An ergonomie design for 3Tesla MRI neck coil

2016 ◽  
Author(s):  
Daisong Zhang ◽  
Yahya Rahmat-Samii
Keyword(s):  
Neck Coil

Dedicated head-neck coil in MR angiography of the supra-aortic arteries from the aortic arch to the circle of willis

1998 ◽  
Vol 39 (3) ◽  
pp. 249-256 ◽  
Author(s):  
M. Strotzer ◽  
C. Fellner ◽  
S. Fraunhofer ◽  
J. Gmeinwieser ◽  
H. Albrich ◽  
...  
Keyword(s):  
Aortic Arch ◽  
Mr Angiography ◽  
Circle Of Willis ◽  
Neck Coil ◽  
Head Neck

scholarly journals Coiled-coil 1-mediated fastening of the neck and motor domains for kinesin-3 autoinhibition

2018 ◽  
Vol 115 (51) ◽  
pp. E11933-E11942 ◽  
Author(s):  
Jinqi Ren ◽  
Shuang Wang ◽  
Han Chen ◽  
Wenjuan Wang ◽  
Lin Huo ◽  
...  
Keyword(s):  
Coiled Coil ◽  
Underlying Mechanism ◽  
Motor Domain ◽  
Dimer Formation ◽  
Interaction Interface ◽  
Adp Release ◽  
Interdomain Interaction ◽  
Neck Domain ◽  
Neck Coil

In kinesin-3, the coiled-coil 1 (CC1) can sequester the preceding neck coil (NC) for autoinhibition, but the underlying mechanism is poorly understood. Here, we determined the structures of the uninhibited motor domain (MD)-NC dimer and inhibited MD-NC-CC1 monomer of kinesin-3 KIF13B. In the MD-NC-CC1 monomer, CC1 is broken into two short helices that unexpectedly interact with both the NC and the MD. Compared with the MD-NC dimer, the CC1-mediated integration of NC and MD not only blocks the NC dimer formation, but also prevents the neck linker (NL) undocking and the ADP release from the MD. Mutations of the essential residues in the interdomain interaction interface in the MD-NC-CC1 monomer restored the MD activity. Thus, CC1 fastens the neck domain and MD and inhibits both NC and NL. This CC1-mediated lockdown of the entire neck domain may represent a paradigm for kinesin autoinhibition that could be applicable to other kinesin-3 motors.

Dedicated head-neck coil in MR angiography of the supra-aortic arteries from the aortic arch to the circle of willis

1998 ◽  
Vol 39 (3) ◽  
pp. 249-256 ◽  
Author(s):  
M. Strotzer ◽  
C. Fellner ◽  
S. Fraunhofer ◽  
J. Gmeinwieser ◽  
H. Albrich ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Aortic Arch ◽  
Mr Angiography ◽  
High Sensitivity ◽  
Circle Of Willis ◽  
Preoperative Imaging ◽  
Complete Evaluation ◽  
Carotid Siphon ◽  
Neck Coil ◽  
Head Neck

Purpose: To evaluate the usefulness of a dedicated head-neck coil in preoperative imaging of the supra-aortic arteries Material and Methods: Forty consecutive patients with suspected carotid artery stenosis underwent MR angiography (MRA). Using a dedicated head-neck coil, we made a complete evaluation of the supra-aortic arteries and graded the internal carotid artery (ICA) stenoses. MRA was performed at 1.5 T with: coronal 3D FISP from the aortic arch to the circle of Willis; transverse 2D FLASH and 3D TONE of the carotid bifurcation; transverse 3D TONE of the carotid siphon and the circle of Willis; and transverse 3D FISP of the aortic arch. I.a. digital subtraction angiography (DSA) was used as the reference. ICA stenoses of 70% and more at DSA (NASCET methodology) were regarded as severe Results: Severe ICA stenoses were detected with high sensitivity and specificity: 93% and 92% respectively for coronal 3D FISP; 90% and 85% respectively for transverse 2D FLASH; and 97% and 94% respectively for transverse 3D TONE. The carotid siphon and the intracranial ICA were best depicted by 3D TONE. None of the applied sequences gave a satisfactory visualization of the aortic arch or of the origins of the vertebral arteries Conclusion: With the head-neck coil, the supra-aortic arteries (including the intracranial vessels) were visualized without the need to reposition the patient, but depiction of the aortic arch was not acceptable. The quantification of ICA stenoses was reliable

scholarly journals Neck-linker And Neck-coil both contribute to Kinesin Processivity

2009 ◽  
Vol 96 (3) ◽  
pp. 511a
Author(s):  
Shankar Shastry ◽  
William O. Hancock
Keyword(s):  
Neck Coil

5221902 NMR neck coil with passive decoupling

1994 ◽  
Vol 12 (3) ◽  
pp. X-XI
Author(s):  
Randall Jones ◽  
Thomas E Schubert
Keyword(s):  
Neck Coil

scholarly journals Design, Implementation, and Evaluation of a Head and Neck MRI RF Array Integrated with a 511 keV Transmission Source for Attenuation Correction in PET/MR

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3297 ◽  
Author(s):  
Lara ◽  
Frass-Kriegl ◽  
Renner ◽  
Sieg ◽  
Pichler ◽  
...  
Keyword(s):  
Head And Neck ◽  
Attenuation Correction ◽  
Parallel Imaging ◽  
Signal To Noise Ratio ◽  
Rf Coil ◽  
Fully Integrated ◽  
Positron Emission ◽  
Rf Coil Array ◽  
Imaging Performance ◽  
Neck Coil

The goal of this work is to further improve positron emission tomography (PET) attenuation correction and magnetic resonance (MR) sensitivity for head and neck applications of PET/MR. A dedicated 24-channel receive-only array, fully-integrated with a hydraulic system to move a transmission source helically around the patient and radiofrequency (RF) coil array, is designed, implemented, and evaluated. The device enables the calculation of attenuation coefficients from PET measurements at 511 keV including the RF coil and the particular patient. The RF coil design is PET-optimized by minimizing photon attenuation from coil components and housing. The functionality of the presented device is successfully demonstrated by calculating the attenuation map of a water bottle based on PET transmission measurements; results are in excellent agreement with reference values. It is shown that the device itself has marginal influence on the static magnetic field B0 and the radiofrequency transmit field B1 of the 3T PET/MR system. Furthermore, the developed RF array is shown to outperform a standard commercial 16-channel head and neck coil in terms of signal-to-noise ratio (SNR) and parallel imaging performance. In conclusion, the presented hardware enables accurate calculation of attenuation maps for PET/MR systems while improving the SNR of corresponding MR images in a single device without degrading the B0 and B1 homogeneity of the scanner.

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