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Manohar A, Yang J, Pack JD, Ho G, McVeigh ER. Motion correction of wide-detector 4DCT images for cardiac resynchronization therapy planning. J Cardiovasc Comput Tomogr 2024; 18:170-178. [PMID: 38242778 PMCID: PMC11087942 DOI: 10.1016/j.jcct.2024.01.007] [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: 10/16/2023] [Revised: 12/11/2023] [Accepted: 01/07/2024] [Indexed: 01/21/2024]
Abstract
BACKGROUND Lead placement at the latest mechanically activated left ventricle (LV) segments is strongly correlated with response to cardiac resynchronization therapy (CRT). We demonstrate the feasibility of a cardiac 4DCT motion correction algorithm (ResyncCT) in estimating LV mechanical activation for guiding lead placement in CRT. METHODS Subjects with full cardiac cycle 4DCT images acquired using a wide-detector CT scanner for CRT planning/upgrade were included. 4DCT images exhibited motion artifact-induced false-dyssynchrony, hindering LV mechanical activation time estimation. Motion-corrupted images were processed with ResyncCT to yield motion-corrected images. Time to onset of shortening (TOS) was estimated in each of 72 endocardial segments. A false-dyssynchrony index (FDI) was used to quantify the extent of motion artifacts in the uncorrected and the ResyncCT images. After motion correction, the change in classification of LV free-wall segments as optimal target sites for lead placement was investigated. RESULTS Twenty subjects (70.7 ± 13.9 years, 6 female) were analyzed. Motion artifacts in the ResyncCT-processed images were significantly reduced (FDI: 28.9 ± 9.3 % vs 47.0 ± 6.0 %, p < 0.001). In 10 (50 %) subjects, ResyncCT motion correction yielded statistically different TOS estimates (p < 0.05). Additionally, 43 % of LV free-wall segments were reclassified as optimal target sites for lead placement after motion correction. CONCLUSIONS ResyncCT significantly reduced motion artifacts in wide-detector cardiac 4DCT images, yielded statistically different time to onset of shortening estimates, and changed the location of optimal target sites for lead placement. These results highlight the potential utility of ResyncCT motion correction in CRT planning when using wide-detector 4DCT imaging.
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Affiliation(s)
- Ashish Manohar
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, CA, USA; Department of Radiology, Stanford University, Stanford, CA, USA; Cardiovascular Institute, Stanford University, Stanford, CA, USA
| | - James Yang
- Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Jed D Pack
- Radiation Systems Lab, GE Global Research, Niskayuna, New York, USA
| | - Gordon Ho
- Department of Medicine, Division of Cardiology, University of California San Diego, La Jolla, CA, USA
| | - Elliot R McVeigh
- Department of Bioengineering, University of California San Diego, La Jolla, CA, USA; Department of Medicine, Division of Cardiology, University of California San Diego, La Jolla, CA, USA; Department of Radiology, University of California San Diego, La Jolla, CA, USA.
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Gerrits W, Danad I, Velthuis B, Mushtaq S, Cramer MJ, van der Harst P, van Slochteren FJ, Meine M, Suchá D, Guglielmo M. Cardiac CT in CRT as a Singular Imaging Modality for Diagnosis and Patient-Tailored Management. J Clin Med 2023; 12:6212. [PMID: 37834855 PMCID: PMC10573271 DOI: 10.3390/jcm12196212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/16/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023] Open
Abstract
Between 30-40% of patients with cardiac resynchronization therapy (CRT) do not show an improvement in left ventricular (LV) function. It is generally known that patient selection, LV lead implantation location, and device timing optimization are the three main factors that determine CRT response. Research has shown that image-guided CRT placement, which takes into account both anatomical and functional cardiac properties, positively affects the CRT response rate. In current clinical practice, a multimodality imaging approach comprised of echocardiography, cardiac magnetic resonance imaging, or nuclear medicine imaging is used to capture these features. However, with cardiac computed tomography (CT), one has an all-in-one acquisition method for both patient selection and the division of a patient-tailored, image-guided CRT placement strategy. This review discusses the applicability of CT in CRT patient identification, selection, and guided placement, offering insights into potential advancements in optimizing CRT outcomes.
