Quantitative assessment on coronary computed tomography angiography (CCTA) image quality: comparisons between genders and different tube voltage settings

Chian, Teo Chee; Nassir, Norziana Mat; Ibrahim, Mohd Syahril; Yusof, Ahmad Khairuddin Md; Sabarudin, Akmal

doi:10.21037/qims.2017.02.02

Cited by 4 publications

(4 citation statements)

References 33 publications

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“…Lee et al 2019). In addition, the placement of ROI also affects the result of image quality as mentioned in previous study, in which the placement of ROI is important in obtaining accurate measurements (Chian et al 2017).…”

Section: Discussionmentioning

confidence: 89%

“…Only 4 main vessels evaluated in this study without including segment branches, because ROI measurements were difficult and potentially less accurate for small branches of coronaries arteries (Karaca et al 2007). The ROI size of 5 mm 2 was large enough for adequate pixel sampling and also small enough to affect non-uniformity of CT numbers, and because of that reason, small branches of coronary artery were not included in this objective assessment (Chian et al 2017). Generally, with lower kVp setting, higher image noise will be produced and low contrast resolution will be increased (Feuchtner et al 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The image evaluation system used in this study was following the standard segmentation of 16 segments coronary arteries which consist of left main (LM), proximal left circumflex (pLCX), mid left circumflex (mLCX), distal left circumflex (dLCX), proximal left anterior descending (pLAD), mid left anterior descending (mLAD), distal left anterior descending (dLAD), proximal right coronary (pRCA), mid right coronary (mRCA), and distal right coronary (dRCA) for main segments. Meanwhile, the obtuse marginal 1 (OM1), obtuse marginal 1 (OM2), diagonal 1 (D1), diagonal 2 (D2), right posterior descending artery (R-PDA), and right posterolateral branch (R-PLA) were used for branches segment in line with the guidelines provided by the American Heart Association (Chian et al 2017;Zhang et al 2011)contrast volume and radiation dose at the 100-kilovolt (kV).…”

Section: Image Analysismentioning

confidence: 99%

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Image Quality of Coronary CT Angiography (CCTA) using 640-slice Scanner: Qualitative and Quantitative Assessments of Coronary Arteries Visibility

Shamsul

Sabarudin

2020

JSKM

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The purpose of this study was to evaluate the image quality and diagnostic accuracy of coronary computed tomography angiography (CCTA) using 640-slice scanner. Advancement of multidetector computed tomography (MDCT) technology with higher spatial, temporal resolution, and increasing detector array have improved the image quality and diagnostic accuracy of CCTA. A total of 25 patients (12 men and 13 women) underwent CCTA examination was chosen and data was acquired by 640-slice scanner. All 16 segments of coronary arteries were evaluated by two reviewers using a 4-likert scale for qualitative assessment. In quantitative assessment, the evaluation of 4 main coronary arteries were analysed in terms of signal intensity (SI), image noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR). All 25 patients with a mean age of 52.88 ± 14.75 years old and body mass index (BMI) of 24.24 ± 3.28 kg/m 2 were analysed. In qualitative assessment, from the total of 400 segments, 379 segments (95%) had diagnostic value while 21 segments did not have diagnostic value, which means 5% artefact was detected. In quantitative assessment, there was no statistical differences in gender, race, and BMI (p>0.05). Overall evaluation showed that higher SI at the left main artery (LM) at 393.7 ± 47.19. Image noise was higher at right coronary artery (RCA) at 39.01 ± 13.97. SNR and CNR showed higher at left anterior descending (LAD) with 12.73 ± 5.17 and LM 9.14 ± 4.2, respectively. In conclusion, this study indicates that 640-slice MDCT has higher diagnostic value in CCTA examination with 95% vessel visibility with 5% artefact detection.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Image Analysismentioning

confidence: 99%

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Image Quality of Coronary CT Angiography (CCTA) using 640-slice Scanner: Qualitative and Quantitative Assessments of Coronary Arteries Visibility

Shamsul

Sabarudin

2020

JSKM

Self Cite

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“…This is mostly true in abdominal examination [13], wherever low-contrast areas have hardly and badly impacted via the CNR. Several studies [14][15][16] propose that examination at low tube voltage can be decrease dose without remarkably effecting image quality. In present work aims to study the radiation dose, the image quality and the low-contrast cylinder detectability from MSCT abdomen by using low tube voltage using the American College of Radiology (ACR) phantom.…”

Section: Introductionmentioning

confidence: 99%

Studies on the radiation dose, image quality and low contrast detectability from MSCT abdomen by using low tube voltage

Mokhtar

Aabdelbary

Sarhan

et al. 2021

Egypt J Radiol Nucl Med

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Background To study radiation dose, image quality and low-contrast cylinder detectability from multislice CT (MSCT) abdomen by using low tube voltage using the American College of Radiology (ACR) phantom. The ACR phantom (low-contrast module) was scanned with 64 MSCT scanner (Brilliance, Philips Medical System, Eindhoven, Netherlands) with 80 and 120 KVP, utilizing different tube current time product (mAs) range from 50 to 380 mAs. The image noise (SD), signal to noise ratio, contrast-to-noise ratio (CNR), and scores of low contrast detectability were assessed for every image respectively. Results From images analyses, the noise essentially increased with the use of low tube voltage. The CNR was 0.94 ± 0.27 at 120 KVP, and CNR was 0.43 ± 0.22 at 80 KVP. However, with the same dose, there were no differences of statistical significance in scores of low-contrast detectability between 120 KVP at 300mAs and 80 KVP at (200–380) mAs (p > 0.05). At 300 mAs, the CTDIvol obtained at 80 KVP was about 29% of that at 120 KVP. The CTDIvol obtained at 80 KVP were decreased from 5% at 50 mAs, to 37% at 380 mAs. Conclusions There is a possibility to decrease exposure of radiation virtually by reducing KVP from 120 to 80 KVP in examination of abdominal CT when the high tube current is used, though increasing image noise at low tube voltage.

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The influence of image quality on diagnostic performance of a machine learning–based fractional flow reserve derived from coronary CT angiography

Zhou

et al. 2020

Eur Radiol

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Quantitative assessment on coronary computed tomography angiography (CCTA) image quality: comparisons between genders and different tube voltage settings

Abstract: There were no significant differences in image quality of CCTA between genders and different tube voltages. Lower tube voltage (100 kVp) scanning protocol is recommended in clinical practice to reduce the radiation dose to patient.

Cited by 4 publications

References 33 publications

Image Quality of Coronary CT Angiography (CCTA) using 640-slice Scanner: Qualitative and Quantitative Assessments of Coronary Arteries Visibility

Image Quality of Coronary CT Angiography (CCTA) using 640-slice Scanner: Qualitative and Quantitative Assessments of Coronary Arteries Visibility

Studies on the radiation dose, image quality and low contrast detectability from MSCT abdomen by using low tube voltage

The influence of image quality on diagnostic performance of a machine learning–based fractional flow reserve derived from coronary CT angiography

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