1
|
Masuda T, Kiguchi M, Fujioka C, Oku T, Ishibashi T, Katsunuma Y, Yoshitake T, Abe S, Awai K. Comparison of pediatric lens scattered dose measurements between axial 40-mm and helical 160-mm detector width computed tomography scan modes. Pediatr Radiol 2024; 54:1197-1204. [PMID: 38769141 DOI: 10.1007/s00247-024-05947-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 05/06/2024] [Accepted: 05/06/2024] [Indexed: 05/22/2024]
Abstract
BACKGROUND Reports comparing field lens doses between helical scans with a 40-mm detector width and axial scans with a 160-mm detector width using different computed tomography (CT) scanners are currently scarce. OBJECTIVE To compare scatter doses for lenses between a helical scan with a 40-mm detector width and an axial scan with a 160-mm detector width when using different CT scanners in the context of pediatric chest examinations. MATERIALS AND METHODS Two different CT machines were used: Revolution CT (GE Healthcare, Waukesha, WI) with a 256-row, 0.625-mm multidetector; and Aquilion ONE GENESIS Edition (Canon Medical Systems, Otawara, Japan) with a 320-row, 0.5-mm multidetector. Three pediatric anthropomorphic phantoms were used, with optically stimulated luminescence dosimeters (OSLDs) placed on the left and right lenses. The scatter dose values measured by the OSLDs were compared between a helical scan with a 40-mm detector width and an axial scan with a 160-mm detector width during pediatric chest CT examinations. RESULTS Median equivalent doses for the helical and axial scans were 0.12 and 0.12 mSv/mGy for the newborn, 0.17 and 0.16 mSv/mGy for the 1-year-old, and 0.18 and 0.15 mSv/mGy for the 5-year-old, respectively, when using the Revolution CT. With the Revolution CT, no significant differences were observed in the scatter doses between helical and axial scans in the newborn and 1-year-old phantoms. However, the lens scatter dose for the helical scan was approximately 20-35% higher than that for the axial scan in the 5-year-old phantom (P<0.01). The median equivalent doses of eye lenses for the helical and axial scans were 0.12 and 0.07 mSv/mGy for the newborn, 0.07 and 0.05 mSv/mGy for the 1-year-old, and 0.14 and 0.12 mSv/mGy for the 5-year-old, respectively, when using the Aquilion ONE. With the Aquilion ONE, lens scatter doses for the helical scan were approximately 70%, 40%, and 30% higher in the newborn, 1-year-old, and 5-year-old phantoms, respectively, than those for the axial scan (P<0.01). CONCLUSIONS When using the Aquilion ONE, lens scatter doses for the helical scan were significantly higher in all three phantoms than those for the axial scan. In contrast, when using the Revolution CT, the lens scatter dose for the helical scan was significantly higher in the 5-year-old phantom than that for the axial scan. These results suggest that although scattered doses may vary with respect to the CT scanner and body size, they are generally lower in the case of axial scans.
Collapse
Affiliation(s)
- Takanori Masuda
- Department of Radiological Technology, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, 288, Matsushima, Kurashiki, 701-0193, Okayama, Japan.
