DESIGNING PROTOCOL OF MR FOR ANGIOGRAPHY OF LOWER LIMBS USING MRI INSTRUMENT 1.5 TASLA

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RYAHI ALAM N.; SALAR SH.A.; RAHIMI S.A.

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Paper Information

Journal: JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES Year:2004 | Volume:14 | Issue:42 Page(s): 98-107

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Title

DESIGNING PROTOCOL OF MR FOR ANGIOGRAPHY OF LOWER LIMBS USING MRI INSTRUMENT 1.5 TASLA

Author(s)

RYAHI ALAM N. | SALAR SH.A. | RAHIMI S.A. | Issue Writer Certificate

Keywords

ANGIOGRAPHYQ3

EXTREMITIESQ4

MAGNETIC RESONANCE ANGIOGRAPHY (MRI)Q4

LOWER EXTREMITYQ4

Abstract

Background and purpose: On time diagnosis and treatment of lower limb diseases are of crucial importance to the patients. Conventional ANGIOGRAPHY is the standard procedure of diagnosis, which is followed by different problems such as, X-ray hazards, sensitivity to contrast drugs and complications of opening vessel. Doppler ultrasonography has low differentiation power. MR ANGIOGRAPHY is a suitable procedure for diagnosing vessel diseases. During different studies on 1.5 Tasla equipments it was possible to obtain proper images with different values for different parts of limb. To date no research of such kind has been done in Iran and ANGIOGRAPHY of lower limbs is not done at present. In this study, it was tried to proper images of lower limbs considering the capabilities of designed protocol system.Materials and methods: 1.5 Tasla MRI equipments with optimized parameters for different positions calculated on the volunteers, patients and phantom was used. SNR and CNR images were compared, and categorized by radiologist based on diagnostic values. Results: 2D-ROF4 method using GRE-spoiled pulse sequences were selected and TR/TE/FA/Th parameters for pelvis area 20/6/90/5, thigh area 30/6/90/4, knee and leg 33/8/60/2/5 were obtained. First stage of recovery current, a lower, mobile pre saturated pulses, NSA=1, matrix size 128 to 180 at direct phase and 256 direct frequency were selected. The qualitative value of the images 3 at pelvis area; 3 at femoral and knee areas; and 4 for knee was obtained. Total time required for imaging of lower limb was 45 minutes.Conclusion: Althoagh spoiled GRE 20-TOF method does not produce acceptable images compared to the femora conventional ANGIOGRAPHY, the value of obtained images taken particularly for knee were significant and can be a good reference of required information for surgeons and specialists. This technique is useful particularly for the patients who can not go under conventional ANGIOGRAPHY. The value of the MR images using contrast drug is higher than the images obtained by this method, however this method is cheaper.

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APA: Copy

RYAHI ALAM, N., SALAR, SH.A., & RAHIMI, S.A.. (2004). DESIGNING PROTOCOL OF MR FOR ANGIOGRAPHY OF LOWER LIMBS USING MRI INSTRUMENT 1.5 TASLA . JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES, 14(42), 98-107. SID. https://sid.ir/paper/44409/en

Vancouver: Copy

RYAHI ALAM N., SALAR SH.A., RAHIMI S.A.. DESIGNING PROTOCOL OF MR FOR ANGIOGRAPHY OF LOWER LIMBS USING MRI INSTRUMENT 1.5 TASLA . JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2004;14(42):98-107. Available from: https://sid.ir/paper/44409/en

IEEE: Copy

N. RYAHI ALAM, SH.A. SALAR, and S.A. RAHIMI, “DESIGNING PROTOCOL OF MR FOR ANGIOGRAPHY OF LOWER LIMBS USING MRI INSTRUMENT 1.5 TASLA ,” JOURNAL OF MAZANDARAN UNIVERSITY OF MEDICAL SCIENCES, vol. 14, no. 42, pp. 98–107, 2004, [Online]. Available: https://sid.ir/paper/44409/en

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