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1392/1/25، جلد ۴۰، شماره ۱، صفحات -
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Improvement of brain angiographic images using 1.5t super conductive MRI unit of Imam Khomeini Hospital |
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| چکیده انگلیسی مقاله |
Fue to the importance of selecting imaging parameters in magnetic resonance brain angiography, this study was carried out to choose optimum theoretical and experimental parameters for improving image controast and resolution and achieve shorter imaging time for practical reasons.A 1.5T super conductive magnet MRI with gradient power of 13 nT/m and Larmour frequency of 63 MHz with imaging coli of 30 cm was used.In this study, 5 healthy volunteers and 34 patients were the subjects of brain angiography. Flip angles of 15-20 degrees for peripheral brain vessels and 35-45 degrees for internal brain vessels were found to give higher contrast and better image resolution with a artifact. Using our optimum imaging parameters, (ie [TR/Te/FA/FOV] [40ms/7cm/20°/1mm 023cm], besides obtaining high quality angiography images, routine imaging time of 9-12 minutes was reduced to 7.3 mintues |
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| کلیدواژه‌های انگلیسی مقاله |
Magnetic resonance angiography (MRA), 3-Dimensional time of flight magnetic resonance angiography (3D-TOF-MRA), Maximum intensity projection algorithm (MIP), Fast low angle shot (FLASH), |
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| نویسندگان مقاله |
38882---38883--- |
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| نشانی اینترنتی |
http://acta.tums.ac.ir/index.php/acta/article/viewArticle/2600 |
| فایل مقاله |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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| نوع مقاله منتشر شده |
Article(s) |
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