| | - Masao Kiguchi
- Department of Radiology, Hiroshima University, Hiroshima, Japan
| | - Chikako Fujioka
- Department of Radiology, Hiroshima University, Hiroshima, Japan
| | - Takayuki Oku
- Department of Radiological Technologist, Tsuchiya General Hospital, Hiroshima, Japan
| | - Toru Ishibashi
- Department of Radiological Technologist, Tsuchiya General Hospital, Hiroshima, Japan
| | - Yasushi Katsunuma
- Department of Radiological Technology, Tokai University Oiso Hospital, Kanagawa, Japan
| | | | - Shuji Abe
- Department of Radiological Technology, Osaka College of High Technology, Osaka, Japan
| | - Kazuo Awai
- Department of Diagnostic Radiology, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
2
|
Masuda T, Kiguchi M, Fujioka C, Oku T, Ishibashi T, Katsunuma Y, Yoshitake T, Abe S, Awai K. Impact of beam collimation of z-overscanning on dose to the lens and thyroid gland in paediatric thoracic computed tomography imaging. Pediatr Radiol 2024; 54:758-763. [PMID: 38308740 DOI: 10.1007/s00247-024-05862-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/17/2024] [Accepted: 01/19/2024] [Indexed: 02/05/2024]
Abstract
BACKGROUND Adaptive collimation reduces the dose deposited outside the imaged volume along the z-axis. An increase in the dose deposited outside the imaged volume (to the lens and thyroid) in the z-axis direction is a concern in paediatric computed tomography (CT). OBJECTIVE To compare the dose deposited outside the imaged volume (to the lens and thyroid) between 40-mm and 80-mm collimation during thoracic paediatric helical CT. MATERIALS AND METHODS We used anthropomorphic phantoms of newborns and 5-year-olds with 40-mm and 80-mm collimation during helical CT. We compared the measured dose deposited outside the imaged volume using optically stimulated luminescence dosimeters (OSLD) at the surfaces of the lens and thyroid and the image noise between the 40-mm and 80-mm collimations. RESULTS There were significant differences in the dose deposited outside the imaged volume (to the lens and thyroid) between the 40-mm and 80-mm collimations for both phantoms (P < 0.01). CONCLUSION Compared with that observed for 80-mm collimation in helical CT scans of the paediatric thorax, the dose deposited outside the imaged volume (to the lens and thyroid) was significantly lower in newborns and 5-year-olds with 40-mm collimation.
Collapse
Affiliation(s)
- Takanori Masuda
- Department of Radiological Technology, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, Matsushima, Kurashiki, Okayama, 288701-0193, Japan.
| | - Masao Kiguchi
- Department of Radiology, Hiroshima University, Hiroshima, Japan
| | - Chikako Fujioka
- Department of Radiology, Hiroshima University, Hiroshima, Japan
| | - Takayuki Oku
- Department of Radiological Technologist, Tsuchiya General Hospital, Hiroshima, Japan
| | - Toru Ishibashi
- Department of Radiological Technologist, Tsuchiya General Hospital, Hiroshima, Japan
| | - Yasushi Katsunuma
- Department of Radiological Technology, Tokai University Oiso Hospital, Kanagawa, Japan
| | | | - Shuji Abe
- Department of Radiological Technology, Osaka College of High Technology, Osaka, Japan
| | - Kazuo Awai
- Department of Diagnostic Radiology, Hiroshima University, Hiroshima, Japan
| |
Collapse
|
3
|
Kim DH, Choi ES, Kwon BS, Yun TJ, Yang DH, Park CS. The Usefulness of Computed Tomography in Predicting Left Ventricular Outflow Tract Obstruction After Neonatal Arch Repair. Semin Thorac Cardiovasc Surg 2023; 35:127-137. [PMID: 35278666 DOI: 10.1053/j.semtcvs.2021.12.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 11/11/2022]
Abstract
This study investigated the outcome after neonatal arch repair, and the usefulness of computed tomography (CT) in predicting the development of left ventricular outflow tract (LVOT) obstruction (LVOTO). A total of 150 neonates who underwent arch repair between 2008 and 2019 were included. The diameters of the aortic valve annulus (AVA) and LVOT in millimeters were measured with transthoracic echocardiography (TTE) or CT and indexed by subtracting body weight in kilograms. The outcomes of interest were the development of LVOTO (peak flow velocity > 3 m/s on TTE) and reintervention or reoperation for LVOTO. The median follow-up duration was 3.6 years. The rates of overall survival, freedom from reintervention for LVOTO, and freedom from the LVOTO development at 7 years were 93.7%, 88.2%, and 81.0%, respectively. In univariable Cox regression analysis, weight-indexed CT-measured LVOT diameter (concordance index [C-index] = 0.73, P = 0.002) and weight-indexed TTE-measured AVA diameter (C-index = 0.69, P = 0.001) were significant predictors of LVOTO. The maximal chi-square test identified the following cutoff values for predicting LVOTO: 1.4 for weight-indexed CT-measured LVOT diameter and 1.6 for weight-indexed TTE-measured AVA diameter. The high-risk group (both measures lower than the cutoff values) had a significantly lower rate of freedom from LVOTO development than the low-risk group (both measures higher than the cutoff values) (P < 0.001). The weight-indexed CT-measured LVOT diameter could be used to predict LVOTO development after neonatal arch repair, as an independent measure or complementary to traditional measures.
