FIELD: information technology.
SUBSTANCE: invention relates to a magnetic resonance imaging (MRI) system. Magnetic resonance apparatus comprises a body portion, comprising a cavity having first and second ends and one opening situated at one of the first and second end, a cavity defining a longitudinal axis extending between the first and second ends, a corner zone located between the first and second ends and around the cavity and configured to pass a radiation beam, one main magnet for forming the main magnetic field, a cylindrical shimming element forming a cylinder of uniform thickness around the cavity extending between opposite edges along the length of the longitudinal axis of the cavity and overlapping the length of the corner zone, a plurality of discrete shimming elements disposed between the cylindrical shimming element and the first or second end, a cylindrical shimming element and discrete shimming elements are configured to improve the uniformity of the main magnetic field in the cavity.
EFFECT: technical result is the improvement of image quality.
15 cl, 8 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| MEDICAL INSTRUMENT FOR RADIOTHERAPY CONTROLLED BY MAGNETIC RESONANCE IMAGING | 2017 |
|
RU2742501C2 |
| POWER SUPPLY OF COPLANAR RF COIL | 2017 |
|
RU2744714C2 |
| MOTION CONTROL IN LINEAR ACCELERATOR (LINAC) CONTROLLED WITH MRI | 2015 |
|
RU2675678C1 |
| Z-DIRECTION-SEGMENTED RF COIL WITH GAP AND ALTERNATIVE RF SCREEN ELEMENT | 2015 |
|
RU2701787C2 |
| UNIT OF CURRENT-COLLECTING RING | 2011 |
|
RU2591783C2 |
| LINEAR ACCELERATOR DIRECTED BY MAGNETIC RESONANCE | 2013 |
|
RU2631910C2 |
| ALIGNMENT OF COORDINATE SYSTEMS OF EXTERNAL BEAM RADIOTHERAPY AND MAGNETIC RESONANCE IMAGING SYSTEMS | 2014 |
|
RU2677049C2 |
| GRAPHICAL USER INTERFACE FOR MEDICAL INSTRUMENTS | 2013 |
|
RU2634636C2 |
| SHIMMING IRON ELEMENTS FOR A MAGNETIC RESONANCE APPARATUS | 2019 |
|
RU2759083C1 |
| THERAPY SYSTEM CONTAINING MRI MODULE AND MEANS FOR DETERMINING POSITION OF RF COIL | 2015 |
|
RU2683995C2 |
