Trajectory guide frame for MRI-guided surgeries

摘要

An MRI-guided interventional system for use with a patient and an interventional device includes a base, a trajectory guide frame, and a mounting device. The base is configured to be secured to a body of the patient. The trajectory guide frame includes a targeting cannula. The targeting cannula has an elongate guide bore extending axially therethrough, defining a trajectory axis, and being configured to guide placement of the interventional device. The trajectory guide frame is operable to move the targeting cannula relative to the base to position the trajectory axis to a desired intrabody trajectory to guide placement of the interventional device in vivo. A plurality of patient engagement structures are provided on the base and are configured to penetrate tissue of the body and to space the base apart from the tissue. The system further includes a plurality of fasteners configured to secure the base to the body.

主权项

1. An MRI-guided interventional system configured for use with a head of a patient, the head having a skull covered by a scalp, the system comprising:
an interventional device; a base configured to be secured to the head of the patient; a trajectory guide frame including a targeting cannula, the targeting cannula being mounted on the base, having an elongate guide bore extending axially therethrough, defining a trajectory axis, and being configured to guide placement of the interventional device, wherein the trajectory guide frame is operable to move the targeting cannula relative to the base to position the trajectory axis to a desired intrabody trajectory to guide placement of the interventional device in vivo; a plurality of patient engagement structures on the base configured to penetrate the scalp and to space the base apart from the scalp, each of the patient engagement structures having a distal tip adapted to engage the head; and a plurality of screws configured to be screwed into the skull to secure the base to the head; wherein the system is configured to allow an extension length of at least one of the patient engagement structures to be selectively adjusted such that the distal tip of the patient engagement structure penetrates the scalp but is not screwed into the skull, the extension length being the length of the patient engagement structure extending from the base to the distal tip, whereby the patient engagement structures serve to space the base apart from the skull and stabilize the base on the skull; and wherein each of the patient engagement structures includes a pin including a non-threaded spacer section extending to the distal tip.