Techniques and Applications of Automatic Tube Current Modulation for CT

Kalra, Mannudeep K.; Maher, Michael M.; Toth, Thomas L.; Schmidt, Bernhard; Westerman, Bryan L; Morgan, Helen; Saini, Sanjay

doi:10.1148/radiol.2333031150

Cited by 665 publications

(419 citation statements)

References 18 publications

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“…In the most recent decade, CT manufacturers have developed several techniques for reducing radiation doses, such as automatic tube current modulation or iterative reconstruction algorithms [3][4][5][6]. At the same time, radiologists and medical physicists have published many scientific manuscripts regarding low-dose CT protocols and general dose reduction strategies [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

An education and training programme for radiological institutes: impact on the reduction of the CT radiation dose

et al. 2011

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Objectives To establish an education and training programme for the reduction of CT radiation doses and to assess this programme's efficacy. Methods Ten radiological institutes were counselled. The optimisation programme included a small group workshop and a lecture on radiation dose reduction strategies. The radiation dose used for five CT protocols (paranasal sinuses, brain, chest, pulmonary angiography and abdomen) was assessed using the dose-length product (DLP) before and after the optimisation programme. The mean DLP values were compared with national diagnostic reference levels (DRLs). Results The average reduction of the DLP after optimisation was 37% for the sinuses (180 vs. 113 mGycm, P< 0.001), 9% for the brain (982 vs. 896 mGycm, P<0.05), 24% for the chest (425 vs. 322 mGycm, P<0.05) and 42% for the pulmonary arteries (352 vs. 203 mGycm, P<0.001). No significant change in DLP was found for abdominal CT. The post-optimisation DLP values of the sinuses, brain, chest, pulmonary arteries and abdomen were 68%, 10%, 20%, 55% and 15% below the DRL, respectively. Conclusions The education and training programme for radiological institutes is effective in achieving a substantial reduction in CT radiation dose.

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Section: Introductionmentioning

confidence: 99%

An education and training programme for radiological institutes: impact on the reduction of the CT radiation dose

et al. 2011

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“…However, radiation dose of their results were increasing while using lower tube voltage. This may be attributable to our use of TCM because in this technique the tube current is automatically adjusted in the x and y planes (angular TCM), the z plane (z‐axis TCM), or both [three‐dimensional (3D) TCM] by inputting an appropriate noise value 2, 21. In the angular‐modulation techniques they automatically adjust the tube current for each projection angle to attenuation of the patients to minimize x‐rays in projection angle.…”

Section: Discussionmentioning

confidence: 99%

Relationship between the radiation doses at nonenhanced CT studies using different tube voltages and automatic tube current modulation during anthropomorphic phantoms of young children

Masuda

Funama

Kiguchi

et al. 2017

J Applied Clin Med Phys

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To compare the radiation dose and image noise of nonenhanced CT scans performed at 80, 100, and 120 kVp with tube current modulation (TCM) we used anthropomorphic phantoms of newborn, 1‐year‐old, and 5‐year‐old children. The noise index was set at 12. The image noise in the center of the phantoms at the level of the chest and abdomen was measured within a circumscribed region of interest. We measured the doses in individual tissues or organs with radio‐photoluminescence glass dosimeters for each phantom. Various tissues or organs were assigned and the radiation dose was calculated based on the international commission on radiological protection definition. With TCM the respective radiation dose at tube voltages of 80, 100, and 120 was 29.71, 31.60, and 33.79 mGy for the newborn, 32.00, 36.79, and 39.48 mGy for the 1‐year‐old, and 32.78, 38.11, and 40.85 mGy for the 5‐year‐old phantom. There were no significant differences in the radiation dose among the tube voltages and phantoms (P > 0.05). Our comparison of the radiation dose using anthropomorphic phantoms of young children showed that the radiation dose of nonenhanced CT performed at different tube voltages with TCM was not significantly different.

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“…In helical mode, there is a very precise modulation, performed at every rotation, which reduces the dose by 43% to 66% when compared to acquisitions without modulation on abdominopelvic scans according to Kalra et al [10].…”

Section: Discussionmentioning

confidence: 99%

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

Roy¹,

Quin²,

Labani³

et al. 2017

Radiol Diagn Imaging

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Techniques and Applications of Automatic Tube Current Modulation for CT

Cited by 665 publications

References 18 publications

An education and training programme for radiological institutes: impact on the reduction of the CT radiation dose

An education and training programme for radiological institutes: impact on the reduction of the CT radiation dose

Relationship between the radiation doses at nonenhanced CT studies using different tube voltages and automatic tube current modulation during anthropomorphic phantoms of young children

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

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