Collapse
Affiliation(s)
- Dong-Hee Kim
- Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Eun Seok Choi
- Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Bo Sang Kwon
- Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Tae-Jin Yun
- Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Dong Hyun Yang
- Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Chun Soo Park
- Division of Pediatric Cardiac Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
| |
Collapse
|
4
|
Xu C, Xu M, Yan J, Li YY, Yi Y, Guo YB, Wang M, Li YM, Jin ZY, Wang YN. The impact of deep learning reconstruction on image quality and coronary CT angiography-derived fractional flow reserve values. Eur Radiol 2022; 32:7918-7926. [PMID: 35596780 DOI: 10.1007/s00330-022-08796-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 03/20/2022] [Accepted: 04/03/2022] [Indexed: 01/03/2023]
Abstract
OBJECTIVES To explore the impact of deep learning reconstruction (DLR) on image quality and machine learning-based coronary CT angiography (CTA)-derived fractional flow reserve (CT-FFRML) values. METHODS Thirty-three consecutive patients with known or suspected coronary artery disease who underwent coronary CTA and subsequent invasive coronary angiography were enrolled. DLR was compared with filtered back projection (FBP), statistical-based iterative reconstruction (SBIR), model-based iterative reconstruction (MBIR) Cardiac, and MBIR Cardiac sharp for objective image qualities of coronary CTA. Invasive fractional flow reserve (FFR) and quantitative flow ratio (QFR) were used as the reference standards. The diagnostic performances of different reconstruction approach-based CT-FFRML were calculated. RESULTS A total of 182 lesions in 33 patients were enrolled for analysis. The image quality of DLR was superior to the others. There were no significant differences in the CT-FFRML values among these five approaches (all p > 0.05). Of the 182 lesions, 17 had invasive FFR results, and 70 had QFR results. Using FFR as a reference, MBIR Cardiac, MBIR Cardiac sharp, and DLR achieved equal diagnostic performance, slightly higher than the other reconstruction approaches (MBIR Cardiac, MBIR Cardiac sharp, and DLR: AUC = 0.82, FBP and AIDR: AUC = 0.78, all p > 0.05). Using QFR as a reference, the AUCs of FBP, SBIR, MBIR Cardiac, MBIR Cardiac sharp, and DLR were 0.83, 0.81, 0.86, 0.84, and 0.83, respectively (all p > 0.05). CONCLUSIONS Our study showed that the DLR algorithm improved image quality, but there were no significant differences in the CT-FFRML values and diagnostic performance among different reconstruction approaches. KEY POINTS • Deep learning-based image reconstruction (DLR) improves the image quality of coronary CTA. • CT-FFRML values and diagnostic performance of DLR revealed no significant differences compared to other reconstruction approaches.
