CT support of cardiac structural interventions

Hell, Michaela M.; Achenbach, Stephan

doi:10.1259/bjr.20180707

Cited by 12 publications

(3 citation statements)

References 105 publications

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“…Dimension assessment of the LAA based on the CMR at the identical landing zone as the XR-derived measurements showed high congruency indicating potential support of CMR for preprocedural planning. The significant differences in maximal diameters between CMR and XR are likely caused by the limited spatial resolution in CMR and non-optimal XR angulation as also previously reported in the context of preprocedural planning for LAAc based on CTA (13,23,44). This assumption was supported by the correlation of the ovality of the LAA with the deviation between the two modalities.…”

Section: Discussionsupporting

confidence: 68%

Cardiac magnetic resonance imaging for preprocedural planning of percutaneous left atrial appendage closure

Bertsche

Metze

Luo

et al. 2023

Front. Cardiovasc. Med.

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IntroductionPercutaneous closure of the left atrial appendage (LAA) facilitates stroke prevention in patients with atrial fibrillation. Optimal device selection and positioning are often challenging due to highly variable LAA shape and dimension and thus require accurate assessment of the respective anatomy. Transesophageal echocardiography (TEE) and x-ray fluoroscopy (XR) represent the gold standard imaging techniques. However, device underestimation has frequently been observed. Assessment based on 3-dimensional computer tomography (CTA) has been reported as more accurate but increases radiation and contrast agent burden. In this study, the use of non-contrast-enhanced cardiac magnetic resonance imaging (CMR) to support preprocedural planning for LAA closure (LAAc) was investigated.MethodsCMR was performed in thirteen patients prior to LAAc. Based on the 3-dimensional CMR image data, the dimensions of the LAA were quantified and optimal C-arm angulations were determined and compared to periprocedural data. Quantitative figures used for evaluation of the technique comprised the maximum diameter, the diameter derived from perimeter and the area of the landing zone of the LAA.ResultsPerimeter- and area-based diameters derived from preprocedural CMR showed excellent congruency compared to those measured periprocedurally by XR, whereas the respective maximum diameter resulted in significant overestimation (p < 0.05). Compared to TEE assessment, CMR-derived diameters resulted in significantly larger dimensions (p < 0.05). The deviation of the maximum diameter to the diameters measured by XR and TEE correlated well with the ovality of the LAA. C-arm angulations used during the procedures were in agreement with those determined by CMR in case of circular LAA.DiscussionThis small pilot study demonstrates the potential of non-contrast-enhanced CMR to support preprocedural planning of LAAc. Diameter measurements based on LAA area and perimeter correlated well with the actual device selection parameters. CMR-derived determination of landing zones facilitated accurate C-arm angulation for optimal device positioning.

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Section: Discussionsupporting

confidence: 68%

Cardiac magnetic resonance imaging for preprocedural planning of percutaneous left atrial appendage closure

Bertsche

Metze

Luo

et al. 2023

Front. Cardiovasc. Med.

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“…La TC se ha consolidado en la evaluación y planificación del procedimiento TAVI por el detalle anatómico que logra, y de esta forma predice los resultados e identifica los potenciales riesgos de complicaciones que deban solventarse (6) . La altura de los ostium coronarios (<12 mm) y el diámetro de senos de Valsalva (<28 mm) son ya conocidos factores de riesgo de oclusión coronaria en los procedimientos de TAVI (7) .…”

Section: Discussionunclassified

Stent en chimenea en intervención de implante valvular transcateter “Valve in Valve"

Martinez Gomez,

Figueroa Gómez,

Gómez de Diego

2023

Rev Ecocar Pract (RETIC)

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El implante de válvula Aortica transcateter (TAVI) se ha convertido en una opcion de tratamiento útil en muchos casos de disfunción de bioprótesis aortica debido a que muchos de estos pacientes tienen un riesgo quirúrgico elevado. La evaluación con Tomografía Cardiaca (TC) permite identificar criterios de susceptibilidad y condiciones de riesgo, como es el riesgo de oclusión coronaria en el implante. La técnica de protección con stent conocida “stent en Chimenea” permite realizar de forma segura la intervención evitando el riesgo de obstrucción coronaria, como mostramos en el siguiente caso donde presentamos los resultados del estudio de control con TC después del procedimiento.

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“…Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) are imaging modalities widely used to obtain structural information of small anatomical structures in vivo for diagnosis and preoperative planning due to the highresolution volumetric 3-D images they produce [2][3][4][5][6][7][8] . Several 3-D CT HuBMAP atlases, such as the kidney with substructure and eye atlases from Lee et al [9][10][11] , the pancreas atlas from Zhou et al 12 , and the gut cell atlas 13,14 have been released in an organ specific manner.…”

Section: Introductionmentioning

confidence: 99%

Characterizing Low-cost Registration for Photographic Images to Computed Tomography

Kim,

Lee,

Ramadass

et al. 2023

Preprint

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Mapping information from photographic images to volumetric medical imaging scans is essential for linking spaces with physical environments, such as in image-guided surgery. Current methods of accurate photographic image to computed tomography (CT) image mapping can be computationally intensive and/or require specialized hardware. For general purpose 3-D mapping of bulk specimens in histological processing, a cost-effective solution is necessary. Here, we compare the integration of a commercial 3-D camera and cell phone imaging with a surface registration pipeline. Using surgical implants and chuck-eye steak as phantom tests, we obtain 3-D CT reconstruction and sets of photographic images from two sources: Canfield Imaging's H1 camera and an iPhone 14 Pro. We perform surface reconstruction from the photographic images using commercial tools and open-source code for Neural Radiance Fields (NeRF) respectively. We complete surface registration of the reconstructed surfaces with the iterative closest point (ICP) method. Manually placed landmarks were identified at three locations on each of the surfaces. Registration of the Canfield surfaces for three objects yields landmark distance errors of 1.747, 3.932, and 1.692 mm, while registration of the respective iPhone camera surfaces yields errors of 1.222, 2.061, and 5.155 mm. Photographic imaging of an organ sample prior to tissue sectioning provides a low-cost alternative to establish correspondence between histological samples and 3-D anatomical samples.

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CT support of cardiac structural interventions

Cited by 12 publications

References 105 publications

Cardiac magnetic resonance imaging for preprocedural planning of percutaneous left atrial appendage closure

Cardiac magnetic resonance imaging for preprocedural planning of percutaneous left atrial appendage closure

Stent en chimenea en intervención de implante valvular transcateter “Valve in Valve"

Characterizing Low-cost Registration for Photographic Images to Computed Tomography

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