Improved human brain tractographs using multi-shell q-ball diffusion magnetic resonance imaging compared with DTI
Message:
Article Type:
Research/Original Article (بدون رتبه معتبر)
Abstract:
Introduction
Recently, it has been proven that assuming the Gaussian model in DTImethod is inappropriate for propagation in a complex substrate such as human braintissue. High Angular Resolution Diffusion Imaging (HARDI) (or so called q-ball imaging)is known as a model free method that allows to more accurately detect changes in diffusionwith different orientations. In this study, after finding the best angle threshold at the OpticRadiation (OR) level, the length and number of reconstructed nerve fibers in this anglewere measured using q-ball imaging and were compared with DTI.
Materials and Method
Tractographs of q-ball images from the human brains of 10healthy volunteers (30 to 50 years old) were studied using a 3-Tesla scanner. 64 directionsof diffusion encoding in two b-values (1000 and 2000 s/mm2), were used for q-ballimaging and in routine b-value of 1000 s/mm2 for DTI. The tractographs were comparedat the OR level with the tractography based on q-ball and DTI images. The results wereanalyzed using t-test. The angle threshold for tractography was selected at 45 degrees bycomparing the tractographs in 13 angles.
Conclusion
Consequently, the number and length of nerve fibers of OR, measured usingthe q-ball imaging, were significantly higher than those using the DTI. Finally, the betterquality of the tractographs as well as the analyzed quantities, are indicators of larger signalto-noise ratio in q-ball imaging and indicate that q-ball imaging compared to DTI plays animportant role in the development of brain nerve mapping.
Language:
English
Published:
Journal of Advanced Medical Sciences and Applied Technologies, Volume:6 Issue: 1, Dec 2021
Pages:
14 to 23
magiran.com/p2432592  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!