Collapse
Affiliation(s)
- Cheng Xu
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Min Xu
- Canon Medical System, Beijing, 100015, China
| | - Jing Yan
- Canon Medical System, Beijing, 100015, China
| | - Yan-Yu Li
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Yan Yi
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Yu-Bo Guo
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Ming Wang
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Yu-Mei Li
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Zheng-Yu Jin
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China
| | - Yi-Ning Wang
- Department of Radiology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.1, Shuaifuyuan, Dongcheng District, Beijing, 100730, China.
| |
Collapse
|
5
|
Baş S, Alkara U, Aliyev B. Evaluation of complex congenital heart disease with prospective ECG-gated cardiac CT in a single heartbeat at low tube voltage (70 kV) and adaptive statistical iterative reconstruction in infants: a single center experience. Int J Cardiovasc Imaging 2021; 38:413-422. [PMID: 34487310 DOI: 10.1007/s10554-021-02390-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 08/21/2021] [Indexed: 10/20/2022]
Abstract
The purpose of this study is to evaluate the radiation dose, image quality, and diagnostic accuracy of prospective ECG-gated cardiac CT at 70 kV and adaptive statistical iterative reconstruction (ASIR), with a single source, 512 slice MDCT in the diagnosis of complex congenital heart disease in infants. We retrospectively evaluated 47 infants (ages 1 day to 353 days) with prospective ECG-gated cardiac CT that was performed on a single source 512 slice CT at low tube voltage (70 kV) using a wide detector aperture, adaptive statistical iterative reconstruction algorithm (ASIR), and specific reconstruction software reducing coronary motion artifacts (SnapShot Freeze). All cardiac images were obtained during the first pass of contrast material through the anatomic structures of interest and the targets for the center of the acquisition window were set 45% of the R-R interval during one cardiac cycle without sedation and breath-hold. The median effective dose measured in our study was 0.64 ± 0.16 mSv. The average subjective overall image quality score was 4.34 ± 0.31 (range 3-5). For the determination of objective image quality, Mean Noise (HU), SNR, and CNR values emerged as 20.8, 28.7(for pulmonary artery), and 27.1, respectively. Diagnostic accuracy was 100% for the main purposes for the main clinical indication. During cardiac CT examination, pathologies in addition to cardiac anomalies were found in 9/47 of cases (7 severe airway obstructions,1 posterior diaphragmatic hernia, 1 vertebral anomaly). Prospective ECG-gated cardiac CT scan at 70 kV and ASIR in infants with complex CHD provides low radiation dose (submillisievert) in a single heartbeat with a good objective and subjective image quality. It also provides important benefits in the diagnosis of additional pathology.
Collapse
Affiliation(s)
- Serap Baş
- Gaziosmanpaşa Hospital, Department of Radiology, Istanbul Yeni Yuzyil University, Merkez Mah. Çukurçeşme Cad. No:51 Gaziosmapaşa, 34245, Istanbul, Turkey.
| | - Utku Alkara
- Gaziosmanpaşa Hospital, Department of Radiology, Istanbul Yeni Yuzyil University, Merkez Mah. Çukurçeşme Cad. No:51 Gaziosmapaşa, 34245, Istanbul, Turkey
| | - Bahruz Aliyev
- Gaziosmanpaşa Hospital, Department of Pediatric Cardiology, Istanbul Yeni Yuzyil University, Istanbul, Turkey
| |
Collapse
|
6
|
Yamasaki Y, Kamitani T, Sagiyama K, Matsuura Y, Hida T, Nagata H. Model-based iterative reconstruction for 320-detector row CT angiography reduces radiation exposure in infants with complex congenital heart disease. ACTA ACUST UNITED AC 2021; 27:42-49. [PMID: 33290239 DOI: 10.5152/dir.2020.19633] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE We investigated the impact of model-based iterative reconstruction (MBIR) on 320-detector row computed tomography angiography (CTA) in infants with complex congenital heart disease (CHD). METHODS Seventy infants with complex CHD who underwent 320-detector row CTA (40 boys and 30 girls; age range, 0-22 months; median age, 60 days) were retrospectively evaluated. First, the images were reconstructed by filtered back projection (FBP), hybrid iterative reconstruction (HIR), or MBIR in 20 cases, and variables were compared among the three iterative reconstruction methods (IR test). Second, the variables were compared between 25 cases scanned using HIR and 25 cases scanned using MBIR, with a 20 standard deviation noise level for both. Attenuation values and contrast-to-noise ratios (CNRs) of the great vessels and heart chambers were calculated. Total dose-length products were recorded for all patients (radiation dose: RD test). RESULTS In the IR test, the mean CNR values were 4.8±1.3 for FBP, 6.9±1.4 for HIR, and 8.2±1.7 for MBIR (P < 0.0001). The best subjective image qualities in the great vessels and heart chambers were obtained with MBIR. In RD testing, no significant differences between HIR and MBIR in image quality (CNR: HIR, 8.4±2.4; MBIR, 8.3±2.4) were observed. The effective dose was significantly lower for MBIR than for HIR (0.7±0.2 vs. 1.1±0.3 mSv; P < 0.001). CONCLUSION The MBIR algorithm significantly improved image quality and decreased radiation exposure in 320-row CTA of infants with complex CHD, providing an alternative to FBP or HIR that is both safer and produces better results.
