Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

9.1K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
9.1K
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

230
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
230
Echo01:06

Echo

915
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
915
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

1.2K
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
1.2K
Nuclear Magnetic Resonance (NMR): Overview01:07

Nuclear Magnetic Resonance (NMR): Overview

6.8K
Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
6.8K
Resonance02:52

Resonance

64.8K
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
64.8K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Application of zero-TE MRI for the disk calcification of the temporomandibular joint: two case reports.

Oral surgery, oral medicine, oral pathology and oral radiology·2026
Same author

Force effect of MRI scanner on dental appliances and instruments.

Oral radiology·2026
Same author

A novel dual-energy cone beam computed tomography device for assessment of jaw bone density.

Oral radiology·2026
Same author

Longitudinal Computed Tomographic Evaluation of Mandibular Bone Morphology Following OnabotulinumtoxinA Treatment of Masseter Muscle Prominence: Results of a 12-Month, Repeat-Treatment, Placebo-Controlled Study in Healthy Adults.

Aesthetic surgery journal·2026
Same author

Comparison of measurement of the apical anatomy of maxillary central incisors using cone-beam computed tomography and conventional intraoral radiographs.

BMC oral health·2026
Same author

Expression Analysis, Diagnostic and Prognostic Accuracy of microRNAs in Oral Cancer: An Overview With Meta-Analysis.

International dental journal·2026

相关实验视频

Updated: Jan 23, 2026

Multiple-mouse Neuroanatomical Magnetic Resonance Imaging
09:08

Multiple-mouse Neuroanatomical Magnetic Resonance Imaging

Published on: February 27, 2011

16.4K

使用零回声时间磁共振成像进行面测量.

Yuka Uchimoto1, Maziahtul Zawani Binti Munshi1, Tadashi Sasai1

  • 1Department of Oral and Maxillofacial Radiology, Graduate School of Dentistry, The University of Osaka, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.

Dento maxillo facial radiology
|January 21, 2026
PubMed
概括

零回声时间磁共振成像 (ZTE-MRI) 为面测量提供了无辐射的替代方案,与多探测器CT (MDCT) 对骨标志有很好的一致性. 然而,牙科测量的准确性需要进一步调查.

关键词:
头脑测量术 (Cephalometry) 是一种测量头脑的方法.头骨面部异常 头骨面部异常磁共振成像是一种磁共振成像技术.辐射暴露 辐射暴露结果的可复制性 结果的可复制性断层扫描,X射线计算机扫描

更多相关视频

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
09:59

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia

Published on: September 16, 2017

14.6K
Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

20.1K

相关实验视频

Last Updated: Jan 23, 2026

Multiple-mouse Neuroanatomical Magnetic Resonance Imaging
09:08

Multiple-mouse Neuroanatomical Magnetic Resonance Imaging

Published on: February 27, 2011

16.4K
A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
09:59

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia

Published on: September 16, 2017

14.6K
Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

20.1K

科学领域:

  • 牙大和面部成像检查
  • 医学成像技术 医学成像技术
  • 放射学 放射学是一门学科.

背景情况:

  • 辐射暴露在牙和面部成像中是一个重大问题,特别是在需要频繁检查的儿科和年轻成年人群中.
  • 计算机断层扫描 (CT) 和脑电测,虽然很常见,但涉及电离辐射.
  • 零回声时间磁共振成像 (ZTE-MRI) 可以在没有辐射的情况下可视化皮质骨,但其临床头应用有限.

研究的目的:

  • 评估使用ZTE-MRI进行三维面测量的可行性和精度.
  • 为了比较ZTE-MRI测量与多探测器CT (MDCT) 获得的测量.
  • 评估ZTE-MRI作为牙大和面部成像中的非电离替代品的潜力.

主要方法:

  • 29名参与者接受了MDCT和ZTE-MRI扫描.
  • 标识了标准的头脑测量地标,可以推导出27个线性变量和21个角度变量.
  • 使用线性回归分析来比较MDCT和ZTE-MRI之间的测量.

主要成果:

  • 对于ZTE-MRI和MDCT之间的许多线性和角度变量,观察到高程度的一致性 (回归系数在0.9-1.1之间,R平方≥0.81).
  • 对于大多数变量,科恩效应大小处于可接受的±0.8范围之内.
  • 涉及牙参考点的测量显示,与骨参考点相比,一致性较低.

结论:

  • ZTE-MRI为从骨参考点获得的面测量提供了临床上可接受的结果.
  • 该技术在主要骨标志上与MDCT有很好的一致性,支持其对无辐射骨评估的潜力.
  • 需要进一步的研究来提高ZTE-MRI在涉及牙科参考点的测量准确度.