrossRefPubMed
16.
Kanal KM, Stewart BK, Kolokythas O, Shuman WP. Impact of operator-selected image noise index and reconstruction slice thickness on patient radiation dose in 64-MDCT. AJR. 2007;189:219–25.CrossRefPubMed
17.
Spampinato S (2016) Radiochromic film dosimetry in computed tomography. Unpublished thesis, Specialization School in Medical Physics, Università di Catania, Catania, Italy.
18.
Rampado O, Garelli E, Deagostini S, Ropolo R. Dose and energy dependence of response of Gafchromic XR-QA film for kilovoltage X-ray beams. Phys Med Biol. 2006;51:2871–81.CrossRefPubMed
19.
Tomic N, Quintero C, Whiting BR, Aldelaijan S, Bekerat H, Liang L, DeBlois F, Seuntjens J, Devic S. Characterization of calibration curves and energy dependence GafChromic™ XR-QA2 model based radiochromic film dosimetry system. Med Phys. 2014;41(6):062105-1–9.
20.
Di Lillo F, Mettivier G, Sarno A, Tromba G, Tomic N, Devic S, Russo P. Energy dependent calibration of XR-QA2 radiochromic film with monochromatic and polychromatic X-ray beam. Med Phys. 2016;43:583–8.CrossRefPubMed
21.
Rampado O, Garelli E, Ropolo R. Computed tomography dose measurements with radiochromic films and a flatbed scanner. Med Phys. 2010;37(1):189–96.CrossRefPubMed
22.
Giaddui T, Cui Y, Galvin J, Yu Y, Xiao Y. Characteristics of Gafchromic XRQA2 films for kV image dose measurement. Med Phys. 2012;39(2):842–50.CrossRefPubMed
23.
Asero G, Greco C, Gueli AM, Raffaele L, Spampinato S. Evaluation of spatial resolution in image acquisition by optical flatbed scanners for radiochromic film dosimetry. JINST. 2016;11:P03024.CrossRef
24.
25.
Moro L, Panizza D, D’Ambrosio D, Carne I. Considerations on an automatic computed tomography tube current modulation system. Radiat Prot Dosim. 2013;156(4):525–30.CrossRef
26.
Huda W, Mettler FA. Volume CT dose index and dose-length product displayed during CT: what good are they? Radiology. 2011;258(1):236–42.CrossRefPubMed
27.
American Association of Physicists in Medicine (2011) Size-specific dose estimates in pediatric and adult body CT examinations. AAPM report no. 204. ISBN: 978-1-936366-08-8.
28.
American Association of Physicists in Medicine (2014) Use of water equivalent diameter for calculating patient size and size-specific dose estimates (SSDE) in CT. AAPM report no. 220. ISBN: 978-1-936366-39-2.
29.
McCollough CH, Bruesewitz MR, Kofler JM Jr. CT dose reduction and dose management tools: overview of available options. Radiographics. 2006;26:503–12.CrossRefPubMed
Metadata
Title
Dosimetric changes with computed tomography automatic tube-current modulation techniques
Authors
Sofia Spampinato
Anna Maria Gueli
Pietro Milone
Luigi Angelo Raffaele
Publication date
01-06-2018
Publisher
Springer Singapore
Published in
Radiological Physics and Technology / Issue 2/2018
Print ISSN: 1865-0333
Electronic ISSN: 1865-0341
DOI
https://doi.org/10.1007/s12194-018-0454-5

Other articles of this Issue 2/2018

Radiological Physics and Technology 2/2018 Go to the issue

OriginalPaper

Reduction of respiratory ghosting motion artifacts in conventional two-dimensional multi-slice Cartesian turbo spin-echo: which k-space filling order is the best?

OriginalPaper

Quantitation of specific binding ratio in 123I-FP-CIT SPECT: accurate processing strategy for cerebral ventricular enlargement with use of 3D-striatal digital brain phantom

ReviewPaper

Overview on subjective similarity of images for content-based medical image retrieval

OriginalPaper

Utility of the variable flip angle 3D fast-spin echo (isoFSE) sequence on 3T MR for diagnosing vertebrobasilar artery dissection

OriginalPaper

Body size and tube voltage-dependent guiding equations for optimal selection of image acquisition parameters in clinical X-ray imaging

OriginalPaper

Output factor determination based on Monte Carlo simulation for small cone field in 10-MV photon beam