Collapse
Affiliation(s)
- Yuzo Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takeshi Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koji Sagiyama
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Yuko Matsuura
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tomoyuki Hida
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hazumu Nagata
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| |
Collapse
|
7
|
Forward-projected Model-based Iterative Reconstruction SoluTion in Temporal Bone Computed Tomography: A Comparison Study of All Reconstruction Modes. J Comput Assist Tomogr 2021; 45:308-314. [PMID: 33186178 DOI: 10.1097/rct.0000000000001119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Identify appropriate reconstruction modes of Forward-projected model-based Iterative Reconstruction SoluTion (FIRST) in temporal bone computed tomography (CT) and investigate the contribution of spatial resolution and noise to the visual assessment. METHODS Sixteen temporal bone CT images were reconstructed. Two blinded radiologists assessed 8 anatomical structures and classified the visual assessment. These visual scores were compared across reconstruction modes among each anatomical structure. Visual scores and contrast-to-noise ratio, noise power spectrum (NPS) at low (NPSLow) and high (NPSHigh) spatial frequencies, and 50% modulation transfer function relationships were evaluated. RESULTS Visual scores differed significantly for the stapedius muscle and osseous spiral lamina, with CARDIAC SHARP, BONE, and LUNG modes for the osseous spiral lamina scoring highest. Visual scores significantly positively correlated with NPSLow, NPSHigh, and 50% modulation transfer function but negatively with contrast-to-noise ratio. CONCLUSIONS Modes providing higher spatial resolution and lower noise reduction showed an improved visual assessment of CT images reconstructed with FIRST.
Collapse
|
8
|
Warin Fresse K, Isorni MA, Dacher JN, Pontana F, Gorincour G, Boddaert N, Jacquier A, Raimondi F. Cardiac computed tomography angiography in the paediatric population: Expert consensus from the Filiale de cardiologie pédiatrique et congénitale (FCPC) and the Société française d'imagerie cardiaque et vasculaire diagnostique et interventionnelle (SFICV). Arch Cardiovasc Dis 2020; 113:579-586. [PMID: 32522436 DOI: 10.1016/j.acvd.2020.03.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 12/30/2022]
Abstract
This paper aims to provide a paediatric cardiac computed tomography angiography expert panel consensus based on the opinions of experts from the Société française d'imagerie cardiaque et vasculaire diagnostique et interventionnelle (SFICV) and the Filiale de cardiologie pédiatrique congénitale (FCPC). This expert panel consensus includes recommendations for indications, patient preparation, computed tomography angiography radiation dose reduction techniques and postprocessing techniques. We think that to realize its full potential and to avoid pitfalls, cardiac computed tomography angiography in children with congenital heart disease requires training and experience. Moreover, paediatric cardiac computed tomography angiography protocols should be standardized to acquire optimal images in this population with the lowest radiation dose possible, to prevent unnecessary radiation exposure. We also provide a suggested structured report and a list of acquisition protocols and technical parameters in relation to specific vendors.
