scholarly journals Newer magnetic resonance imaging techniques in neurocysticercosis

2020 ◽  
Vol 33 (6) ◽  
pp. 538-544
Author(s):  
Akash Batta ◽  
Karthik Vinay Mahesh ◽  
Nandita Prabhat ◽  
Ritu Shree ◽  
Manoj K Goyal ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Steady State ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Imaging Techniques ◽  
Resonance Spectroscopy ◽  
Susceptibility Weighted Imaging ◽  
Resonance Imaging ◽  
Constructive Interference ◽  
Magnetic Resonance Imaging Techniques

Introduction The definitive diagnosis of neurocysticercosis continues to be challenging. We evaluate the role of newer magnetic resonance imaging techniques including constructive interference in steady state, susceptibility-weighted imaging, arterial spin labelling and magnetic resonance spectroscopy in the diagnosis of neurocysticercosis. Aims and objectives To study the utility of newer magnetic resonance imaging sequences in the diagnosis of neurocysticercosis. Patients and methods Eighty-five consecutive patients with neurocysticercosis attending a tertiary care hospital and teaching centre in northern India were included in the study. The diagnosis of neurocysticercosis was made by the Del Brutto criteria. All patients received treatment according to standard guidelines and were followed at 3-month intervals. The following magnetic resonance sequences were performed at baseline: T1 and T2-weighted axial sequences; T2 fluid-attenuated inversion recovery axial sequences; diffusion-weighted imaging; susceptibility-weighted imaging; pre and post-contrast T1-weighted imaging; heavily T2-weighted thin sections (constructive interference in steady state); arterial spin labelling ( n = 19); and magnetic resonance spectroscopy ( n = 24). Results The mean (±SD) age was 29.4 ± 12.9 years and 76.5% were men. Seizures were the commonest symptom (89.4%) followed by headache (24.3%), encephalitis (9.4%) and raised intracranial pressure (9.4%). Scolex could be visualised in 43.7%, 55.5% and 61.2% of neurocysticercosis patients using conventional, susceptibility-weighted angiography and constructive interference in steady state imaging sequences, respectively. Susceptibility-weighted angiography and constructive interference in steady state images resulted in significantly higher ( P < 0.01) visualisation of scolex compared to conventional sequences. Conclusion Newer magnetic resonance imaging modalities have a lot of promise for improving the radiological diagnosis of neurocysticercosis.

Definitive Diagnosis and Location of Peanuts in the Airways Using Magnetic Resonance Imaging Techniques

1994 ◽  
Vol 23 (6) ◽  
pp. 1379-1382 ◽  
Author(s):  
Hitoshi Imaizumi ◽  
Masamitsu Kaneko ◽  
Satoshi Nara ◽  
Hiroko Saito ◽  
Koji Asakura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging Techniques ◽  
Definitive Diagnosis ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Techniques

Cubatic structural transformation of granular cylinders packing

Soft Matter ◽  
2021 ◽  
Author(s):  
Yunhao Ding ◽  
Dianjinfeng Gong ◽  
Jing Yang ◽  
Zhen Xu ◽  
Zhichao Wang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Boundary Condition ◽  
Magnetic Resonance ◽  
Aspect Ratio ◽  
Structural Transformation ◽  
Imaging Techniques ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Techniques

Packing structures of granular cylinders with aspect ratio close to one have been reconstructed with the help of magnetic resonance imaging techniques. By controlling the container boundary condition and preparation...

Comparison of Diagnostic Accuracy of Magnetic Resonance Spectroscopy with Conventional Magnetic Resonance Imaging for Brain Tumors and Correlation with Histopathology as Gold Standard

2021 ◽  
Vol 15 (9) ◽  
pp. 4009-4011
Author(s):  
Saulat Sarfraz ◽  
Mahwish Farzana
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Brain Tumors ◽  
Diagnostic Accuracy ◽  
Gold Standard ◽  
Age Groups ◽  
Resonance Spectroscopy ◽  
Resonance Imaging ◽  
Conventional Mri

Background: In spite of recent advances in the use of diagnostic imaging modalities none of them has a hundred percent accuracy. So, misdiagnosis still occurs. Many trials are being done to evaluate the accuracy of these tools individually or in combination. The most useful investigation is MRI which broadly gives information of lesion as well its relationship with surrounding structures. While magnetic resonance spectroscopy further characterizes the lesion into benign or malignant. So this study is bit superior giving more details. By enlarge histopathology is gold standard for ultimate diagnosis. However these radiological investigations are extremely important for preoperative planning as well management of the lesion. In this study we compare the diagnostic accuracy of Magnetic Resonance Spectroscopy (MRS) with conventional MRI (Magnetic Resonance Imaging) sequences for diagnosis of brain tumors keeping histopathology as gold standard. Methods: The study was performed in 150 clinically suspected cases which were referred to Radiology Department from OPD, Indoor, Emergency and private sources from outside the hospital. Results: Majority 85(56.7%) were adult males and 65(43.3%) were adult females. The study was divided into two major age groups. There were 33cases (22%) with average age 20-35 years. The other age group 36-50 years had 40(26.7%) Majority of the cases 77(51.3%) were of average >50 years of age. The higher age groups showed a female dominance. Histopathology of 100(66.7%) cases confirmed positive and 50(33.3%) negative for MR Spectroscopy. On comparison of conventional MRI with contrast, and Histopathology it was observed that the sensitivity of MRI was 74.0% and the specificity 82.0%.The positive and negative predictive values gave a lower accuracy rate of 76.6%. Conclusion: The conclusion of our study is that MRS is a rigorous, non-invasive, safe and convenient imaging modality for the evaluation of brain tumors as compared to MRI. Keywords: Brain tumors, MRI, MRS, Histopathology

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