Patterns of Signal Intensity in CISS MRI of the Inner Ear and Eye.

IF 2.2 4区医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Tomography Pub Date : 2024-01-29 DOI:10.3390/tomography10020016

Antonia Mair, Christopher I Song, Bela Büki, Bryan K Ward

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引用次数: 0

Abstract

Background: Constructive interference in steady state (CISS) is a gradient echo magnetic resonance imaging (MRI) pulse sequence that provides excellent contrast between cerebrospinal fluid and adjacent structures but is prone to banding artifacts due to magnetic field inhomogeneities. We aimed to characterize artifacts in the inner ear and eye.

Methods: In 30 patients (60 ears/eyes) undergoing CISS sequence MRI, nine low-signal intensity regions were identified in the inner ear and compared to temporal bone histopathology. The number and angle of bands across the eye were examined.

Results: In the cochlea, all ears had regions of low signal corresponding to anatomy (modiolus (all), spiral lamina (n = 59, 98.3%), and interscalar septa (n = 50, 83.3%)). In the labyrinth, the lateral semicircular canal crista (n = 42, 70%) and utricular macula (n = 47, 78.3%) were seen. Areas of low signal in the vestibule seen in all ears may represent the walls of the membranous utricle. Zero to three banding artifacts were seen in both eyes (right: 96.7%, mean 1.5; left: 93.3%, mean 1.3).

Conclusion: Low signal regions in the inner ear on CISS sequences are common and have consistent patterns; most in the inner ear represent anatomy, appearing blurred due to partial volume averaging. Banding artifacts in the eye are more variable.

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内耳和眼部 CISS MRI 的信号强度模式。

背景：稳态建设性干扰（CISS）是一种梯度回波磁共振成像（MRI）脉冲序列，可在脑脊液和邻近结构之间提供极佳的对比度，但容易因磁场不均匀而产生带状伪影。我们的目的是分析内耳和眼部的伪影特征：方法：在接受 CISS 序列磁共振成像检查的 30 名患者（60 耳/眼）中，确定了内耳中的九个低信号强度区域，并与颞骨组织病理学进行了比较。结果：结果：在耳蜗中，所有耳朵都有与解剖结构相对应的低信号区域（模耳（全部）、螺旋膜（n = 59，98.3%）和鳞状间隔（n = 50，83.3%））。在迷宫中，可以看到外侧半规管嵴（n = 42，70%）和子宫黄斑（n = 47，78.3%）。在所有耳朵中都能看到前庭的低信号区，这可能是膜状子宫壁。双眼均出现零至三个条带伪影（右眼：96.7%，平均 1.5；左眼：93.3%，平均 1.3）：结论：CISS 序列中内耳的低信号区域很常见，且模式一致；内耳的大部分区域代表解剖结构，由于部分容积平均化而显得模糊不清。眼部的带状伪影变化较大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Tomography Medicine-Radiology, Nuclear Medicine and Imaging

CiteScore

2.70

自引率

10.50%

发文量

222

期刊介绍： TomographyTM publishes basic (technical and pre-clinical) and clinical scientific articles which involve the advancement of imaging technologies. Tomography encompasses studies that use single or multiple imaging modalities including for example CT, US, PET, SPECT, MR and hyperpolarization technologies, as well as optical modalities (i.e. bioluminescence, photoacoustic, endomicroscopy, fiber optic imaging and optical computed tomography) in basic sciences, engineering, preclinical and clinical medicine. Tomography also welcomes studies involving exploration and refinement of contrast mechanisms and image-derived metrics within and across modalities toward the development of novel imaging probes for image-based feedback and intervention. The use of imaging in biology and medicine provides unparalleled opportunities to noninvasively interrogate tissues to obtain real-time dynamic and quantitative information required for diagnosis and response to interventions and to follow evolving pathological conditions. As multi-modal studies and the complexities of imaging technologies themselves are ever increasing to provide advanced information to scientists and clinicians. Tomography provides a unique publication venue allowing investigators the opportunity to more precisely communicate integrated findings related to the diverse and heterogeneous features associated with underlying anatomical, physiological, functional, metabolic and molecular genetic activities of normal and diseased tissue. Thus Tomography publishes peer-reviewed articles which involve the broad use of imaging of any tissue and disease type including both preclinical and clinical investigations. In addition, hardware/software along with chemical and molecular probe advances are welcome as they are deemed to significantly contribute towards the long-term goal of improving the overall impact of imaging on scientific and clinical discovery.