Collapse
Affiliation(s)
- Karine Warin Fresse
- Imagerie cardiovasculaire fédération des cardiopathies congénitales, CHU de Nantes HGRL, 44093 Nantes, France
| | - Marc Antoine Isorni
- Unité de radiologie diagnostique et thérapeutique, hôpital Marie-Lannelongue, 92350 Le Plessis Robinson, France
| | - Jean Nicolas Dacher
- Cardiac MR/CT Unit, University Hospital, 76031 Rouen, France; Inserm U1096, UFR Médecine-Pharmacie, 76183 Rouen, France
| | - François Pontana
- Inserm UMR 1011, Department of Cardiovascular Radiology, EGID (European Genomic Institute for Diabetes), université de Lille, Institut Cœur-Poumon, Institut Pasteur de Lille, CHU de Lille, FR3508, 59000 Lille, France
| | - Guillaume Gorincour
- Image(2), institut méditerranéen d'imagerie médicale appliquée à la gynecologie, grossesse et enfance, 13008 Marseille, France
| | - Nathalie Boddaert
- Paediatric Radiology Unit, Hôpital Universitaire Necker-Enfants Malades, 75743 Paris, France
| | - Alexis Jacquier
- Department of Radiology, University of Marseille Méditerranée, CHU La Timone, Marseille, France
| | - Francesca Raimondi
- Unité médicochirurgicale de cardiologie congénitale et pédiatrique, centre de référence des maladies cardiaques congénitales complexes (M3C), hôpital universitaire Necker-Enfants-Malades, 149, rue de Sèvres, 75743 Paris cedex 15, France.
| |
Collapse
|
9
|
Kikuchi N, Yanagawa M, Enchi Y, Nakayama A, Yoshida Y, Miyata T, Hata A, Tsubamoto M, Honda O, Tomiyama N. The effect of the reconstruction algorithm for the pulmonary nodule detection under the metal artifact caused by a pacemaker. Medicine (Baltimore) 2020; 99:e20579. [PMID: 32541487 PMCID: PMC7302625 DOI: 10.1097/md.0000000000020579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The aim was to compare the effects of metal artifacts from a pacemaker on pulmonary nodule detection among computed tomography (CT) images reconstructed using filtered back projection (FBP), single-energy metal artifact reduction (SEMAR), and forward-projected model-based iterative reconstruction solution (FIRST).Nine simulated nodules were placed inside a chest phantom with a pacemaker. CT images reconstructed using FBP, SEMAR, and FIRST were acquired at low and standard dose, and were evaluated by 2 independent radiologists.FIRST demonstrated the most significantly improved metal artifact and nodule detection on low dose CT (P < .0032), except at 10 mA and 5-mm thickness. At standard-dose CT, SEMAR showed the most significant metal artifact reduction (P < .00001). In terms of nodule detection, no significant differences were observed between FIRST and SEMAR (P = .161).With a pacemaker present, FIRST showed the best nodule detection ability at low-dose CT and SEMAR is comparable to FIRST at standard dose CT.
