Article
Radiology, Nuclear Medicine & Medical Imaging
Young Joo Suh, Cherry Kim, June-Goo Lee, Hongmin Oh, Heejun Kang, Young-Hak Kim, Dong Hyun Yang
Summary: This study validated an AI-based automatic CAC scoring software on LDCT and found that it showed good to excellent reliability in CAC score and CAC severity categorization, although the reliability varied among different institutions.
EUROPEAN RADIOLOGY
(2023)
Article
Multidisciplinary Sciences
Leening P. Liu, Nadav Shapira, Pooyan Sahbaee, Grace J. Gang, Friedrich D. Knollman, Marcus Y. Chen, Harold I. Litt, Peter B. Noel
Summary: In this study, the stability of spectral results in first-generation clinical dual-source photon-counting CT (PCCT) was evaluated under different heart rates, acquisition modes, and cardiac phases. The results demonstrated consistent spectral results across different acquisition parameters and cardiac phases, highlighting the additional benefit of spectral results in increasing confidence in cardiovascular diagnostics.
SCIENTIFIC REPORTS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Waqas T. Qureshi, Rohit Malhotra, Eric J. Schmidlin, Mohamed Ahmed, Amartya Kundu, Abdul Moiz Hafiz, Jennifer Walker, Nikolaos Kakouros
Summary: The study showed that using fast low-angle shot (FLASH) dual source CT scanning (DS-CTA) could provide lower radiation dose compared to ECG-gated CTA while maintaining image quality, with good consistency in measurements of aortic annular dimensions and vascular structures.
ACADEMIC RADIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Timm Dirrichs, Eric Tietz, Andre Rueffer, Jens Hanten, Thai Duy Nguyen, Ebba Dethlefsen, Christiane K. Kuhl
Summary: This study compares the image quality and radiation dose of ultrahigh-pitch photon-counting CT (PCCT) with that of ultrahigh-pitch dual-source CT (DSCT) in children suspected of having congenital heart defects. The results show that PCCT offers higher signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) and better overall image quality than DSCT at a similar radiation dose.
Article
Instruments & Instrumentation
Wen Qian, Wangyan Liu, Yinsu Zhu, Jun Wang, Yang Chen, Haoyu Meng, Leilei Chen, Yi Xu, Xiaomei Zhu
Summary: The study found that image quality and diagnostic accuracy of CT-derived fractional flow reserve (FFRCT) are affected by heart rate and coronary artery calcium score.
JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY
(2021)
Review
Medicine, General & Internal
Filippo Cademartiri, Antonella Meloni, Laura Pistoia, Giulia Degiorgi, Alberto Clemente, Carmelo De Gori, Vincenzo Positano, Simona Celi, Sergio Berti, Michele Emdin, Daniele Panetta, Luca Menichetti, Bruna Punzo, Carlo Cavaliere, Eduardo Bossone, Luca Saba, Riccardo Cau, Ludovico La Grutta, Erica Maffei
Summary: The photon-counting detector (PCD) is a new technology that provides significant benefits for cardiac and coronary artery imaging. Compared with conventional CT, PCCT has improved capabilities such as multi-energy capability, increased spatial resolution, reduced radiation exposure, and optimized use of contrast agents. It also overcomes limitations of traditional CCT/CCTA, such as reducing artifacts and enabling more precise assessment of stenosis and plaque characteristics. PCCT also has potential applications in characterizing myocardial tissue using a double-contrast agent.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Medicine, General & Internal
Muhammad Taha Hagar, Martin Soschynski, Matthias Benndorf, Thomas Stein, Jana Taron, Christopher L. Schlett, Fabian Bamberg, Tobias Krauss
Summary: This study investigated whether adjusting the scan length of prospectively ECG-triggered CCTA using CAS-CT images can reduce overall radiation doses. The results showed that planning CCTA using CAS-CT led to a shorter scan length and slightly lower effective dose compared to planning via scout view, except for high-pitch spiral CCTA where a slightly opposite effect was observed.
Article
Clinical Neurology
Jiabin Liu, Chen Wang, Qing Li, Xianggong Duan, Xiaolian Zhu, Jiahong Wang, Xiangying Du, Jie Lu, Kuncheng Li
Summary: This study validated the feasibility of using free-breathing, non-gated, high-pitch heart-to-brain CTA in acute ischemic stroke and its ability to show cardiac anatomy. The image quality of CTAs in the heart chambers, carotid arteries, and coronary arteries showed no significant difference between the free-breathing group and the ECG-triggered group. The dose length products of the two groups were also similar. Therefore, free-breathing, non-gated, high-pitch heart-to-brain CTA can be used as an effective method for screening cardiac etiology in acute ischemic stroke patients.