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Affiliation(s)
- Willem Gerrits
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Ibrahim Danad
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Birgitta Velthuis
- Department of Radiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Saima Mushtaq
- Department of Perioperative Cardiology and Cardiovascular Imaging, Centro Cardiologico Monzino IRCCS, Via Parea 4, 20138 Milan, Italy
| | - Maarten J. Cramer
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Pim van der Harst
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Frebus J. van Slochteren
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
- CART-Tech BV, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Mathias Meine
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Dominika Suchá
- Department of Radiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Marco Guglielmo
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
- Department of Cardiology, Haga Teaching Hospital, Els Borst-Eilersplein 275, 2545 AA The Hague, The Netherlands
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Chen Z, Contijoch F, Kahn AM, Kligerman S, Narayan HK, Manohar A, McVeigh E. Myocardial Regional Shortening from 4D Cardiac CT Angiography for the Detection of Left Ventricular Segmental Wall Motion Abnormality. Radiol Cardiothorac Imaging 2023; 5:e220134. [PMID: 37124646 PMCID: PMC10141330 DOI: 10.1148/ryct.220134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 01/22/2023] [Accepted: 01/30/2023] [Indexed: 05/02/2023]
Abstract
Purpose To investigate whether endocardial regional shortening computed from four-dimensional (4D) CT angiography (RSCT) can be used as a decision classifier to detect the presence of left ventricular (LV) wall motion abnormalities (WMAs). Materials and Methods One hundred electrocardiographically gated cardiac 4D CT studies (mean age, 59 years ± 14 [SD]; 61 male patients) conducted between April 2018 and December 2020 were retrospectively evaluated. Three experts labeled LV wall motion in each of the 16 American Heart Association (AHA) segments as normal or abnormal; they also measured peak RSCT across one heartbeat in each segment. The data set was split evenly into training and validation groups. During training, interchangeability of RSCT thresholding with experts to detect WMA was assessed using the individual equivalence index (γ), and an optimal threshold of the peak RSCT (RSCT*) that achieved maximum agreement was identified. RSCT* was then validated using the validation group, and the effect of AHA segment-specific thresholds was evaluated. Agreement was assessed using κ statistics. Results The optimal threshold, RSCT* of -0.19, when applied to all AHA segments, led to high agreement (agreement rate = 92.17%, κ = 0.82) and interchangeability with experts (γ = -2.58%). The same RSCT* also achieved high agreement in the validation group (agreement rate = 90.29%, κ = 0.76, γ = -0.38%). The use of AHA segment-specific thresholds (range: 0.16 to -0.23 across AHA segments) slightly improved agreement (1.79% increase). Conclusion RSCT thresholding was interchangeable with expert visual analysis in detecting segmental WMA from 4D CT and may be used as an objective decision classifier.Keywords: CT, Left Ventricle, Regional Endocardial Shortening, Wall Motion Abnormality Supplemental material is available for this article. © RSNA, 2023.
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Affiliation(s)
- Zhennong Chen
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
| | - Francisco Contijoch
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
| | - Andrew M. Kahn
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
| | - Seth Kligerman
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
| | - Hari K. Narayan
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
| | - Ashish Manohar
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
| | - Elliot McVeigh
- From the Departments of Bioengineering (Z.C., F.C., E.M.) and
Mechanical and Aerospace Engineering (A.M.), UC San Diego School of Engineering,
La Jolla, Calif; and Departments of Radiology (F.C., S.K., E.M.), Cardiology
(A.M.K., E.M.), and Pediatrics (H.K.N.), UC San Diego School of Medicine, 9452
Medical Dr, La Jolla, CA 92037
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