Five element phased array cardiac coil

Manufactured by Philips

Sourced in Netherlands

The Five-element phased array cardiac coil is a specialized piece of lab equipment designed for magnetic resonance imaging (MRI) applications. It is a multi-channel radiofrequency (RF) coil that utilizes a phased array configuration to provide enhanced signal-to-noise ratio and improved image quality for cardiac imaging procedures. The core function of this coil is to transmit and receive the RF signals necessary for acquiring high-quality MRI data from the heart and surrounding structures.

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Lab products found in correlation

Achieva r 3, by Philips (1 mentions) 1.5t scanner, by Philips (1 mentions) Achieva, by Philips (1 mentions)

5 protocols using five element phased array cardiac coil

Comprehensive Aorta Anatomy and Flow MRI

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MRI was done with a whole‐body 1.5 Tesla MR scanner Achieva R 3.2.2.0 using a five‐element cardiac phased‐array coil (Philips Medical System, Best, Netherlands). Anatomy of the aorta was acquired by a navigator‐triggered 3D WH MRI sequence in end diastole. The sequence parameters were: field of view (FOV) 212 × 212 × 121 mm, matrix size 320 × 320, 76 slices, acquired voxel 0.66 × 0.66 × 3.2 mm, reconstructed voxel 0.66 × 0.66 × 1.6 mm, repetition time (TR) 4.0 ms, echo time (TE) 2.0 ms, flip angle (FA) 90 °, and number of signal averages 3. The scan time was ∼8 min.
The 4D flow MRI of thorax was performed using an anisotropic 4D segmented k‐space phase contrast gradient echo sequence with retrospective electrocardiographic gating but without navigator gating of respiratory motion to minimize acquisition time. The sequence parameters were: FOV 180 × 216 × 75 mm, matrix size 100 × 128, 30 slices, acquired voxel 2.5 × 2.5 × 2.5 mm, reconstructed voxel 1.7 × 1.7 × 2.5 mm, TR 3.5 ms, TE 2.2 ms, FA 5 °, 25 reconstructed cardiac phases, velocity encoding 4.0 m/s, and number of signal averages 1. Scan time varied between 9 and 14 min, depending on the size of the patient's chest. The high velocity encoding in all three directions was used to avoid phase wraps in the presence of stenosis forming complex 3D flow.

Mirzaee H., Henn T., Krause M.J., Goubergrits L., Schumann C., Neugebauer M., Kuehne T., Preusser T, & Hennemuth A. (2016). MRI‐based computational hemodynamics in patients with aortic coarctation using the lattice Boltzmann methods: Clinical validation study. Journal of Magnetic Resonance Imaging, 45(1), 139-146.

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Cardiac MRI Velocity Encoding Protocol

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Cardiac MRI examinations were performed using a 1.5 Tesla Achieva R5.1.8. MRI scanner with a five-element cardiac phased-array coil (Philips Medical Systems, Best, The Netherlands). MRI protocols included routine three-dimensional anatomical imaging in end-diastole. The sequence parameters used were: acquired voxel 0.66 × 0.66 × 3.2 mm, reconstructed voxel 0.66 × 0.66 × 1.6 mm, repetition time 40 ms, echo time 2.0 ms, flip angle 90°, number of signal averages 3. Four-dimensional velocity-encoded MRI (4D VEC MRI) was used to capture flow data of the left ventricular outflow tract and the thoracic aorta (acquired voxel 2.5 × 2.5 × 2.5 mm, reconstructed voxel 1.7 × 1.7 × 2.5 mm, repetition time 3.5 msec, echo time 2.2 msec, flip angle 5°, 25 reconstructed cardiac phases, number of signal averages (1). Scan time varied between 9 and 14 minutes, depending on the size of the patient’s chest. High velocity encoding (3–6 m/s) in all three directions was used in order to avoid phase wraps in the presence of the valve stenosis or secondary flow. All flow measurements were completed with automatic correction of concomitant phase errors.

