Tài liệu MRI nguyên lý & ứng dụng pdf

Bs. Leâ Vaên Phöôùc

Ts. Bs.Phaïm Ngoïc Hoa

Khoa Chaån ñoaùn hình aûnh

Beänh vieän Chôï Raãy

NGUYEÂN LYÙ

ÖÙNG DUÏNG

LAÂM SAØNG

NGUYEÂN LYÙ

ÖÙNG DUÏNG

LAÂM SAØNG

Hình coäng höôûng töø (MRI/

Magnetic resonance imaging)

• Hình coäng höôûng töø haït nhaân (NMRI/

Nuclear magnetic resonance

imaging)

MRI

Lòch söû MRI

1940: Felix Block+ Edward Furcell

1971: Raymond Damadian

1972: Hounsfield- CT.

1973: Paul C Lauterbur thu hình aûnh

NMR (cuûa maãu nöôùc).

1977: Damadian thu ñöôïc hình aûnh

NMR cô theå

P.C.Lauterbur P.Mansfield

The 2003 Nobel Prize for Medicine has been awarded to Paul C. Lauterbur,a

physical chemist, and Sir Peter Mansfield, a physicist, for their contributions to

magnetic resonance imaging(MRI). See PC Lauterbur, “Image formation by

induced local interactions: Examples employing nuclear magnetic resonance,”

Nature 242, 190-191(1973) and P Mansfield, “Multiplanar image formation

using NMR spin echoes”, J. Phys C: Solid State Physics 10, L55-L58(1977).

Nam chaâm

Cuoän cheânh (Gradient)

Boä phaän phaùt soùng RF

Boä phaän thu tín hieäu (Antenna)

Heä thoáng xöû lyù, taïo aûnh

Caùc thaønh phaàn maùy MRI

Vónh cöûu (Permanent) [15-20 taán/

0.2 T]

Ñieän trôû (Resistance) [ Nhieät/0,7T]

Sieâu daãn (Superconducting)

[-269

0C/Töø tröôøng cao]

Nam chaâm

Töø tröôøng thaáp ( <0.5Tesla)

Töø tröôøng trung bình (0.5

Æ< 1.0

Tesla)

Töø tröôøng cao (>1.0 Tesla)

Phaân loaïi maùy MRI