A cone-shaped gradient coil design for high-resolution MRI head imaging.

A cone-shaped gradient coil design for high-resolution MRI head imaging.
Phys Med Biol. 2019 Feb 19;:
Authors: Tang F, Hao J, Freschi F, Niu C, Repetto M, Liu F, Crozier S
Abstract
Insertable head gradient coils offer significant advantages such as high gradient strength and fast gradient switching speed owing to close distance to the target region of interest than whole-body cylindrical coils. To produce superior gradient performance, the local head coil is typically designed with an asymmetric configuration to accommodate both the shoulders and head of a patient, leading to tough dimensional constraints and practical limits to the coil implementation. In this paper, we proposed a new cone-shaped model to improve the performance of the asymmetric head coils and also to mitigate patient claustrophobia. The primary coils were designed with a larger diameter at the patient end for access and a smaller diameter at the service end to bring wires closer to the human head, while the secondary coils were arranged on a cylindrical former to improve coil efficiency. Two cases were studied in this paper. (1) case I: inner bore size at the patient end (diameter 42 cm) is fixed as the design reference. In this case, inner diameters at any other position vary with the conical tilting angles. Compared with a set of conical gradient coils designed with tilting angles ranging from 0 to 14 degrees, it is found that the optimal coil performance is ach...

Source: Physics in Medicine and Biology - February 19, 2019 Category: Physics Authors: Tang F, Hao J, Freschi F, Niu C, Repetto M, Liu F, Crozier S Tags: Phys Med Biol Source Type: research