KR-102961614-B1 - SYSTEMS AND METHODS FOR PERFORMING MAGNETIC RESONANCE IMAGING

KR102961614B1KR 102961614 B1KR102961614 B1KR 102961614B1KR-102961614-B1

Abstract

According to various embodiments, a magnetic resonance imaging system is provided. According to various embodiments, the system comprises a housing, and the housing has a front, a permanent magnet for providing a static magnetic field, a radio frequency transmitting coil, and at least one set of gradient coils. According to various embodiments, the radio frequency transmitting coil and at least one set of gradient coils are positioned in close proximity to the front. According to various embodiments, the radio frequency transmitting coil and at least one set of gradient coils are configured to generate an electromagnetic field in a region of interest. According to various embodiments, the permanent magnet has an aperture penetrating the center of the permanent magnet. According to various embodiments, the region of interest is located outside the front.

Inventors

나세브 알렉산다르
알가린 귀사도 호세 미구엘
말릭 풀킷
동 홍리
드 마토스 고메즈 뮬러 프랜시스
아티비라 라마 판디안 사바레쉬
쿠마르 디네쉬
놀테 존
나라야난 람

Assignees

프로맥소 인크.

Dates

Publication Date: 20260508
Application Date: 20200224
Priority Date: 20190222

Claims (13)

As a magnetic resonance imaging system, Includes housing, The above housing is, front, Permanent magnet for providing a static magnetic field, A radio frequency transmitting coil located on the front surface, and A single-sided gradient coil set located on the front surface above Includes, The magnetic resonance imaging system described above is a cross-sectional magnetic resonance imaging system comprising a bore having an opening positioned around a central region of the front surface, and The above permanent magnet has an aperture that is coaxial with the bore and penetrates the center of the permanent magnet, and The above radio frequency transmitting coil has a central region coaxial with the above bore, and The above-described cross-section gradient coil set comprises a plurality of gradient coils arranged around a central region of the cross-section gradient coil set, wherein the central region is coaxial with the bore, and The above radio frequency transmitting coil and the above cross-sectional gradient coil set are positioned close to the front surface, and The above magnetic resonance imaging system is, An electromagnet configured to generate a field that is added to or subtracted from the static magnetic field; radio frequency receiving coil; and everyone A system further comprising, wherein the power source is configured to generate an electromagnetic field in a region of interest by causing current to flow through at least one of the radio frequency transmitting coil, the cross-sectional gradient coil set, or the electromagnet, and the region of interest is located outside the front and near the opening of the bore.
A system according to claim 1, wherein the front surface is a concave surface.
A system according to claim 1, wherein the static magnetic field of the permanent magnet is in the range of 1 mT to 1 T.
A system according to claim 1, wherein the radio frequency transmitting coil comprises a first ring and a second ring connected through one or more capacitors and/or one or more runs.
In paragraph 4, the system wherein the first ring and the second ring are arranged coaxially with each other.
A system according to claim 1, wherein the radio frequency transmitting coil is non-planar and oriented to partially surround the region of interest.
A system according to claim 1, wherein the cross-sectional gradient coil set is non-planar and oriented to partially surround the region of interest, and the cross-sectional gradient coil set is configured to project a magnetic field gradient onto the region of interest.
A system according to claim 1, wherein the cross-sectional gradient coil set comprises one or more first helical coils in a first position and one or more second helical coils in a second position, and the first position and the second position are positioned opposite each other around the central region of the cross-sectional gradient coil set.
A system according to claim 1, wherein the magnetic resonance imaging system is configured to provide a rise time of less than 10 μs to the cross-sectional gradient coil set.
A system according to claim 1, wherein the electromagnet is configured to change the static magnetic field of the permanent magnet within the region of interest.
A system according to claim 1, wherein the radio frequency receiving coil is a flexible coil configured to be attached to an anatomical part of a patient for imaging within the region of interest.
In claim 1, the radio frequency receiving coil is one of a single-loop coil configuration, a figure-8 coil configuration, or a butterfly coil configuration, and the coil is smaller than the region of interest, in a system.
A system according to claim 1, wherein the radio frequency transmitting coil and the cross-sectional gradient coil set are concentric around the region of interest.

