Thoracic Aorta: Motion Artifact Reduction with Retrospective and Prospective Electrocardiography-assisted Multi–Detector Row CT

Roos, Justus E.; Willmann, Jürgen K.; Weishaupt, Dominik; Lachat, Mario; Marinček, Borut; Hilfiker, Paul R.

doi:10.1148/radiol.2221010481

Cited by 207 publications

(126 citation statements)

References 14 publications

Supporting

Mentioning

115

Contrasting

Unclassified

Order By: Relevance

“…aortic valve, aortic root, ascending aorta and coronary ostia), the application of either retrospective or prospective ECG-gating is considered mandatory in order to avoid artifacts caused by cardiac motion [2]. In case of non-diagnostic image quality, retrospectively ECG-gated acquisitions allow for alternate data reconstructions out of any other time point of the cardiac cycle.…”

Section: Introductionmentioning

confidence: 99%

High-pitch dual-source CT angiography of the aortic valve-aortic root complex without ECG-synchronization

et al. 2010

Self Cite

View full text Add to dashboard Cite

Purpose To compare image quality and radiation dose of high-pitch computed tomography angiography(CTA) of the aortic valve-aortic root complex with and without prospective ECG-gating compared to a retrospectively ECG-gated standard-pitch acquisition. Materials and Methods 120 patients(mean age 68 ± 13 years) were examined using a 128-slice dual-source CT system using prospectively ECG-gated high-pitch (group A; n=40), non-ECG-gated high-pitch(group B; n= 40) or retrospectively ECG-gated standard-pitch(C; n=40) acquisition techniques. Image quality of the aortic root, valve and ascending aorta including the coronary ostia was assessed by two independent readers. Image noise was measured, radiation dose estimates were calculated. Results Interobserver agreement was good(κ=0.64-0.78). Image quality was diagnostic in 38/40 patients(group A), 37/40(B) and 38/40(C) with no significant difference in number of patients with diagnostic image quality among all groups (p = 0.56). Significantly more patients showed excellent image quality in group A compared to groups B and C(each, p<0.01). Average image noise was significantly different between all groups(p<0.05). Mean radiation dose estimates in groups A and B(each; 2.4±0.3 mSv) were significantly lower compared to group C(17.5±4.4 mSv; p<0.01). Conclusion High-pitch dual-source CTA provides diagnostic image quality of the aortic valve-aortic root complex even without ECG-gating at 86% less radiation dose when compared to a standard-pitch ECG-gated acquisition.

show abstract

Section: Introductionmentioning

confidence: 99%

High-pitch dual-source CT angiography of the aortic valve-aortic root complex without ECG-synchronization

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, several papers have reported that the thoracic aorta motion artefact for computed tomography angiography of the whole aorta can be reduced by a high pitch mode (DHM) with 128-slice DSCT and an electrocardiogram-gated CT acquisition mode [17][18][19]. However, these special acquisition modes to reduce the motion artefacts are not necessarily available in all CT scanners.…”

Section: Discussionmentioning

confidence: 99%

Temporal resolution measurement of 128-slice dual source and 320-row area detector computed tomography scanners in helical acquisition mode using the impulse method

et al. 2016

View full text Add to dashboard Cite

Purpose: To analyse the temporal resolution (TR) of modern computed tomography (CT) scanners using the impulse method, and assess the actual maximum TR at respective helical acquisition modes.Methods: To assess the actual TR of helical acquisition modes of a 128-slice dual source CT (DSCT) scanner and a 320-row area detector CT (ADCT) scanner, we assessed the TRs of various acquisition combinations of a pitch factor (P) and gantry rotation time (R).Results: The TR of the helical acquisition modes for the 128-slice DSCT scanner continuously improved with a shorter gantry rotation time and greater pitch factor. However, for the 320-row ADCT scanner, the TR with a pitch factor of <1.0 was almost equal to the gantry rotation time, whereas with pitch factor of >1.0, it was approximately one half of the gantry rotation time. The maximum TR values of single-and dual-source helical acquisition modes for the 128-slice DSCT scanner were 0.138 (R/P = 0.285/1.5) and 0.074 s (R/P = 0.285/3.2), and the 2 maximum TR values of the 64 × 0.5-and 160 × 0.5-mm detector configurations of the helical acquisition modes for the 320-row ADCT scanner were 0.120 (R/P = 0.275/1.375) and 0.195 s (R/P = 0.3/0.6), respectively. Conclusion: Because the TR of a CT scanner is not accurately depicted in the specifications of the individual scanner, appropriate acquisition conditions should be determined based on the actual TR measurement.

