公开(公告)号：US6011394A

公开(公告)日：2000-01-04

申请号：US908359

申请日：1997-08-07

申请人： Labros S. Petropoulos ,  Clarence E. Payton ,  Michael A. Morich ,  Gordon D. DeMeester

发明人： Labros S. Petropoulos ,  Clarence E. Payton ,  Michael A. Morich ,  Gordon D. DeMeester

IPC分类号： G01R33/385 ,  A61B5/055 ,  G01R33/421 ,  H01F7/20 ,  G01V3/00

CPC分类号： G01R33/4215 ,  G01R33/3856

摘要： A superconducting magnetic imaging apparatus includes a vacuum vessel (16) having a central helium reservoir (20) in which superconducting magnetic coil windings (12) are maintained at a superconducting temperature. The vacuum vessel defines an internal bore (22) within which a self-shielded gradient coil assembly (26) and an RF coil (30) are received. The self-shielded coil assembly includes a single former (50) which defines an imaging region (14) within which an imaged portion of a subject is received. Primary x, y, and z-gradient coils (72-76) are positioned over an RF ground screen (70) that is bonded to the former (50). A number of comb-like spacers (84) extend from the former to supporting shield x, y, and z-gradient coils (110-114). The comb-like spacers define passages between the primary and secondary gradient coils which receive inner and outer cooling tubes (90, 92) and shim tray molds (108). The fully assembled gradient coil assembly is potted to form a unitary structure in a single potting step. The shim tray molds are subsequently removed to define channels or pockets suitable for receiving shim trays (118).

摘要翻译： 超导磁性成像装置包括具有中心氦储存器（20）的真空容器（16），超导磁性线圈绕组（12）保持在超导温度下。 真空容器限定内部孔（22），在其内接收自屏蔽梯度线圈组件（26）和RF线圈（30）。 自屏蔽线圈组件包括限定成像区域（14）的单个成形器（50），在该成像区域内接收被摄体的成像部分。 主x，y和z梯度线圈（72-76）位于结合到前者（50）的RF接地屏（70）上。 多个梳状间隔物（84）从前者延伸到支撑屏蔽x，y和z-梯度线圈（110-114）。 梳状间隔件限定了接收内部和外部冷却管（90,92）和垫片托盘模具（108）的主梯度线圈和次级梯度线圈之间的通道。 完全组装的梯度线圈组件被封装以在单个灌封步骤中形成单一结构。 随后卸下垫片托盘模具以限定适于接收垫片托盘（118）的通道或袋子。