Radiation dose and image quality with abdominal computed tomography with automated dose-optimized tube voltage selection

Hu, Lirong; Wang, Yujun; Hou, Hongyan; Wei, Fuquan; Yang, Guoren; Chen, Yougeng

doi:10.1177/0300060513496173

Cited by 13 publications

(7 citation statements)

References 22 publications

(34 reference statements)

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“…The data was collected to assess the image quality and radiation dose in multidetector CT with two groups: the first group at 120 kVp and the second group used automated attenuation-based tube potential optimisation mode (CARE kV). The t-test results determined that CARE kV reduced the radiation dose level without a significant difference in image quality between the two groups [14].…”

Section: Use Of Statistical Analysis To Evaluate Image Quality In Litmentioning

confidence: 93%

“…According to a review in 2014 [14], a statistical analysis using SPSS software was used to determine the mean and standard deviation to express the image noise (SD). The authors used independent t test samples to compare the significance of the quality of CT images between the data presented as mean ± SD.…”

Section: Use Of Statistical Analysis To Evaluate Image Quality In Litmentioning

confidence: 99%

“…Therefore, DECT presents more advantages to improve image quality in comparison with SECT, including the correction of the beam-hardening artifact, reduction in the radiation dose level and increase of the diagnostic content [2]. In addition, DECT developed additional techniques, such as the reduction in the number of slices and virtual non-enhanced images techniques, for reducing the radiation dose level while increasing the image quality [3].Image noise impacts the image quality in CT images. This appears as an irregular granular pattern that degrades image quality.…”

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confidence: 99%

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Effect of slice thickness on image noise and diagnostic content of single-source-dual energy computed tomography

Alshipli

Kabir

2017

J. Phys.: Conf. Ser.

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Abstract.Computed tomography (CT) employs X-ray radiation to create cross-sectional images. Dual-energy CT acquisition includes the images acquired from an alternating voltage of X-ray tube: a low-and a high-peak kilovoltage. The main objective of this study is to determine the best slice thickness that reduces image noise with adequate diagnostic information using dual energy CT head protocol. The study used the ImageJ software and statistical analyses to aid the medical image analysis of dual-energy CT. In this study, ImageJ software and F-test were utilised as the combination methods to analyse DICOM CT images. They were used to investigate the effect of slice thickness on noise and visibility in dual-energy CT head protocol images. Catphan-600 phantom was scanned at different slice thickness values; .6, 1, 2,3,4,5 and 6 mm, then quantitative analyses were carried out. The DECT operated in helical mode with another fixed scan parameter values. Based on F-test statistical analyses, image noise at 0.6, 1, and 2 mm were significantly different compared to the other images acquired at slice thickness of 3, 4, 5, and 6 mm. However, no significant differences of image noise were observed at 3, 4, 5, and 6 mm. As a result, better diagnostic image value, image visibility, and lower image noise in dual-energy CT head protocol was observed at a slice thickness of 3 mm. IntroductionComputed tomography scan (CT) is a cross-sectional medical imaging technology introduced in 1972 by British engineer Godfrey Hounsfield. Computed tomography is the first radiologic modality that requires the use of computers to scan the internal organ of the body. This technology creates data depending on the different attenuation levels of the scanned area [1]. CT is classified according to the type of energy technology; the classifications are single-(SECT) and dual-energy CT (DECT). DECT provides two different attenuation levels (low and high) that construct two data sets for the same scanned area. Therefore, DECT presents more advantages to improve image quality in comparison with SECT, including the correction of the beam-hardening artifact, reduction in the radiation dose level and increase of the diagnostic content [2]. In addition, DECT developed additional techniques, such as the reduction in the number of slices and virtual non-enhanced images techniques, for reducing the radiation dose level while increasing the image quality [3].Image noise impacts the image quality in CT images. This appears as an irregular granular pattern that degrades image quality. Image noise is based on the standard deviation of pixel intensity values or CT number for uniform anatomical region. Although DECT improves image quality, it still has approximately the same or slightly lower image noise level compared with single-energy CT [4,5]. Despite the thinner slices increased the image noise, the image visibility of a small lesion has been improved by provide more diagnostic information. As a result, a balance between the change in slice

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Section: Use Of Statistical Analysis To Evaluate Image Quality In Litmentioning

confidence: 93%

Section: Use Of Statistical Analysis To Evaluate Image Quality In Litmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of slice thickness on image noise and diagnostic content of single-source-dual energy computed tomography

Alshipli

Kabir

2017

J. Phys.: Conf. Ser.

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“…Penelitian tentang dosis efektif pada pasien yang mengalami eksaminasi CT bagian perut (abdomen) ataupun digantikan dengan phantom telah dilakukan oleh peneliti sebelumnya [2,7,15,16,17] Dosis efektif adalah paparan radiasi yang diterima pasien selama menjalani eksaminasi CT-Scan. Hasil perhitungan menunjukkan bahwa dosis efektif rata-rata adalah 5,52 mSv pada pasien laki-laki dan 4,97 mSv pada pasien perempuan.…”

Section: Latar Belakangunclassified

Estimasi Dosis Efektif Pasien Bagian Abdomen dari Hasil Pemeriksaan CT-Scan Merek Siemens SOMATOM

Ibrahim¹,

Abdullah²,

Halide³

2018

Positron

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Penelitian ini bertujuan untuk menghitung dosis efektif yang diterima pasien yang mengalami eksaminasi CT pada bagian perut (abdomen). Data yang digunakan pada penelitian ini adalah data pasien yang dikumpulkan dari Departemen Radiologi di salah satu rumah sakit di Makassar dan merupakan hasil eksaminasi CT-Scan Simens tipe SOMATOM bagian abdomen 80 pasien. Hasil penelitian menunjukkan bahwa nilai rata-rata CTDIvol dan dosis efektif yang diterima pasien laki-laki masing-masing 7,87 mGy dan 5,52 mSv, sedangkan untuk pasien perempuan masing-masing 7,53 mGy dan 4,97 mSv Dosis yang diterima pasien tersebut masih dalam ambang batas yang telah ditetapkan oleh BAPETEN.

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“…CT automatic exposure control (AEC) is commonly used for chest, abdomen, and pelvis CT exams. AEC systems adjust the tube current (and on some systems the tube voltage) to accommodate differences in patient size, both from patient to patient and within a single patient acquisition, in order to simplify the task of obtaining adequate image quality without the use of excessive radiation dose …”

Section: Introductionmentioning

confidence: 99%

A suggested method for setting up GSI profiles on the GE Revolution CT scanner

Gauntt

2019

J Applied Clin Med Phys

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Radiation dose and image quality with abdominal computed tomography with automated dose-optimized tube voltage selection

Cited by 13 publications

References 22 publications

Effect of slice thickness on image noise and diagnostic content of single-source-dual energy computed tomography

Effect of slice thickness on image noise and diagnostic content of single-source-dual energy computed tomography

Estimasi Dosis Efektif Pasien Bagian Abdomen dari Hasil Pemeriksaan CT-Scan Merek Siemens SOMATOM

A suggested method for setting up GSI profiles on the GE Revolution CT scanner

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