Description

Systems and methods for performing magnetic resonance imaging Magnetic resonance imaging (MRI) systems have focused primarily on utilizing a sealed form factor. This form factor involves enclosing the imaging area with electromagnetic field generating materials and imaging system components. A typical MRI system includes a cylindrical bore magnet in which the patient is placed inside a tube of magnets for imaging. Accordingly, components such as radio frequency (RF) transmit (TX) and receive (RX) coils, gradient coils, and permanent magnets are positioned to generate the magnetic field required inside the tube to image the patient. Therefore, most current MRI systems suffer from numerous drawbacks, some of which are provided below. First, the footprint of these systems is substantial, often requiring them to be housed in hospitals or external imaging centers. Second, enclosed MRI systems make interventions (image-guided interventions such as MRI-guided biopsies, treatment planning, robotic surgery, and radiation therapy) significantly more difficult. Third, as is the case with most current MRI systems, the placement of the primary magnetic components discussed above to virtually surround the patient severely restricts patient movement, often causing panic among patients inside the MRI system and creating additional burdens when placing or removing the patient from the imaging area. In other current MRI systems, the patient is placed between two large plates to alleviate some of the physical constraints on patient placement. Nevertheless, there is a need to provide state-of-the-art imaging configurations in next-generation MRI systems to reduce the footprint and allow for office MRI procedures across various regions of interest. There is also a need to provide MRI system designs that allow for various image-guided interventions. Furthermore, there is a need to provide MRI system designs that enhance the patient experience and enable easy patient scanning. According to various embodiments, a magnetic resonance imaging system is provided. According to various embodiments, the system comprises a housing, and the housing has a front, a permanent magnet for providing a static magnetic field, a radio frequency transmitting coil, and a single-sided gradient coil set. According to various embodiments, the radio frequency transmitting coil and the single-sided gradient coil set are positioned in close proximity to the front. According to various embodiments, the system comprises an electromagnet, a radio frequency receiving coil, and a power source. According to various embodiments, the power source is configured to generate an electromagnetic field in a region of interest by causing current to flow through at least one of the radio frequency transmitting coil, the single-sided gradient coil set, or the electromagnet. According to various embodiments, the region of interest is located outside the front. According to various embodiments, a magnetic resonance imaging system is provided. According to various embodiments, the system comprises a housing, and the housing has a concave front surface, a permanent magnet for providing a static magnetic field, a radio frequency transmitting coil, and at least one set of gradient coils. According to various embodiments, the radio frequency transmitting coil and at least one set of gradient coils are positioned in proximity to the concave front surface. According to various embodiments, the radio frequency transmitting coil and at least one set of gradient coils are configured to generate an electromagnetic field in a region of interest. According to various embodiments, the region of interest is located outside the concave front surface. According to various embodiments, the system comprises a radio frequency receiving coil for detecting a signal in the region of interest. According to various embodiments, a method for performing magnetic resonance imaging is provided. The method comprises the steps of inputting patient parameters into a magnetic resonance imaging system - the system comprises a housing - the housing comprises a front, a permanent magnet for providing a static magnetic field, a radio frequency transmitting coil, and a cross-sectional gradient coil set - the radio frequency transmitting coil and the cross-sectional gradient coil set are positioned in close proximity to the front -; an electromagnet; a radio frequency receiving coil; and a power supply - the power supply is configured to generate an electromagnetic field in a region of interest by flowing current through at least one of the radio frequency transmitting coil, the cross-sectional gradient coil set, or the electromagnet, and the region of interest is located outside the front -; executing a patient positioning protocol including executing at least one first scan; executing at least one second scan; reviewing at least one second scan; and determining at least one path for performing a biopsy based on