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Video
How MRI Works: Part 1 - NMR Basics. First in a series on how MRI works. This video deals with NMR basis such as spin, precession, T1 and T2, TR and TE, and Boltzmann Magnetization. 0:00 - Introduction 1:22 - Nuclear Magnetic Resonance 4:10 - Inside the MRI Scanner 7:50 - The Proton, Spin, and Precession 11:34 - Signal Detection and the Larmor Equation 14:10 - Flip Angle 15:30 - Ensemble Magnetic Moment 16:34 - Free Induction Decay and T2 18:43 - T2 Weighting and TE 21:46 - Spin Density Imaging 24:18 - T1 Relaxation 25:45 - T1 Weighting and TR 27:01 - The NMR Experiment and Rotating Frame 28:57 - Excitation: the B1 field 30:14 - Measuring Longitudinal Magnetization 31:34 - The MR Contrast Equation 34:42 - Boltzmann Magnetization and Polarization 40:09 - Hyperpolarization 41:42 - Outro
- Course related:
- BME42113 Biomedical Imaging
- Subjects:
- Medical Imaging and Physics
- Keywords:
- Magnetic resonance imaging
- Resource Type:
- Video
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Video
Can we make tattoos both beautiful and functional? Nanotechnologist Carson Bruns shares his work creating high-tech tattoos that react to their environment -- like color-changing ink that can tell you when you're getting a sunburn -- and shows exciting ways they can deliver real-time information about our health.
- Subjects:
- Health Technology and Informatics and Biology
- Keywords:
- Tattooing -- Health aspects
- Resource Type:
- Video
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Video
Have you ever come across times when you get particularly nervous, say during a presentation, you find it extra hard to speak smoothly? Most of us may stop at times when we talk, so how do we differentiate between Normal Dysfluency and Stuttering? Are kids struggling with words due to language ability or are they stuttering? Will they naturally outgrow stuttering? How do speech therapists help adults and children who stutter?
大家有否試過在某些時間特別緊張,例如在發佈會中,你覺得難以流暢地說話? 其實每一個人說話時也會有停頓的時候,到底我們如何分辨「口吃」和正常的不流暢呢? 孩子到底是口吃還是因語言能力較弱而在找字呢?是否長大後自然會沒有口吃的問題? 言語治療師可以如何幫助受口吃困擾的小孩和成人呢?
- Subjects:
- Health Sciences and Communication
- Keywords:
- Stuttering Speech disorders
- Resource Type:
- Video
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Video
A short video on dysgraphia for the general public.
[讀寫障礙 - 書寫困難] 有沒有家長發現學童無論重複抄寫多少次,還是難以記住如何寫字,默書成績更是強差人意?有時候他們會寫字出格、混淆筆劃等,有時候他們可能寫了一半又寫不下去,到底為什麼會這樣的呢?言語治療師如何可以幫助他們呢?我們聽一聽讀寫專家 - 劉博士的解說。
- Subjects:
- Health Sciences and Communication
- Keywords:
- Agraphia Writing Language disorders
- Resource Type:
- Video
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Video
A short video on self description for the general public.
上一集,我們為大家介紹了「平行描述」的促進語言發展技巧,讓小孩一面玩耍,一面吸收家長的語言輸入。今集我們會介紹另一個技巧 - 「自行描述」,家長們可以一起試一試運用這些技巧,讓孩子邊玩邊學習!
- Subjects:
- Health Sciences and Communication
- Keywords:
- Children -- Language Games
- Resource Type:
- Video
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Video
A short video on parallel description for the general public.
我們經常聽說小孩可以一面玩耍一面學習,除了學習遊玩技巧外, 原來家長作爲小孩的主要溝通對象,是可以爲他們營造一個良好的語言學習環境, 從而促進語言發展。今集,我們會為大家講解和示範其中一種「促進語言發展技巧」 - 自行描述。大家一起看看到底如何能夠做到自行描述吧!
- Subjects:
- Health Sciences and Communication
- Keywords:
- Children -- Language Games
- Resource Type:
- Video
-
Video
A short video on autism for the general public.
近期,我們經常會聽到有關自閉症的案例, 知道自閉症對於患者及家人都會帶來很大的影響和困擾,究竟什麼是自閉症?(0:45) 有什麼病癥會與自閉症會同時出現?(1:21) 自閉症對於語言有影響嗎?(3:06) 如何可以及早發現自閉症傾向?(4:10) 有沒有藥物可以治療自閉症?(5:20) 對於高功能自閉症,大家也有不同的迷思 (2:24),一起聽聽專家的解說吧!
- Subjects:
- Health Sciences and Communication
- Keywords:
- Autism
- Resource Type:
- Video