FRONTIERS IN NEUROLOGY
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Konrad Pieszko, Aakash D. Shanbhag, Mark Lemley, Mark Hyun, Serge Van Kriekinge, Yuka Otaki, Joanna X. Liang, Daniel S. Berman, Damini Dey, Piotr J. Slomka
Summary: In this study, we evaluated the inter-scan and inter-reader agreement of coronary calcium (CAC) scores obtained from standard CAC scans and routine ultra-low-dose, ungated CTAC scans during cardiac PET/CT imaging. The results showed good agreement between readers and between the two scan protocols, with higher agreement observed for standard CAC scans. Most discordant readings occurred for scans with low extent of calcification.
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Gogin Nicolas, Mario Viti, Luc Nicodeme, Mickael Ohana, Hugues Talbot, Umit Gencer, Magloire Mekukosokeng, Thomas Caramella, Yann Diascorn, Jean-Yves Airaud, Marc-Samir Guillot, Zoubir Bensalah, Caroline Dam Hieu, Bassam Abdallah, Imad Bousaid, Nathalie Lassau, Elie Mousseaux
Summary: The study developed and evaluated an algorithm using convolutional neural networks to automatically estimate coronary artery calcium from unenhanced ECG-gated cardiac CT. The final model achieved a C-index of 0.951 on the testing set, demonstrating fast, robust, and accurate performance, especially for calcifications in the testing set.
DIAGNOSTIC AND INTERVENTIONAL IMAGING
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Logan R. Smith, Stephen N. Darty, Elizabeth R. Jenista, George L. Gamoneda, David C. Wendell, Clerio F. Azevedo, Michele A. Parker, Raymond J. Kim, Han W. Kim
Summary: This study directly compared the impact of ECG gating on diameter measurements in the same patient for 3D contrast-enhanced MR angiography (CE-MRA), finding that ECG gating resulted in improved image quality and measurement reproducibility, particularly for the evaluation of the ascending aorta.
EUROPEAN RADIOLOGY
(2021)
Article
Computer Science, Artificial Intelligence
Zhaoping Wang, Hongji Yin, Wei Jing, Hui Sun, Ming Ru, Suhua Zhang, Yingcui Wang
Summary: This paper proposes the application research of FFR based on deep learning in the diagnosis of coronary heart disease complicated with diabetes mellitus. Through the core theoretical research on coronary heart disease complicated with diabetes mellitus and FFR, it is analyzed that the existing coronary angiography is still in the development stage and combined with FFR can play a better therapeutic effect.
NEURAL COMPUTING & APPLICATIONS
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Meng-Meng Yu, Wu-Xu Zuo, Xin Zhao, Xiang-Lin Tang, Yin-Yin Chen, Li-Li Dong, Xian-Hong Shu, Hang Jin, Meng-Su Zeng
Summary: This study investigated the prognostic value of coronary CT angiography (CCTA) in heart failure patients with preserved ejection fraction (HFpEF). The results showed a higher prevalence of coronary atherosclerosis in the HFpEF group compared to the non-HFpEF group. During the follow-up period, participants with HFpEF exhibited a higher risk of major adverse cardiovascular events (MACEs) in different CAD-RADS categories. CAD-RADS = 1-2 increased the risk of nonfatal myocardial infarction, while CAD-RADS ≥ 3 were associated with cardiovascular mortality and hospitalization due to heart failure.
EUROPEAN RADIOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
David C. Rotzinger, Salim A. Si-Mohamed, Jerome Yerly, Sara Boccalini, Fabio Becce, Loic Boussel, Reto A. Meuli, Salah D. Qanadli, Philippe C. Douek
Summary: The study demonstrates that VMI outperform conventional CT in terms of accuracy and precision in vitro, while low-keV VMI allows for a 40% iodine dose reduction in vivo while maintaining diagnostic image quality and improving the CNR between lumen versus fat and muscle.
EUROPEAN RADIOLOGY
(2021)
Article
Medicine, General & Internal
Milan Vecsey-Nagy, Adam Levente Jermendy, Marton Kolossvary, Borbala Vattay, Melinda Boussoussou, Ferenc Imre Suhai, Alexisz Panajotu, Judit Csore, Sarolta Borzsak, Daniele Mariastefano Fontanini, Csaba Csobay-Novak, Bela Merkely, Pal Maurovich-Horvat, Balint Szilveszter
Summary: This study compared the amount of motion artifacts in coronary CT angiography images acquired using a dedicated cardiac CT scanner and a conventional multidetector CT scanner. The results showed that the dedicated cardiac CT scanner yielded fewer motion artifacts, allowing for optimal image quality even at high heart rates.
JOURNAL OF CLINICAL MEDICINE
(2022)