کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3075359 1580963 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modified human contrast sensitivity function based phase mask for susceptibility-weighted imaging
ترجمه فارسی عنوان
عملکرد فیزیکی حساسیت کنترلی انسان مبتنی بر ماسک فاز مبتنی بر تصویربرداری حساس به حساسیت
کلمات کلیدی
تصویر برداری وزن حساسیت، ماسک فاز فیلتر کردن فاز، عملکرد حساسیت کنترلی انسان
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی روانپزشکی بیولوژیکی
چکیده انگلیسی


• Perception of image content is defined by the human contrast sensitivity function.
• Human contrast sensitivity function enhanced susceptibility weighted images.
• Marked increase in spatial frequency perception of brain images was achieved.
• The approach can potentially be used to improve diagnosis of diseases and disorders.

The aim of the work is to increase the visual information in magnetic resonance imaging based susceptibility weighted images. Our approach is to amplify spatial frequency information of the phase mask used to increase susceptibility weighting using a modified version of the human contrast sensitivity function. Thereby, we propose a modified version of the human contrast sensitivity function for use in phase mask creation. Comparison with conventional susceptibility-weighted imaging was undertaken on a qualitative basis and quantitatively with a number of established image quality metrics on ex vivo mouse brain magnetic resonance images obtained at 16.4 T at various echo times. Four experts also compared the quality of in vivo 1.5 and 3 T human brain magnetic resonance images generated with traditional susceptibility weighted imaging and with the new method. We found that parameters of the modified human contrast sensitivity function can be chosen to improve delineation of structural detail of mouse and human brains. Information contained in susceptibility-weighted images generated using the modified human contrast sensitivity function based phase mask corresponds to that in the conventional method, however the visual range over which it is depicted has improved visual perception. Hence, qualitative evaluation of information contained in susceptibility-weighted images can be improved by amplifying spatial frequencies where human contrast sensitivity is reduced.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage: Clinical - Volume 4, 2014, Pages 765–778
نویسندگان
, , , , ,