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Magnetic-resonance Imaging - Wiley Online Library

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Last Updated: 04 December 2022

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A modified threshold score‐based multilevel thresholding segmentation technique for brain magnetic resonance images using opposition‐based learning hybrid rice optimization algorithm

Magnetic resonance imaging is increasingly used for brain tumor detection in modern clinical diagnostics due to its high resolution of soft tissues, which plays a vital role in tumor prevention, detection, and treatment planning. An opposition-based learning hybrid rice optimization algorithm is used to reduce MTS's computational cost for the purpose of minimizing the threshold search. Comparing the results with TS, Tsallis, Kapur, and Masi2010OHRO, MTSu2010OHRO, MTS-u2010OHRO shows that the application of MTSu2010OHRO to MR images is both efficient and cost-effective, as shown by the following results.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/ima.22830


Characteristic magnetic resonance imaging of leptomeningeal metastases of lung adenocarcinoma: fluid‐attenuated inversion recovery and diffusion‐weighted imaging hyperintensity on brainstem surfaces

We discuss a case of leptomeningeal carcinomatosis in a patient with relapsed lung adenocarcinoma who suffered with tinnitus and hearing loss for three months here in. The ratio of the proportion of carcinoembryonic antigen in the serum and cerebrospinal fluid was 1. 2:1. The cerebrospinal fluid cytology obtained at the fourth lumbar puncture revealed suspicion of malignancy, and a definitive diagnosis of metastatic adenocarcinoma was confirmed by brain biopsy.

Source link: https://onlinelibrary.wiley.com/doi/10.1111/ncn3.12684


Cellular Toxicities of Gadolinium‐Based Contrast Agents Used in Magnetic Resonance Imaging

As a radiological device, contrast agents have been used in magnetic resonance imaging. Argonnetically based contrast agents such as Gadoliniumu2010 are the ones most commonly used in MRI to raise signal intensity due to their paramagnetic characteristics. According to studies, gadolinium crystals accumulate after injection to humans with or without renal impairment. Normal cell growth and genetic aberration are important because they may lead to carcinogenesis in somatic cells or may be passed to the next generation through germ cells. Hence, knowing the effect of GBCAs on cells is crucial for their safer use in clinical settings in order to produce high-quality contrastu2010enhanced magnetic resonance images.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/jat.4416


Using a convolutional neural network model to derive imaging landmarks for lumbar spine numbering on axial magnetic resonance images

Detailed information regarding the lumbar spine anatomy, as well as information about the relationship between the lumbar spine level and other paraspinal structures, is vital for diagnosing and treating diseases. This project was conducted to establish the reliability of a convolutional neural network model in lumbar spine level numbering using axial magnetic resonance images and to find the right anatomic landmarks for numbering using a class activation map. A total of 6055 axial MR images of the lumbar spine from L1u20102 to L5u2010S1 disc sizes were obtained to train and verify the CNN model. The overall reliability of the best-u2010performing model for lumbar spine numbering was 0. 98 on internal validation and 0. 95 on external validation. On axial MR photographs, a CNN model can accurately determine the lumbar spine, and muscle elasticity can be used to determine the lumbar spine's height.

Source link: https://onlinelibrary.wiley.com/doi/10.1002/ima.22828

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions