TISSUE CHARACTERIZATION BY IMAGE-PROCESSING SUBTRACTION - WINDOWING OF SPECIFIC T(1) VALUES

被引：1

作者：

BONDESTAM, S

LAMMINEN, A

KOMU, M

POUTANEN, VP

ALANEN, A

HALAVAARA, J

机构：

[1] Department of Radiology, Meilahti Hospital, Helsinki University Central Hospital, Helsinki

[2] Department of Diagnostic Radiology, Turku University Central Hospital, Turku

来源：

MAGNETIC RESONANCE IMAGING | 1992年 / 10卷 / 06期

关键词：

MAGNETIC RESONANCE IMAGING; TISSUE CHARACTERIZATION; IMAGE PROCESSING; SUBTRACTION;

D O I：

10.1016/0730-725X(92)90454-8

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A method for windowing specific T1 values is presented. A 1.0 T imager with two routine pulse sequences was employed: A T1-weighted spin echo (SE) sequence and a short tau inversion recovery STIR sequence (fat-suppressed IR). A T1 window for fat was obtained by subtracting the STIR image from the SE image. Negative values were coded black. The method was tested on a normal human thigh, on a human liver with confirmed fatty infiltration, and on the livers of four live burbots. The fat-containing tissues of the two human volunteers were well depicted. The differences in fat concentration among the burbot livers were also clearly shown. The fat intensity seen in the images correlated well with the chemically measured fat concentration. This subtraction method for windowing T1 values proved feasible for fat. The method could be used for tissues with other short T1 values as well.

引用

页码：989 / 995

页数：7

共 11 条

[1]

Dixon, Simple proton spectroscopic imaging, Radiology, 153, pp. 189-194, (1984)

[2]

Rosen, Wedeen, Brady, Selective saturation NMR imaging, J. Comput. Assist. Tomogr., 8, pp. 813-818, (1984)

[3]

Frahm, Haase, Hanicke, Matthaei, Bomsdorf, Helzel, Chemical shift selective MR imaging using a whole-body magnet, Radiology, 156, pp. 441-444, (1985)

[4]

Dwyer, Frank, Sank, Reinig, Hickey, Doppman, Short-T1 inversion-recovery pulse sequence: Analysis and initial experience in cancer imaging, Radiology, 168, pp. 827-836, (1988)

[5]

Bydder, Young, MR imaging: clinical use of the inversion recovery sequence, J. Comput. Assist. Tomogr., 9, pp. 659-675, (1985)

[6]

Alanen, Komu, Bondestam, Toikkanen, Determination of fat content of burbot (Lota lota) liver with low field MR imaging (0.04 T), Phys. Med. Biol., 36, pp. 953-961, (1991)

[7]

Bondestam, Poutanen, Standertskjold-Nordenstam, Personal computer as a low-cost image workstation of MRI, Vienna, Austria: European Congress of Radiology, (1991)

[8]

Beall, Practical methods for biological NMR sample handling, Magn. Res. Imaging., 1, pp. 165-179, (1982)

[9]

Bottomley, Foster, Argesinger, Pfeifer, A review of normal tissue hydrogen NMR relaxation times and relaxation mechanism from 1–100 MHz: Dependence on tissue type, NMR frequency, temperature, species, excision, and age, Med. Phys., 11, pp. 425-448, (1984)

[10]

Lamminen, Tanttu, Sepponen, Suramo, Pihko, Magnetic resonance of diseased skeletal muscle: combined T1 measurement and chemical shift imaging, Brit. J. Radiol., 63, pp. 591-596, (1990)

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