• 제목/요약/키워드: MR angiography

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The Principles of MR Angiography

  • 장용민
    • 대한자기공명의과학회:학술대회논문집
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    • 대한자기공명의과학회 2000년도 춘계학술대회 제4차 심포지움
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    • pp.59-70
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    • 2000

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Neck and Cerebral MR Angiography

  • 서정진
    • 대한자기공명의과학회:학술대회논문집
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    • 대한자기공명의과학회 2000년도 춘계학술대회 제4차 심포지움
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    • pp.78-87
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    • 2000

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복합 [$90^{\circ}-{\tau}-180^{\circ}-2{\tau}-180^{\circ}-{\tau}$ 시이퀸스를 이용한 핵자기 공명 혈관 조영술 (MR ANGIOGRAPHY USING THE COMPOSITE [$90^{\circ}-{\tau}-180^{\circ}-2{\tau}-180^{\circ}-{\tau}$] SEQUENCE)

  • 김재호;이기동;전현호;조장희
    • 대한의용생체공학회:학술대회논문집
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    • 대한의용생체공학회 1989년도 춘계학술대회
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    • pp.35-37
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    • 1989

  • A new MR angiography technique using a composite sequence for the suppression of static sample signals is proposed and verified with experiments. When the composite [$90^{\circ}-{\tau}-180^{\circ}-2{\tau}-180^{\circ}-{\tau}$] sequence is applied, the large signal from the static sample is sufficiently suppressed but the signal from fresh inflow sample of which amplitude. is observed without suppression. These properties are appropriate for angiographic applications. In this paper, a modified line scan method (Block line scan angiography) incorporated with the composite [$90^{\circ}-{\tau}-180^{\circ}-2{\tau}-180^{\circ}-{\tau}$] sequence is used to obtain flow-only images, i.e., angiograms. The block line scan method improves the resolution in the flow-direction at the expense of imaging time. With the composite sequence, there is no need for subtraction procedure as in the most conventional angiographic methods. Experimental results for a phantom and a normal volunteer with KAIS 2.0 Tesla MRI system are shown.

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