Kelm M., Goubergrits L., Bruening J., Yevtushenko P., Fernandes J.F., Sündermann S.H., Berger F., Falk V., Kuehne T, & Nordmeyer S. (2017). Model-Based Therapy Planning Allows Prediction of Haemodynamic Outcome after Aortic Valve Replacement. Scientific Reports, 7, 9897.

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Fetal Brain MRI Imaging Protocol

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MRI examinations were performed on a 1.5 Tesla system (Philips Medical Systems, Best, The Netherlands) with a five-element, phased-array cardiac coil. No contrast agents or sedation were used.
The MRI protocol included axial, and coronal T2-weighted single-shot fast spin-echo (SSFSE) sequences, and/or steady-state free precession (SSFP) sequences. All sequences were acquired as previously proposed [16] (link) and adjusted according to the changing structural composition of the fetal brain during gestation.

Woitek R., Dvorak A., Weber M., Seidl R., Bettelheim D., Schöpf V., Amann G., Brugger P.C., Furtner J., Asenbaum U., Prayer D, & Kasprian G. (2014). MR-Based Morphometry of the Posterior Fossa in Fetuses with Neural Tube Defects of the Spine. PLoS ONE, 9(11), e112585.

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CMR Imaging with Vasodilator Stress Protocol

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CMR imaging was performed using a 1.5-T scanner (Achieva, Philips, Best, Netherlands) with a five-element phased array cardiac coil. Retrospectively gated cine images were obtained using a steady-state free precession (SSFP) sequence, during approximately 5-second breath holds (repetition time 2.9 msec; echo time 1.5 msec; flip angle 60°; temporal resolution 30–40 msec). Standard long-axis views were obtained, including four-chamber, two-chamber, and three-chamber images. In addition, six to ten short-axis slices were obtained from the LV and RV base to the apex (slice thickness 8mm; gap 2 mm). The cine images were acquired immediately after vasodilator (regadenoson 0.4 mg) first-pass perfusion imaging using 0.5 – 0.1 mmol of gadolinium-based contrast agent was completed. The vasodilator effect was reversed with aminophylline (75 mg). After the cine images were acquired, resting perfusion and late gadolinium enhancement imaging was also performed using standard clinical pulse sequences. The protocol was approved by the Institution Review Board and informed consent was obtained from each patient.

Wang S., Patel H., Miller T., Ameyaw K., Narang A., Chauhan D., Anand S., Anyanwu E., Besser S.A., Kawaji K., Liu X.P., Lang R.M., Mor-Avi V, & Patel A.R. (2021). Fully Automated Artificial Intelligence Algorithms for Cardiac Magnetic Resonance Assessment of Biventricular Function and Left Ventricular Mass: Clinical Significance of Inter-Vendor Variability and Measurement Errors. JACC. Cardiovascular imaging, 15(3), 413-427.

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Vasodilator Stress Perfusion CMR Imaging

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Vasodilator contrast-enhanced stress perfusion CMR imaging was performed using a 1.5-T scanner (Achieva, Philips Healthcare, Best, The Netherlands) with a five-element phased array cardiac coil. Retrospectively gated cine images were obtained following stress perfusion imaging using a balanced steady-state free precession (bSSFP) sequence, during approximately 5-s breath holds (repetition time 2.9 ms; echo time 1.5 ms; flip angle 60°; temporal resolution 30–40 ms). Standard long-axis views were obtained, including four-chamber, two-chamber, and three-chamber images. In addition, six to ten short-axis slices were obtained from the LV and RV base to the apex (slice thickness 8 mm; gap 2 mm).

Wang S., Chauhan D., Patel H., amir-Khalili A., da Silva I.F., Sojoudi A., Friedrich S., Singh A., Landeras L., Miller T., Ameyaw K., Narang A., Kawaji K., Tang Q., Mor-Avi V, & Patel A.R. (2022). Assessment of right ventricular size and function from cardiovascular magnetic resonance images using artificial intelligence. Journal of Cardiovascular Magnetic Resonance, 24, 27.

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