Quantitative Analysis of Motion Artifacts in High-pitch Dual-source Computed Tomography of the Thorax

Schulz, Boris; Jacobi, Volkmar; Beeres, Martin; Bodelle, Boris; Gruber, Tatjana; Lee, Clara; Bauer, Ralf W.; Kerl, Matthias; Vogl, Thomas J.; Zangos, S

doi:10.1097/rti.0b013e3182575729

Cited by 25 publications

(9 citation statements)

References 15 publications

(7 reference statements)

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“…Chest CT imaging can also take advantage from high-pitch scanning and hightemporal resolution scanning modes that have been introduced with the dual-source CT technology. These scanning modes have already been shown to suppress respiratory motion artefacts and dramatically reduce cardiac motion artefacts [6][7][8][9][10][11]. The purpose of the present study was to investigate the reliability of ungated, dual-source CT in detecting and quantifying CAC in a non-selected population of smokers referred for routine chest CT evaluation.…”

Section: Introductionmentioning

confidence: 98%

Coronary calcium screening with dual-source CT: reliability of ungated, high-pitch chest CT in comparison with dedicated calcium-scoring CT

et al. 2015

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Section: Introductionmentioning

confidence: 98%

Coronary calcium screening with dual-source CT: reliability of ungated, high-pitch chest CT in comparison with dedicated calcium-scoring CT

et al. 2015

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“…Artifacts related to CTPA are well recognized, of these are partial volume artifacts secondary to motion/breathing or cardiac pulsation artifacts, poor contrast opacification due to mixing of opacified and un-opacified blood, beam-hardening artifacts by high density structures (like contrast in SVC and right atrium), confusion with venous structures (venous contamination) and mucous-filled bronchi 20,21. In our study, most of the artifacts in each group were related to breathing that limited the evaluation of subsegmental arteries, and beam-hardening artifacts related to residual concentrated contrast along the SVC limiting evaluation of adjacent upper lobe arteries.…”

Section: Discussionmentioning

confidence: 99%

Computed tomography pulmonary angiography using high-pitch dual-source scanner technology

Hassan

Waheed

Sirafy

et al. 2019

SMJ

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Objectives: To compare use of ultra-fast high-pitch dual-source free-breathing computed tomography pulmonary angiogram (CTPA) with conventional standard-pitch single-source breath-hold CTPA. Methods: This retrospective comparative study was conducted in Radiology Department at King Fahad Military Medical Complex Dhahran, Saudi Arabia from July 2016 to December 2017. Patients (N=130) were divided into 2 groups, each having 65 consecutive patients; Group-1 (single-source CT) and Group-2 (dual-source CT). Previously treated pulmonary embolism cases, pregnant patients and those with incomplete data were excluded. Image quality was subjectively assessed by 2 readers for adequacy of contrast opacification and pulmonary vessel outline, and presence of artifacts (breathing motion, cardiac pulsation, and contrast related). Scan acquisition times and radiation doses were also compared. Chi-square and t-test were used to determine association. Results: Improved image quality (optimal studies without artifacts 91%) was seen in Group-2 compared to Group-1 (optimal studies without artifacts 75.4%). Also, reduced scan time (1-2 sec.) and radiation dose (mean dose length product (DLP)-248 mGy-cm) were observed in Group-2 compared to Group-1 (scan time- 6.5 sec, mean DLP-375). Results were found significant ( p <0.05). Conclusion: High-pitch dual-source CT with free-breathing yields better image quality, reduces image acquisition time and radiation doses.

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“…Only one examination from a total of 106 evaluated in this study was deemed to be diagnostically suboptimal for the detection and exclusion of acute PE. The authors believe that the high rates of successful contrast opacification of the pulmonary arterial tree and relative absence of respiratory and other motion artifacts is related to the use of a dual source, high pitch, technique in both SV and RV protocols which substantially reduces scan time and almost fully eradicates motion artifact in CTPA [8], free breathing thoracic CT [22] and in coronary CTA examinations in patients with a heart rate of less than 55bpm [23].…”

Section: Discussionmentioning

confidence: 99%

High pitch, low voltage dual source CT pulmonary angiography: assessment of image quality and diagnostic acceptability with hybrid iterative reconstruction

et al. 2014

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Increased use of CT Pulmonary angiography in suspected pulmonary embolism (PE) has driven research to minimize radiation dose while maintaining image quality and diagnostic accuracy. Following institutional review board approval, we performed a retrospective comparison study in patients with suspected PE. Patients were scanned using an ultra high pitch dual source technique (pitch=2.6) using 120 kV (SVCTPA) (n=54) or 100 kV (RV-CTPA) (n=52). SV-CTPA images were reconstructed using filtered back projection (SV-wFBP) and RV-CTPA images were reconstructed using both FBP (RV-wFBP) and Iterative Reconstruction (RV-IR). Comparison of radiation dose, diagnostic ability, subjective image noise, quality, and sharpness, diagnostic agreement, signal to noise (SNR) and contrast to noise ratios (CNR) were performed. Mean effective dose was 2.56± 0.19 mSv for the RV protocol compared to 5.36±0.60 mSv for the SV. The RV-CTPA protocol resulted in a mean DLP reduction of 52 % and mean CTDI reduction of 51 %. Pulmonary artery SNR and CNR were significantly higher on RV-IR images than SV-wFBP (p=0.007, p=0.003). Mean subjective image noise, quality and sharpness scores did not differ significantly between the SV-wFBP and RVIR images (p>0.05). Subjective quality scores were significantly better for the RV-IR group compared to the RV-wFBP group (p<0.001). Agreement between readers for presence or absence of pulmonary emboli on RV-IR images was almost perfect (κ=0.891, p<0.001). Iterative reconstruction complements ultra high pitch dual source CTPA examinations acquired using a reduced voltage resulting in higher mean pulmonary artery SNR and CNR when compared to both RVwFBP and SV-CTPA.

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Quantitative Analysis of Motion Artifacts in High-pitch Dual-source Computed Tomography of the Thorax

Cited by 25 publications

References 15 publications

Coronary calcium screening with dual-source CT: reliability of ungated, high-pitch chest CT in comparison with dedicated calcium-scoring CT

Coronary calcium screening with dual-source CT: reliability of ungated, high-pitch chest CT in comparison with dedicated calcium-scoring CT

Computed tomography pulmonary angiography using high-pitch dual-source scanner technology

High pitch, low voltage dual source CT pulmonary angiography: assessment of image quality and diagnostic acceptability with hybrid iterative reconstruction

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