Collapse
Affiliation(s)
- Noriko Kikuchi
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| | - Masahiro Yanagawa
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| | - Yukihiro Enchi
- Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita
| | - Akiko Nakayama
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| | - Yuriko Yoshida
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| | - Tomo Miyata
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| | - Akinori Hata
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| | - Mitsuko Tsubamoto
- From the Department of Radiology, Kansai Medical University, Hirakata City, Osaka, Japan
| | - Osamu Honda
- From the Department of Radiology, Kansai Medical University, Hirakata City, Osaka, Japan
| | - Noriyuki Tomiyama
- From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city
| |
Collapse
|
10
|
Warin-Fresse K, Isornii MA, Dacher JN, Pontana F, Gorincour G, Boddaert N, Jacquier A, Raimondi F. Pediatric cardiac computed tomography angiography: Expert consensus from the Filiale de Cardiologie Pédiatrique et Congénitale (FCPC) and the Société Française d'Imagerie Cardiaque et Vasculaire diagnostique et interventionnelle (SFICV). Diagn Interv Imaging 2020; 101:335-345. [PMID: 32029386 DOI: 10.1016/j.diii.2020.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/11/2020] [Accepted: 01/15/2020] [Indexed: 02/06/2023]
Abstract
This article was designed to provide a pediatric cardiac computed tomography angiography (CCTA) expert panel consensus based on opinions of experts of the Société Française d'Imagerie Cardiaque et Vasculaire diagnostique et interventionnelle (SFICV) and of the Filiale de Cardiologie Pédiatrique Congénitale (FCPC). This expert panel consensus includes recommendations for indications, patient preparation, CTA radiation dose reduction techniques, and post-processing techniques. The consensus was based on data from available literature (original papers, reviews and guidelines) and on opinions of a group of specialists with extensive experience in the use of CT imaging in congenital heart disease. In order to reach high potential and avoid pitfalls, CCTA in children with congenital heart disease requires training and experience. Moreover, pediatric cardiac CCTA protocols should be standardized to acquire optimal images in this population with the lowest radiation dose possible to prevent unnecessary radiation exposure. We also provided a suggested structured report and a list of acquisition protocols and technical parameters in relation to specific vendors.
Collapse
Affiliation(s)
- K Warin-Fresse
- Department of Cardiovascular Imaging, CHU Nantes HGRL, 44093 Nantes, France
| | - M-A Isornii
- Department of Radiology, Hôpital Marie Lannelongue, 92350 Le Plessis-Robinson, France
| | - J-N Dacher
- Department of Radiology, Rouen University Hospital, 76031 Rouen, France; Inserm U1096, UFR Médecine-Pharmacie, University of Rouen, 76000 Rouen, France
| | - F Pontana
- Department of Cardiovascular Radiology, Institut Cœur-Poumon, CHU Lille, INSERM UMR 1011, Institut Pasteur de Lille, EGID, FR3508, Univ Lille, 59000 Lille, France
| | - G Gorincour
- Image2, Mediterranean Institute of Medical Imaging, 13008 Marseille, France
| | - N Boddaert
- Pediatric Radiology Unit, Hôpital Universitaire Necker Enfants-Malades, 75015 Paris, France; Université de Paris, Descartes-Paris 5, 75006 Paris, France
| | - A Jacquier
- Department of Radiology, University of Marseille Méditerranée, CHU la Timone, 13000 Marseille, France
| | - F Raimondi
- Unité Médicochirurgicale de Cardiologie Congénitale et Pédiatrique, Centre de Référence des Maladies Cardiaques Congénitales Complexes - M3C, Hôpital Universitaire Necker Enfants-Malades, 75015 Paris, France.
| |
Collapse
|
11
|
Comparison of image quality between synthetic and patients' electrocardiogram-gated 320-row pediatric cardiac computed tomography. Pediatr Radiol 2020; 50:180-187. [PMID: 31853572 DOI: 10.1007/s00247-019-04541-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 06/26/2019] [Accepted: 09/20/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND Pediatric cardiac computed tomography (CT) can be acquired without electrode placement by using synthetic electrocardiogram (ECG). OBJECTIVE To determine whether the depiction of gross cardiac structures and coronary arteries in 320-row pediatric CT is not inferior when CT is gated with synthetic ECG at 150 beats per minute (bpm), compared to the patients' own ECG. MATERIALS AND METHODS Sixty 320-row CT examinations performed in children younger than 3 years old with congenital cardiac anomaly were enrolled in this retrospective study. Thirty examinations were scanned using the children's own ECG for gating and 30 examinations were scanned using synthetic ECG at 150 bpm. The image quality was compared between the two gating modes using a 3-point scale to delineate the following anatomical structures: atrial septum, ventricular septum, right atrium, right ventricle, left atrium, left ventricle, main pulmonary artery, ascending aorta, aortic arch including the patent ductus arteriosus, descending aorta, right coronary artery and left main trunk. Beam-hardening artifacts from contrast enhancement material were evaluated using a 3-point scale, and the overall image quality was evaluated using a 5-point scale. RESULTS Synthetic ECG was not inferior to the patients' ECG in depicting each structure, beam-hardening artifact and overall image quality. Average indices were clinically acceptable imaging quality, except for subjective image quality of mid and distal coronary arteries. CONCLUSION Pediatric cardiac CT in patients younger than 3 years old can be acquired using synthetic ECG gating, with image quality not inferior to the patients' ECG.
