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Comparative evaluation of magnetization transfer contrast and fluid attenuated inversion recovery sequences in brain
1Department of Radiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow 226014, India.
Aim:
To compare T1-weighted magnetization transfer (MT) with fluid attenuated inversion recovery (FLAIR) imaging for evaluating conspicuity and number of lesions in individuals with brain tuberculoma.
Materials And Methods:
In all 28 patients with brain tuberculoma underwent MR examination using fast spin-echo (FSE) T2, spin-echo (SE) T1, T1-weighted MT and FLAIR imaging. Post-contrast T1-weighted MT imaging was taken as the gold standard for assessing the number of lesions. Tuberculomas detected both on T1-weighted MT and FLAIR imaging were examined for the wall to be defined, and were divided into two groups on the basis of presence (group 1) or absence (group 2) of perilesional oedema visible on FLAIR imaging. The mean signal intensity of the wall of the lesions and adjacent oedema or brain parenchyma was analyzed qualitatively and quantitatively.
Results:
The number of lesions detected on T1-weighted MT was higher than on FLAIR imaging (209 versus 163). Conspicuity in both groups was better on T1-weighted MT images qualitatively as well as quantitatively. The difference in the signal intensity of the wall of the lesion and perilesional oedema was statistically significant only on T1-weighted MT images in group 1 (p=0.0003 versus 0.3), whereas in group 2 it was statistically significant both on T1-weighted MT and FLAIR imaging (p=0.009 versus 0.05).
Conclusion:
FLAIR imaging is not helpful in the examination of brain tuberculomas compared with T1-weighted MT imaging, as it neither contributes to the characterization of lesion nor assesses the true disease load.
Insights
T1-weighted magnetization transfer (MT) imaging detects more brain tuberculoma lesions than FLAIR imaging. MT imaging also offers better lesion conspicuity and characterization, making it superior for assessing disease load.
Area of Science:
- Neuroradiology
- Infectious Disease Imaging
Background:
- Brain tuberculoma is a significant cause of neurological morbidity.
- Accurate lesion detection and characterization are crucial for effective management.
- Conventional MRI sequences may have limitations in fully evaluating brain tuberculomas.
Purpose of the Study:
- To compare the efficacy of T1-weighted magnetization transfer (MT) imaging versus fluid-attenuated inversion recovery (FLAIR) imaging.
- To evaluate lesion conspicuity and accurate lesion counting in patients with brain tuberculoma.
- To determine the optimal MRI technique for assessing brain tuberculoma burden.
Main Methods:
- 28 patients with brain tuberculoma underwent MRI including T1-weighted MT and FLAIR sequences.
- Post-contrast T1-weighted MT imaging served as the gold standard for lesion enumeration.
- Lesions were analyzed for wall definition and perilesional edema, with signal intensity quantified.
Main Results:
- T1-weighted MT imaging identified more lesions (209) compared to FLAIR (163).
- Lesion conspicuity was superior on T1-weighted MT images, both qualitatively and quantitatively.
- Significant signal intensity differences between lesion walls and surrounding tissue were more evident on T1-weighted MT imaging.
Conclusions:
- FLAIR imaging is less effective than T1-weighted MT imaging for brain tuberculoma evaluation.
- T1-weighted MT imaging provides better lesion conspicuity and aids in disease load assessment.
- MT imaging is recommended for comprehensive characterization of brain tuberculomas.
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Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...