Possibilities of Reducing Radiation Dose in Computed Tomography
Examinations in Various Age Groups Using an Iterative
Model-Based Reconstruction Technique

J 2016

Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique

ČERVINKOVÁ, Ivana, Petr WALEK, Igor JÍRA, Jarmila SKOTÁKOVÁ, Jan ŠENKYŘÍK et. al.

Základní údaje

Originální název

Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique

Autoři

ČERVINKOVÁ, Ivana (203 Česká republika, domácí), Petr WALEK (203 Česká republika), Igor JÍRA (203 Česká republika), Jarmila SKOTÁKOVÁ (203 Česká republika, domácí), Jan ŠENKYŘÍK (203 Česká republika, domácí), Petr OUŘEDNÍČEK (203 Česká republika) a Jiří JAN (203 Česká republika)

Vydání

Pediatrics & Therapeutics, Los Angeles, OMICS International, 2016, 2161-0665

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

30224 Radiology, nuclear medicine and medical imaging

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14110/16:00095995

Organizační jednotka

Lékařská fakulta

DOI

http://dx.doi.org/10.4172/2161-0665.1000302

Klíčová slova anglicky

CT examination; Filtered back projection; Iterative reconstruction technique; Noise; Radiation dose reduction

Štítky

EL OK

Změněno: 15. 5. 2018 17:30, Soňa Böhmová

Anotace

V originále

To determine whether iterative model-based reconstruction (IMR) technique can preserve computed tomography (CT) image quality when the radiation dose is reduced to 20% of the original value. Methods: CT examination of the neck, mediastinum, or stomach was performed using standard protocols with a Philips Healthcare MDCT 64. Fifty imaging studies were evaluated. The patient’s set was divided into three groups: Young, Preadolescent, and Adult. Four experienced evaluators assessed the CT scans reconstructed using filtered back projection (FBP) and IMR technique (using the L1BR, L2BR, and L2BSP levels) at a 100% dose and at a dose reduced by 80%. The dose was reduced by a decrease in milliampere seconds (mAs). Image noise, artifacts, anatomical details, sharpness, low-contrast resolution, general impression of the reconstructed image, possibility of influencing the description, and possibility of influencing the examination’s conclusion were assessed. FBP at 100% of mAs was always used as the basis for comparison. Decrease in a parameter meant a negative point score while an improvement was marked as positive. Subsequently, objective measurement of image quality was also performed. Results: The greatest improvement in image quality (relative to the quality of images reconstructed using FBP with 100% dose) was achieved using IMR L2BR reconstruction, which can be recommended as optimal. The IMR L2BR reconstruction method was statistically demonstrated to have the best performance among the tested methods in suppressing noise and artifacts. In relation to the selected indications, this method allows a reduction in dose by as much as 80%. The effect of IMR was less marked among the youngest patients than in the remaining two patient groups. Conclusion: The study demonstrated that use of the IMR technique preserves diagnostic indications even with a markedly reduced dose in CT examinations of the neck, thorax, and abdomen in various age groups.

Citovat

ČERVINKOVÁ, Ivana, Petr WALEK, Igor JÍRA, Jarmila SKOTÁKOVÁ, Jan ŠENKYŘÍK, Petr OUŘEDNÍČEK a Jiří JAN. Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique. Pediatrics & Therapeutics. Los Angeles: OMICS International, 2016, roč. 6, č. 4, s. "1000302", 7 s. ISSN 2161-0665. Dostupné z: https://dx.doi.org/10.4172/2161-0665.1000302.

@article{1366710,
   author = {Červinková, Ivana and Walek, Petr and Jíra, Igor and Skotáková, Jarmila and Šenkyřík, Jan and Ouředníček, Petr and Jan, Jiří},
   article_location = {Los Angeles},
   article_number = {4},
   doi = {http://dx.doi.org/10.4172/2161-0665.1000302},
   keywords = {CT examination; Filtered back projection; Iterative reconstruction technique; Noise; Radiation dose reduction},
   language = {eng},
   issn = {2161-0665},
   journal = {Pediatrics & Therapeutics},
   title = {Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique},
   volume = {6},
   year = {2016}
}

TY  - JOUR
ID  - 1366710
AU  - Červinková, Ivana - Walek, Petr - Jíra, Igor - Skotáková, Jarmila - Šenkyřík, Jan - Ouředníček, Petr - Jan, Jiří
PY  - 2016
TI  - Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique
JF  - Pediatrics & Therapeutics
VL  - 6
IS  - 4
SP  - "1000302"
EP  - "1000302"
PB  - OMICS International
SN  - 21610665
KW  - CT examination
KW  - Filtered back projection
KW  - Iterative reconstruction technique
KW  - Noise
KW  - Radiation dose reduction
N2  - To determine whether iterative model-based reconstruction (IMR) technique can preserve computed tomography (CT) image quality when the radiation dose is reduced to 20% of the original value. Methods: CT examination of the neck, mediastinum, or stomach was performed using standard protocols with a Philips Healthcare MDCT 64. Fifty imaging studies were evaluated. The patient’s set was divided into three groups: Young, Preadolescent, and Adult. Four experienced evaluators assessed the CT scans reconstructed using filtered back projection (FBP) and IMR technique (using the L1BR, L2BR, and L2BSP levels) at a 100% dose and at a dose reduced by 80%. The dose was reduced by a decrease in milliampere seconds (mAs). Image noise, artifacts, anatomical details, sharpness, low-contrast resolution, general impression of the reconstructed image, possibility of influencing the description, and possibility of influencing the examination’s conclusion were assessed. FBP at 100% of mAs was always used as the basis for comparison. Decrease in a parameter meant a negative point score while an improvement was marked as positive. Subsequently, objective measurement of image quality was also performed. Results: The greatest improvement in image quality (relative to the quality of images reconstructed using FBP with 100% dose) was achieved using IMR L2BR reconstruction, which can be recommended as optimal. The IMR L2BR reconstruction method was statistically demonstrated to have the best performance among the tested methods in suppressing noise and artifacts. In relation to the selected indications, this method allows a reduction in dose by as much as 80%. The effect of IMR was less marked among the youngest patients than in the remaining two patient groups. Conclusion: The study demonstrated that use of the IMR technique preserves diagnostic indications even with a markedly reduced dose in CT examinations of the neck, thorax, and abdomen in various age groups.
ER  -

ČERVINKOVÁ, Ivana, Petr WALEK, Igor JÍRA, Jarmila SKOTÁKOVÁ, Jan ŠENKYŘÍK, Petr OUŘEDNÍČEK a Jiří JAN. Possibilities of Reducing Radiation Dose in Computed Tomography Examinations in Various Age Groups Using an Iterative Model-Based Reconstruction Technique. \textit{Pediatrics \&{} Therapeutics}. Los Angeles: OMICS International, 2016, roč.~6, č.~4, s.~''1000302'', 7 s. ISSN~2161-0665. Dostupné z: https://dx.doi.org/10.4172/2161-0665.1000302.

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