Collapse
|
12
|
Hong SH, Goo HW, Maeda E, Choo KS, Tsai IC. User-Friendly Vendor-Specific Guideline for Pediatric Cardiothoracic Computed Tomography Provided by the Asian Society of Cardiovascular Imaging Congenital Heart Disease Study Group: Part 1. Imaging Techniques. Korean J Radiol 2019; 20:190-204. [PMID: 30672159 PMCID: PMC6342752 DOI: 10.3348/kjr.2018.0571] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 09/30/2018] [Indexed: 12/13/2022] Open
Abstract
Optimal performance of pediatric cardiothoracic computed tomography (CT) is technically challenging and may need different approaches for different types of CT scanners. To meet the technical demands and improve clinical standards, a practical, user-friendly, and vendor-specific guideline for pediatric cardiothoracic CT needs to be developed for children with congenital heart disease (CHD). In this article, we have attempted to describe such guideline based on the consensus of experts in the Asian Society of Cardiovascular Imaging CHD Study Group. This first part describes the imaging techniques of pediatric cardiothoracic CT, and it includes recommendations for patient preparation, scan techniques, radiation dose, intravenous injection protocol, post-processing, and vendor-specific protocols.
Collapse
Affiliation(s)
- Sun Hwa Hong
- Department of Radiology, Mediplex Sejong Hospital, Incheon, Korea
| | - Hyun Woo Goo
- Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
| | - Eriko Maeda
- Department of Radiology, The University of Tokyo, Tokyo, Japan
| | - Ki Seok Choo
- Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine, Busan, Korea
| | - I Chen Tsai
- Congenital Heart Disease Study Group Member of the Asian Society of Cardiovascular Imaging, Taiwan
| | | |
Collapse
|
13
|
Nakagawa M, Ozawa Y, Nomura N, Inukai S, Shiba A, Sakurai K, Shimohira M, Shibamoto Y. Investigation of an appropriate contrast-enhanced CT protocol for young patients following the Fontan operation. Jpn J Radiol 2018; 36:215-222. [PMID: 29327115 DOI: 10.1007/s11604-018-0718-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 12/26/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE Children with congenital heart diseases (CHDs) may need to be followed up with contrast-enhanced CT following the Fontan operation because complications such as the occlusion of conduits may occur. The purpose of the present study was to develop an adequate contrast-enhanced CT protocol for children with CHD following the Fontan operation. MATERIALS AND METHODS Between July 2012 and July 2017, 29 CT examinations for 26 patients aged 2-11 years (median 5 years) with CHD following the Fontan operation were performed using dual-source CT. A non-ionized contrast medium was injected through the dorsum manus vein. Scanning began 60 or 70 s after the start of the injection. The delayed phase was randomly selected to be 60 s in 14 cases and 70 s in 15 cases. We evaluated the enhancement of conduits following the Fontan operation at delayed phases. RESULTS The CT numbers of conduits at 60 and 70 s were 185 ± 46 and 185 ± 31 HU, respectively (P = 0.97). CONCLUSION In contrast-enhanced CT for children after the Fontan operation, both of the delayed phases (60 and 70 s) appeared to be adequate for evaluating intraconduit patency.
Collapse
Affiliation(s)
- Motoo Nakagawa
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan.
| | - Yoshiyuki Ozawa
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Norikazu Nomura
- Department of Cardiovascular Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Sachiko Inukai
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Ayano Shiba
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Keita Sakurai
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Masashi Shimohira
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yuta Shibamoto
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| |
Collapse
|