METHOD FOR MAGNETIC RESONANCE IMAGING IN DIAGNOSING OESOPHAGEAL TUMOURS Russian patent published in 2024 - IPC A61B5/55 A61B6/02 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to X-ray diagnostics, and can be used for magnetic resonance imaging in oesophageal tumour. Magnetic resonance imaging of the oesophagus is performed. Eight image sequences are successively obtained and stitched together. Obtained is two-dimensional image T2_VI HASTE with half-filling of K-space in coronal projection without fat suppression, with repetition period of 1,300 ms, time is 91 ms, field of view is 400 mm, slice thickness is 6 mm, gap between slices is 20 %, image matrix is 256×256, and number of slices is 19. Two-dimensional image T2_VI HASTE is obtained with half-filling of K-space in axial projection without fat suppression, with a repetition period of 1,400 ms, time of 94 ms, a field of view of 300 mm, a slice thickness of 6 mm, without a gap between slices, with an image matrix of 320×320, and the number of slices is not less than 35. Two-dimensional image of T2_VI HASTE is obtained with half-filling of K-space in sagittal projection without fat suppression, with repetition period of 1,200 ms, time is 92 ms, field of view is 300 mm, slice thickness is 6 mm, gap between slices is 20 %, image matrix is 256×256, and number of slices is 21. Two-dimensional image of T2_VI HASTE is obtained with half-filling of K-space in axial projection with spectral fat suppression, repetition period 1,400 ms, time is 94 ms, field of view 300 mm, slice thickness is 6 mm, without gap between slices, with image matrix 320×320, and the number of slices is not less than 35. Two-dimensional image of T2-VI TSE is obtained in high resolution and in axial projection along area of interest without fat suppression, with repetition period of 5,000 ms, time is 97 ms, field of view 200 mm, slice thickness is 3 mm, with gap between slices of 10 %, with image matrix of 256×256, and number of slices is 21. Obtaining a two-dimensional diffusion-weighted image with b=50;400;800 in an axial projection with spectral fat suppression, with a repetition period of 3,000 ms, time is 51 ms, a field of view of 380 mm, a slice thickness is 6 mm, with a gap between slices of 20 %, with an image matrix of 134×134, and number of slices is 30. Three-dimensional image T1_VI Gre is obtained before and after contrast enhancement in axial projection with Dixon fat suppression, repetition period 6.8 ms, time is 2.4 ms, field of view 380 mm, slice thickness is 3 mm, with gap between slices 20 %, with image matrix 320×320, and number of slices is 60. Three-dimensional image T1_VI Gre is obtained after contrast enhancement in a sagittal projection with Dixon fat suppression, repetition period of 6.8 ms, time is 2.4 ms, field of view is 380 mm, slice thickness is 3.8 mm, with a gap between slices of 20 %, with an image matrix of 320×320, and number of slices is 40. Dynamic contrast enhancement is performed for the area of interest.

EFFECT: method provides higher quality of visualization of oesophagus in its examination by means of magnetic resonance imaging due to use of declared sequences.

1 cl, 12 dwg, 3 ex