show abstract

“…зуализации сердца и коронарных артерий [27,28]. Эта же методика в последующем легла в основу качественной визуализации грудной аорты, позволив избежать пульсационных ар-тефактов [15,16,22,24,29,30]. Так, в начале 2000-х была предложена методика двухэтапно-го сканирования всей аорты с переменным питчем, когда грудной отдел сканируется с ЭКГ-синхронизацией, а брюшная часть -в обычном спиральном режиме.…”

Section: Fig 7 Msct Aorta Contrast Enhanced Scanunclassified

Difficulties in Diagnosis and Ways to Optimize Computed Tomography in Acute Aortic Lesions

Muslimov¹,

Zabavskaya²,

Tutova³

2018

Rejr

View full text Add to dashboard Cite

Страница 174 СЛОЖНОСТИ ДИАГНОСТИКИ И ПУТИ ОПТИМИЗАЦИИ КОМПЬЮТЕРНОЙ ТОМОГРАФИИ ПРИ ОСТРЫХ ПОРАЖЕНИЯХ АОРТЫМуслимов Р.Ш., Забавская О.А., Тутова Д.З.омпьютерная томография (КТ) на сегодняшний день является обоснованным методом выбора в диагностике острого аортального синдрома, который вклю-чает в себя ряд потенциально опасных для жизни состояний. Ввиду своей до-ступности, а также высокого временного и пространственного разрешения методика стала незаменимой частью диагностического алгоритма у этой тяжелой кате-гории больных, и на современном этапе имеются данные о высокой точности КТ. В то-же время существует ряд физических и прочих факторов, которые могут влиять на ка-чество получаемых изображений и, соответственно, усложнять диагностику. Одним из таких факторов являются двигательные или пульсационные артефакты, которые в не-которых ситуациях могут приводить к неправильному диагнозу.Задачей данного обзора литературы является описание основных причин диа-гностических ошибок в КТ-диагностике ОАС, так как их понимание, а в последующем устранение является залогом правильного диагноза. В представленном обзоре сделана попытка представить основные причины и факто-ры, оказывающие влияние на качество КТ-изображений, а также способы оптимизации и современные тренды в визуализации аорты с помощью компьютерной томографии.Ключевые слова: острый аортальный синдром, расслоение аорты, компьютерная томография, КТ-аортография, ЭКГ-синхронизация. 8(1):174-184. DOI:10.21569/2222 8(1):174-184. DOI:10.21569/ -7415-2018 DIFFICULTIES IN DIAGNOSIS AND WAYS TO OPTIMIZE COMPUTED TOMOGRAPHY IN ACUTE AORTIC LESIONSMuslimov R.SH., Zabavskaya O.A., Tutova D.Z.omputed tomography (CT) today is a reasonable method of choice in the diagnosis of acute aortic syndrome, which includes a number of potentially life-threatening conditions. Due to its availability, as well as the high temporal and spatial resolution, the technique has become an indispensable part of the diagnostic algorithm in this severe category of patients, and at the present stage there is data on high accuracy of CT. At the same time, there are a number of physical and other factors that can affect the quality of the images, and thus complicate the diagnosis. One of these factors is motions or pulsation artifacts, which may lead to misdiagnosis in some situations. The review presented an attempt to present the main causes and factors influencing the quality of CT-images, as well as ways of optimization and modern trends in the visualization of the aorta with computed tomography.

show abstract

Thoracic Aorta: Motion Artifact Reduction with Retrospective and Prospective Electrocardiography-assisted Multi–Detector Row CT

Cited by 207 publications

References 14 publications

High-pitch dual-source CT angiography of the aortic valve-aortic root complex without ECG-synchronization

High-pitch dual-source CT angiography of the aortic valve-aortic root complex without ECG-synchronization

Temporal resolution measurement of 128-slice dual source and 320-row area detector computed tomography scanners in helical acquisition mode using the impulse method

Difficulties in Diagnosis and Ways to Optimize Computed Tomography in Acute Aortic Lesions

Contact Info

Product

Resources

About